loops can be debugged more effectively on production
systems.
- clearcpuid=BITNUM [X86]
+ clearcpuid=BITNUM[,BITNUM...] [X86]
Disable CPUID feature X for the kernel. See
arch/x86/include/asm/cpufeatures.h for the valid bit
numbers. Note the Linux specific bits are not necessarily
some critical bits.
cma=nn[MG]@[start[MG][-end[MG]]]
- [ARM,X86,KNL]
+ [KNL,CMA]
Sets the size of kernel global memory area for
contiguous memory allocations and optionally the
placement constraint by the physical address range of
memory allocations. A value of 0 disables CMA
altogether. For more information, see
- include/linux/dma-contiguous.h
+ kernel/dma/contiguous.c
+
+ cma_pernuma=nn[MG]
+ [ARM64,KNL]
+ Sets the size of kernel per-numa memory area for
+ contiguous memory allocations. A value of 0 disables
+ per-numa CMA altogether. And If this option is not
+ specificed, the default value is 0.
+ With per-numa CMA enabled, DMA users on node nid will
+ first try to allocate buffer from the pernuma area
+ which is located in node nid, if the allocation fails,
+ they will fallback to the global default memory area.
cmo_free_hint= [PPC] Format: { yes | no }
Specify whether pages are marked as being inactive
Arch Perfmon v4 (Skylake and newer).
disable_ddw [PPC/PSERIES]
- Disable Dynamic DMA Window support. Use this if
+ Disable Dynamic DMA Window support. Use this
to workaround buggy firmware.
disable_ipv6= [IPV6]
what data is available or for reverse-engineering.
dyndbg[="val"] [KNL,DYNAMIC_DEBUG]
- module.dyndbg[="val"]
+ <module>.dyndbg[="val"]
Enable debug messages at boot time. See
Documentation/admin-guide/dynamic-debug-howto.rst
for details.
nopku [X86] Disable Memory Protection Keys CPU feature found
in some Intel CPUs.
- module.async_probe [KNL]
+ <module>.async_probe [KNL]
Enable asynchronous probe on this module.
early_ioremap_debug [KNL]
current integrity status.
failslab=
+ fail_usercopy=
fail_page_alloc=
fail_make_request=[KNL]
General fault injection mechanism.
Format: <interval>,<probability>,<space>,<times>
See also Documentation/fault-injection/.
+ fb_tunnels= [NET]
+ Format: { initns | none }
+ See Documentation/admin-guide/sysctl/net.rst for
+ fb_tunnels_only_for_init_ns
+
floppy= [HW]
See Documentation/admin-guide/blockdev/floppy.rst.
1 - Bypass the IOMMU for DMA.
unset - Use value of CONFIG_IOMMU_DEFAULT_PASSTHROUGH.
- io7= [HW] IO7 for Marvel based alpha systems
+ io7= [HW] IO7 for Marvel-based Alpha systems
See comment before marvel_specify_io7 in
arch/alpha/kernel/core_marvel.c.
kgdbwait [KGDB] Stop kernel execution and enter the
kernel debugger at the earliest opportunity.
- kmac= [MIPS] korina ethernet MAC address.
+ kmac= [MIPS] Korina ethernet MAC address.
Configure the RouterBoard 532 series on-chip
Ethernet adapter MAC address.
[KVM,ARM] Allow use of GICv4 for direct injection of
LPIs.
+ kvm_cma_resv_ratio=n [PPC]
+ Reserves given percentage from system memory area for
+ contiguous memory allocation for KVM hash pagetable
+ allocation.
+ By default it reserves 5% of total system memory.
+ Format: <integer>
+ Default: 5
+
kvm-intel.ept= [KVM,Intel] Disable extended page tables
(virtualized MMU) support on capable Intel chips.
Default is 1 (enabled)
lapic [X86-32,APIC] Enable the local APIC even if BIOS
disabled it.
- lapic= [X86,APIC] "notscdeadline" Do not use TSC deadline
+ lapic= [X86,APIC] Do not use TSC deadline
value for LAPIC timer one-shot implementation. Default
back to the programmable timer unit in the LAPIC.
+ Format: notscdeadline
lapic_timer_c2_ok [X86,APIC] trust the local apic timer
in C2 power state.
memblock=debug [KNL] Enable memblock debug messages.
- load_ramdisk= [RAM] List of ramdisks to load from floppy
- See Documentation/admin-guide/blockdev/ramdisk.rst.
+ load_ramdisk= [RAM] [Deprecated]
lockd.nlm_grace_period=P [NFS] Assign grace period.
Format: <integer>
(machvec) in a generic kernel.
Example: machvec=hpzx1
- machtype= [Loongson] Share the same kernel image file between different
- yeeloong laptop.
+ machtype= [Loongson] Share the same kernel image file between
+ different yeeloong laptops.
Example: machtype=lemote-yeeloong-2f-7inch
max_addr=nn[KMG] [KNL,BOOT,ia64] All physical memory greater
and gids from such clients. This is intended to ease
migration from NFSv2/v3.
+ nmi_backtrace.backtrace_idle [KNL]
+ Dump stacks even of idle CPUs in response to an
+ NMI stack-backtrace request.
+
nmi_debug= [KNL,SH] Specify one or more actions to take
when a NMI is triggered.
Format: [state][,regs][,debounce][,die]
register save and restore. The kernel will only save
legacy floating-point registers on task switch.
- nohugeiomap [KNL,X86,PPC] Disable kernel huge I/O mappings.
+ nohugeiomap [KNL,X86,PPC,ARM64] Disable kernel huge I/O mappings.
nosmt [KNL,S390] Disable symmetric multithreading (SMT).
Equivalent to smt=1.
Param: <number> - step/bucket size as a power of 2 for
statistical time based profiling.
- prompt_ramdisk= [RAM] List of RAM disks to prompt for floppy disk
- before loading.
- See Documentation/admin-guide/blockdev/ramdisk.rst.
+ prompt_ramdisk= [RAM] [Deprecated]
prot_virt= [S390] enable hosting protected virtual machines
isolated from the hypervisor (if hardware supports
ramdisk_size= [RAM] Sizes of RAM disks in kilobytes
See Documentation/admin-guide/blockdev/ramdisk.rst.
+ ramdisk_start= [RAM] RAM disk image start address
+
random.trust_cpu={on,off}
[KNL] Enable or disable trusting the use of the
CPU's random number generator (if available) to
This wake_up() will be accompanied by a
WARN_ONCE() splat and an ftrace_dump().
+ rcutree.rcu_unlock_delay= [KNL]
+ In CONFIG_RCU_STRICT_GRACE_PERIOD=y kernels,
+ this specifies an rcu_read_unlock()-time delay
+ in microseconds. This defaults to zero.
+ Larger delays increase the probability of
+ catching RCU pointer leaks, that is, buggy use
+ of RCU-protected pointers after the relevant
+ rcu_read_unlock() has completed.
+
rcutree.sysrq_rcu= [KNL]
Commandeer a sysrq key to dump out Tree RCU's
rcu_node tree with an eye towards determining
why a new grace period has not yet started.
- rcuperf.gp_async= [KNL]
+ rcuscale.gp_async= [KNL]
Measure performance of asynchronous
grace-period primitives such as call_rcu().
- rcuperf.gp_async_max= [KNL]
+ rcuscale.gp_async_max= [KNL]
Specify the maximum number of outstanding
callbacks per writer thread. When a writer
thread exceeds this limit, it invokes the
corresponding flavor of rcu_barrier() to allow
previously posted callbacks to drain.
- rcuperf.gp_exp= [KNL]
+ rcuscale.gp_exp= [KNL]
Measure performance of expedited synchronous
grace-period primitives.
- rcuperf.holdoff= [KNL]
+ rcuscale.holdoff= [KNL]
Set test-start holdoff period. The purpose of
this parameter is to delay the start of the
test until boot completes in order to avoid
interference.
- rcuperf.kfree_rcu_test= [KNL]
+ rcuscale.kfree_rcu_test= [KNL]
Set to measure performance of kfree_rcu() flooding.
- rcuperf.kfree_nthreads= [KNL]
+ rcuscale.kfree_nthreads= [KNL]
The number of threads running loops of kfree_rcu().
- rcuperf.kfree_alloc_num= [KNL]
+ rcuscale.kfree_alloc_num= [KNL]
Number of allocations and frees done in an iteration.
- rcuperf.kfree_loops= [KNL]
- Number of loops doing rcuperf.kfree_alloc_num number
+ rcuscale.kfree_loops= [KNL]
+ Number of loops doing rcuscale.kfree_alloc_num number
of allocations and frees.
- rcuperf.nreaders= [KNL]
+ rcuscale.nreaders= [KNL]
Set number of RCU readers. The value -1 selects
N, where N is the number of CPUs. A value
"n" less than -1 selects N-n+1, where N is again
A value of "n" less than or equal to -N selects
a single reader.
- rcuperf.nwriters= [KNL]
+ rcuscale.nwriters= [KNL]
Set number of RCU writers. The values operate
- the same as for rcuperf.nreaders.
+ the same as for rcuscale.nreaders.
N, where N is the number of CPUs
- rcuperf.perf_type= [KNL]
+ rcuscale.perf_type= [KNL]
Specify the RCU implementation to test.
- rcuperf.shutdown= [KNL]
+ rcuscale.shutdown= [KNL]
Shut the system down after performance tests
complete. This is useful for hands-off automated
testing.
- rcuperf.verbose= [KNL]
+ rcuscale.verbose= [KNL]
Enable additional printk() statements.
- rcuperf.writer_holdoff= [KNL]
+ rcuscale.writer_holdoff= [KNL]
Write-side holdoff between grace periods,
in microseconds. The default of zero says
no holdoff.
are zero, rcutorture acts as if is interpreted
they are all non-zero.
+ rcutorture.irqreader= [KNL]
+ Run RCU readers from irq handlers, or, more
+ accurately, from a timer handler. Not all RCU
+ flavors take kindly to this sort of thing.
+
+ rcutorture.leakpointer= [KNL]
+ Leak an RCU-protected pointer out of the reader.
+ This can of course result in splats, and is
+ intended to test the ability of things like
+ CONFIG_RCU_STRICT_GRACE_PERIOD=y to detect
+ such leaks.
+
rcutorture.n_barrier_cbs= [KNL]
Set callbacks/threads for rcu_barrier() testing.
refscale.shutdown= [KNL]
Shut down the system at the end of the performance
test. This defaults to 1 (shut it down) when
- rcuperf is built into the kernel and to 0 (leave
- it running) when rcuperf is built as a module.
+ refscale is built into the kernel and to 0 (leave
+ it running) when refscale is built as a module.
refscale.verbose= [KNL]
Enable additional printk() statements.
Format: integer between 0 and 10
Default is 0.
+ scftorture.holdoff= [KNL]
+ Number of seconds to hold off before starting
+ test. Defaults to zero for module insertion and
+ to 10 seconds for built-in smp_call_function()
+ tests.
+
+ scftorture.longwait= [KNL]
+ Request ridiculously long waits randomly selected
+ up to the chosen limit in seconds. Zero (the
+ default) disables this feature. Please note
+ that requesting even small non-zero numbers of
+ seconds can result in RCU CPU stall warnings,
+ softlockup complaints, and so on.
+
+ scftorture.nthreads= [KNL]
+ Number of kthreads to spawn to invoke the
+ smp_call_function() family of functions.
+ The default of -1 specifies a number of kthreads
+ equal to the number of CPUs.
+
+ scftorture.onoff_holdoff= [KNL]
+ Number seconds to wait after the start of the
+ test before initiating CPU-hotplug operations.
+
+ scftorture.onoff_interval= [KNL]
+ Number seconds to wait between successive
+ CPU-hotplug operations. Specifying zero (which
+ is the default) disables CPU-hotplug operations.
+
+ scftorture.shutdown_secs= [KNL]
+ The number of seconds following the start of the
+ test after which to shut down the system. The
+ default of zero avoids shutting down the system.
+ Non-zero values are useful for automated tests.
+
+ scftorture.stat_interval= [KNL]
+ The number of seconds between outputting the
+ current test statistics to the console. A value
+ of zero disables statistics output.
+
+ scftorture.stutter_cpus= [KNL]
+ The number of jiffies to wait between each change
+ to the set of CPUs under test.
+
+ scftorture.use_cpus_read_lock= [KNL]
+ Use use_cpus_read_lock() instead of the default
+ preempt_disable() to disable CPU hotplug
+ while invoking one of the smp_call_function*()
+ functions.
+
+ scftorture.verbose= [KNL]
+ Enable additional printk() statements.
+
+ scftorture.weight_single= [KNL]
+ The probability weighting to use for the
+ smp_call_function_single() function with a zero
+ "wait" parameter. A value of -1 selects the
+ default if all other weights are -1. However,
+ if at least one weight has some other value, a
+ value of -1 will instead select a weight of zero.
+
+ scftorture.weight_single_wait= [KNL]
+ The probability weighting to use for the
+ smp_call_function_single() function with a
+ non-zero "wait" parameter. See weight_single.
+
+ scftorture.weight_many= [KNL]
+ The probability weighting to use for the
+ smp_call_function_many() function with a zero
+ "wait" parameter. See weight_single.
+ Note well that setting a high probability for
+ this weighting can place serious IPI load
+ on the system.
+
+ scftorture.weight_many_wait= [KNL]
+ The probability weighting to use for the
+ smp_call_function_many() function with a
+ non-zero "wait" parameter. See weight_single
+ and weight_many.
+
+ scftorture.weight_all= [KNL]
+ The probability weighting to use for the
+ smp_call_function_all() function with a zero
+ "wait" parameter. See weight_single and
+ weight_many.
+
+ scftorture.weight_all_wait= [KNL]
+ The probability weighting to use for the
+ smp_call_function_all() function with a
+ non-zero "wait" parameter. See weight_single
+ and weight_many.
+
skew_tick= [KNL] Offset the periodic timer tick per cpu to mitigate
xtime_lock contention on larger systems, and/or RCU lock
contention on all systems with CONFIG_MAXSMP set.
ACPI PMIC DRIVERS
S: Supported
F: Documentation/devicetree/bindings/interrupt-controller/amazon,al-fic.txt
F: drivers/irqchip/irq-al-fic.c
+AMAZON ANNAPURNA LABS MEMORY CONTROLLER EDAC
+S: Maintained
+F: Documentation/devicetree/bindings/edac/amazon,al-mc-edac.yaml
+F: drivers/edac/al_mc_edac.c
+
AMAZON ANNAPURNA LABS THERMAL MMIO DRIVER
S: Maintained
F: arch/arm64/boot/dts/amd/amd-seattle-xgbe*.dtsi
F: drivers/net/ethernet/amd/xgbe/
-ANALOG DEVICES INC AD5686 DRIVER
-S: Supported
-W: http://ez.analog.com/community/linux-device-drivers
-F: drivers/iio/dac/ad5686*
-F: drivers/iio/dac/ad5696*
-
-ANALOG DEVICES INC AD5758 DRIVER
+AMS AS73211 DRIVER
-S: Supported
-W: http://ez.analog.com/community/linux-device-drivers
-F: Documentation/devicetree/bindings/iio/dac/ad5758.txt
-F: drivers/iio/dac/ad5758.c
-
-ANALOG DEVICES INC AD7091R5 DRIVER
-S: Supported
-W: http://ez.analog.com/community/linux-device-drivers
-F: Documentation/devicetree/bindings/iio/adc/adi,ad7091r5.yaml
-F: drivers/iio/adc/ad7091r5.c
-
-ANALOG DEVICES INC AD7124 DRIVER
-S: Supported
-W: http://ez.analog.com/community/linux-device-drivers
-F: Documentation/devicetree/bindings/iio/adc/adi,ad7124.yaml
-F: drivers/iio/adc/ad7124.c
+S: Maintained
+F: Documentation/devicetree/bindings/iio/light/ams,as73211.yaml
+F: drivers/iio/light/as73211.c
ANALOG DEVICES INC AD7192 DRIVER
F: Documentation/devicetree/bindings/iio/adc/adi,ad7292.yaml
F: drivers/iio/adc/ad7292.c
-ANALOG DEVICES INC AD7606 DRIVER
-S: Supported
-W: http://ez.analog.com/community/linux-device-drivers
-F: Documentation/devicetree/bindings/iio/adc/adi,ad7606.yaml
-F: drivers/iio/adc/ad7606.c
-
ANALOG DEVICES INC AD7768-1 DRIVER
F: Documentation/devicetree/bindings/iio/imu/adi,adis16475.yaml
ANALOG DEVICES INC ADM1177 DRIVER
S: Supported
S: Maintained
F: drivers/media/i2c/adv7842*
+ANALOG DEVICES INC ADXRS290 DRIVER
+S: Supported
+F: drivers/iio/gyro/adxrs290.c
+F: Documentation/devicetree/bindings/iio/gyroscope/adi,adxrs290.yaml
+
ANALOG DEVICES INC ASOC CODEC DRIVERS
W: http://ez.analog.com/community/linux-device-drivers
F: drivers/dma/dma-axi-dmac.c
-ANALOG DEVICES INC HMC425A DRIVER
-S: Supported
-W: http://ez.analog.com/community/linux-device-drivers
-F: Documentation/devicetree/bindings/iio/amplifiers/adi,hmc425a.yaml
-F: drivers/iio/amplifiers/hmc425a.c
-
ANALOG DEVICES INC IIO DRIVERS
W: http://ez.analog.com/community/linux-device-drivers
F: Documentation/ABI/testing/sysfs-bus-iio-frequency-ad9523
F: Documentation/ABI/testing/sysfs-bus-iio-frequency-adf4350
+F: Documentation/devicetree/bindings/iio/*/adi,*
+F: Documentation/devicetree/bindings/iio/dac/ad5758.txt
F: drivers/iio/*/ad*
F: drivers/iio/adc/ltc249*
+F: drivers/iio/amplifiers/hmc425a.c
F: drivers/staging/iio/*/ad*
X: drivers/iio/*/adjd*
F: Documentation/devicetree/bindings/net/apm-xgene-enet.txt
F: Documentation/devicetree/bindings/net/apm-xgene-mdio.txt
F: drivers/net/ethernet/apm/xgene/
-F: drivers/net/phy/mdio-xgene.c
+F: drivers/net/mdio/mdio-xgene.c
APPLIED MICRO (APM) X-GENE SOC PMU
S: Maintained
F: Documentation/devicetree/bindings/iommu/arm,smmu*
F: drivers/iommu/arm/
-F: drivers/iommu/io-pgtable-arm-v7s.c
-F: drivers/iommu/io-pgtable-arm.c
+F: drivers/iommu/io-pgtable-arm*
ARM SUB-ARCHITECTURES
S: Maintained
F: Documentation/devicetree/bindings/arm/actions.yaml
F: Documentation/devicetree/bindings/clock/actions,owl-cmu.txt
-F: Documentation/devicetree/bindings/dma/owl-dma.txt
+F: Documentation/devicetree/bindings/dma/owl-dma.yaml
F: Documentation/devicetree/bindings/i2c/i2c-owl.txt
+F: Documentation/devicetree/bindings/interrupt-controller/actions,owl-sirq.yaml
F: Documentation/devicetree/bindings/mmc/owl-mmc.yaml
-F: Documentation/devicetree/bindings/pinctrl/actions,s900-pinctrl.txt
+F: Documentation/devicetree/bindings/pinctrl/actions,*
F: Documentation/devicetree/bindings/power/actions,owl-sps.txt
F: Documentation/devicetree/bindings/timer/actions,owl-timer.txt
F: arch/arm/boot/dts/owl-*
F: drivers/clocksource/timer-owl*
F: drivers/dma/owl-dma.c
F: drivers/i2c/busses/i2c-owl.c
+F: drivers/irqchip/irq-owl-sirq.c
F: drivers/mmc/host/owl-mmc.c
F: drivers/pinctrl/actions/*
F: drivers/soc/actions/
ARM/Annapurna Labs ALPINE ARCHITECTURE
S: Maintained
F: arch/arm/boot/dts/alpine*
S: Maintained
F: Documentation/ABI/testing/sysfs-bus-coresight-devices-*
S: Maintained
F: Documentation/devicetree/bindings/media/s5p-cec.txt
-F: drivers/media/platform/s5p-cec/
+F: drivers/media/cec/platform/s5p/
ARM/SAMSUNG S5P SERIES JPEG CODEC SUPPORT
F: drivers/clk/socfpga/
ARM/SOCFPGA EDAC SUPPORT
S: Maintained
F: drivers/edac/altera_edac.
S: Maintained
F: Documentation/devicetree/bindings/media/tegra-cec.txt
-F: drivers/media/platform/tegra-cec/
+F: drivers/media/cec/platform/tegra/
ARM/TETON BGA MACHINE SUPPORT
+R: Andrii Nakryiko <andrii@kernel.org>
F: drivers/pci/controller/pcie-brcmstb.c
N: brcmstb
+BROADCOM BDC DRIVER
+S: Maintained
+F: Documentation/devicetree/bindings/usb/brcm,bdc.txt
+F: drivers/usb/gadget/udc/bdc/
+
BROADCOM BMIPS CPUFREQ DRIVER
F: drivers/net/ethernet/broadcom/bnx2_*
BROADCOM BNX2FC 10 GIGABIT FCOE DRIVER
S: Supported
F: drivers/scsi/bnx2fc/
BROADCOM BNX2I 1/10 GIGABIT iSCSI DRIVER
S: Supported
F: drivers/scsi/bnx2i/
F: Documentation/devicetree/bindings/mtd/cadence-nand-controller.txt
F: drivers/mtd/nand/raw/cadence-nand-controller.c
+CADENCE USB3 DRD IP DRIVER
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/peter.chen/usb.git
+F: Documentation/devicetree/bindings/usb/cdns-usb3.txt
+F: drivers/usb/cdns3/
+
CADET FM/AM RADIO RECEIVER DRIVER
F: include/uapi/linux/can.h
F: include/uapi/linux/can/bcm.h
F: include/uapi/linux/can/gw.h
+F: include/uapi/linux/can/isotp.h
F: include/uapi/linux/can/raw.h
F: net/can/
W: http://linuxtv.org
T: git git://linuxtv.org/media_tree.git
F: Documentation/devicetree/bindings/media/cec-gpio.txt
-F: drivers/media/platform/cec-gpio/
+F: drivers/media/cec/platform/cec-gpio/
CELL BROADBAND ENGINE ARCHITECTURE
F: drivers/char/
F: drivers/misc/
F: include/linux/miscdevice.h
+X: drivers/char/agp/
+X: drivers/char/hw_random/
+X: drivers/char/ipmi/
+X: drivers/char/random.c
+X: drivers/char/tpm/
CHECKPATCH
S: Maintained
F: sound/soc/codecs/cs*
CISCO VIC LOW LATENCY NIC DRIVER
S: Supported
F: drivers/infiniband/hw/usnic/
T: git git://git.infradead.org/users/hch/configfs.git
F: fs/configfs/
F: include/linux/configfs.h
+F: samples/configfs/
CONSOLE SUBSYSTEM
W: http://www.chelsio.com
F: drivers/crypto/chelsio
+CXGB4 INLINE CRYPTO DRIVER
+S: Supported
+W: http://www.chelsio.com
+F: drivers/net/ethernet/chelsio/inline_crypto/
+
CXGB4 ETHERNET DRIVER (CXGB4)
F: drivers/base/devcoredump.c
F: include/linux/devcoredump.h
+DEVICE DEPENDENCY HELPER SCRIPT
+S: Maintained
+F: scripts/dev-needs.sh
+
DEVICE DIRECT ACCESS (DAX)
F: include/asm-generic/dma-mapping.h
F: include/linux/dma-direct.h
F: include/linux/dma-mapping.h
-F: include/linux/dma-noncoherent.h
+F: include/linux/dma-map-ops.h
F: kernel/dma/
DMA-BUF HEAPS FRAMEWORK
F: lib/kobj*
DRIVERS FOR ADAPTIVE VOLTAGE SCALING (AVS)
S: Maintained
DRM DRIVER FOR ASPEED BMC GFX
S: Supported
T: git git://anongit.freedesktop.org/drm/drm-misc
F: Documentation/devicetree/bindings/gpu/aspeed-gfx.txt
DRM DRIVER FOR AST SERVER GRAPHICS CHIPS
-S: Odd Fixes
+S: Supported
+T: git git://anongit.freedesktop.org/drm/drm-misc
F: drivers/gpu/drm/ast/
DRM DRIVER FOR BOCHS VIRTUAL GPU
F: drivers/gpu/drm/panel/panel-lvds.c
F: Documentation/devicetree/bindings/display/panel/lvds.yaml
+DRM DRIVER FOR MANTIX MLAF057WE51 PANELS
+S: Maintained
+F: Documentation/devicetree/bindings/display/panel/mantix,mlaf057we51-x.yaml
+F: drivers/gpu/drm/panel/panel-mantix-mlaf057we51.c
+
DRM DRIVER FOR MATROX G200/G400 GRAPHICS CARDS
S: Orphan / Obsolete
F: drivers/gpu/drm/mga/
F: include/uapi/drm/mga_drm.h
-DRM DRIVER FOR MGA G200 SERVER GRAPHICS CHIPS
+DRM DRIVER FOR MGA G200 GRAPHICS CHIPS
-S: Odd Fixes
+S: Supported
+T: git git://anongit.freedesktop.org/drm/drm-misc
F: drivers/gpu/drm/mgag200/
DRM DRIVER FOR MI0283QT
F: Documentation/devicetree/bindings/display/panel/raydium,rm67191.yaml
F: drivers/gpu/drm/panel/panel-raydium-rm67191.c
-DRM DRIVER FOR ROCKTECH JH057N00900 PANELS
+DRM DRIVER FOR SITRONIX ST7703 PANELS
S: Maintained
-F: Documentation/devicetree/bindings/display/panel/rocktech,jh057n00900.txt
-F: drivers/gpu/drm/panel/panel-rocktech-jh057n00900.c
+F: Documentation/devicetree/bindings/display/panel/rocktech,jh057n00900.yaml
+F: drivers/gpu/drm/panel/panel-sitronix-st7703.c
DRM DRIVER FOR SAVAGE VIDEO CARDS
S: Orphan / Obsolete
DRM DRIVER FOR USB DISPLAYLINK VIDEO ADAPTERS
-S: Odd Fixes
+S: Supported
T: git git://anongit.freedesktop.org/drm/drm-misc
F: drivers/gpu/drm/udl/
DRM DRIVER FOR VIRTUAL KERNEL MODESETTING (VKMS)
DRM DRIVERS FOR HISILICON
-M: Rongrong Zou <zourongrong@gmail.com>
+M: Tian Tao <tiantao6@hisilicon.com>
S: Supported
F: Documentation/devicetree/bindings/display/mediatek/
F: drivers/gpu/drm/mediatek/
+F: drivers/phy/mediatek/phy-mtk-hdmi*
DRM DRIVERS FOR NVIDIA TEGRA
S: Supported
T: git git://linuxtv.org/pinchartl/media drm/du/next
F: Documentation/devicetree/bindings/display/bridge/renesas,dw-hdmi.txt
-F: Documentation/devicetree/bindings/display/bridge/renesas,lvds.txt
+F: Documentation/devicetree/bindings/display/bridge/renesas,lvds.yaml
F: Documentation/devicetree/bindings/display/renesas,du.txt
F: drivers/gpu/drm/rcar-du/
F: drivers/gpu/drm/shmobile/
F: drivers/edac/bluefield_edac.c
EDAC-CALXEDA
S: Maintained
F: drivers/edac/highbank*
F: Documentation/devicetree/bindings/net/mdio*
F: Documentation/devicetree/bindings/net/qca,ar803x.yaml
F: Documentation/networking/phy.rst
+F: drivers/net/mdio/
+F: drivers/net/mdio/of_mdio.c
+F: drivers/net/pcs/
F: drivers/net/phy/
-F: drivers/of/of_mdio.c
F: drivers/of/of_net.c
F: include/dt-bindings/net/qca-ar803x.h
F: include/linux/*mdio*.h
+F: include/linux/mdio/*.h
F: include/linux/of_net.h
F: include/linux/phy.h
F: include/linux/phy_fixed.h
F: include/linux/bootconfig.h
F: lib/bootconfig.c
F: tools/bootconfig/*
+F: tools/bootconfig/scripts/*
EXYNOS DP DRIVER
FPGA DFL DRIVERS
S: Maintained
+F: Documentation/ABI/testing/sysfs-bus-dfl
F: Documentation/fpga/dfl.rst
F: drivers/fpga/dfl*
F: include/uapi/linux/fpga-dfl.h
FPGA MANAGER FRAMEWORK
S: Maintained
W: http://www.rocketboards.org
S: Maintained
F: Documentation/admin-guide/perf/imx-ddr.rst
-F: Documentation/devicetree/bindings/perf/fsl-imx-ddr.txt
+F: Documentation/devicetree/bindings/perf/fsl-imx-ddr.yaml
F: drivers/perf/fsl_imx8_ddr_perf.c
FREESCALE IMX I2C DRIVER
S: Maintained
-F: Documentation/devicetree/bindings/i2c/i2c-imx.txt
+F: Documentation/devicetree/bindings/i2c/i2c-imx.yaml
F: drivers/i2c/busses/i2c-imx.c
FREESCALE IMX LPI2C DRIVER
S: Maintained
-F: Documentation/devicetree/bindings/i2c/i2c-imx-lpi2c.txt
+F: Documentation/devicetree/bindings/i2c/i2c-imx-lpi2c.yaml
F: drivers/i2c/busses/i2c-imx-lpi2c.c
FREESCALE QORIQ DPAA ETHERNET DRIVER
GCC PLUGINS
S: Maintained
F: Documentation/kbuild/gcc-plugins.rst
F: scripts/Makefile.gcc-plugins
F: drivers/watchdog/hpwdt.c
HEWLETT-PACKARD SMART ARRAY RAID DRIVER (hpsa)
-M: Don Brace <don.brace@microsemi.com>
-L: esc.storagedev@microsemi.com
+M: Don Brace <don.brace@microchip.com>
+L: storagedev@microchip.com
S: Supported
F: Documentation/scsi/hpsa.rst
F: include/uapi/linux/cciss*.h
HFI1 DRIVER
-M: Mike Marciniszyn <mike.marciniszyn@intel.com>
-M: Dennis Dalessandro <dennis.dalessandro@intel.com>
+M: Mike Marciniszyn <mike.marciniszyn@cornelisnetworks.com>
+M: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>
S: Supported
F: drivers/infiniband/hw/hfi1
F: Documentation/devicetree/bindings/net/hisilicon*.txt
F: drivers/net/ethernet/hisilicon/
+HIKEY960 ONBOARD USB GPIO HUB DRIVER
+S: Maintained
+F: drivers/misc/hisi_hikey_usb.c
+F: Documentation/devicetree/bindings/misc/hisilicon-hikey-usb.yaml
+
HISILICON PMU DRIVER
S: Supported
F: drivers/crypto/hisilicon/sec2/sec_crypto.h
F: drivers/crypto/hisilicon/sec2/sec_main.c
+HISILICON STAGING DRIVERS FOR HIKEY 960/970
+S: Maintained
+F: drivers/staging/hikey9xx/
+
HISILICON TRUE RANDOM NUMBER GENERATOR V2 SUPPORT
S: Maintained
IIO SUBSYSTEM AND DRIVERS
S: Maintained
F: arch/mips/boot/dts/ingenic/
-F: arch/mips/include/asm/mach-jz4740/
-F: arch/mips/jz4740/
+F: arch/mips/generic/board-ingenic.c
+F: arch/mips/include/asm/mach-ingenic/
+F: arch/mips/ingenic/Kconfig
F: drivers/clk/ingenic/
F: drivers/dma/dma-jz4780.c
F: drivers/gpu/drm/ingenic/
K: \b(ABS|SYN)_MT_
INSIDE SECURE CRYPTO DRIVER
S: Maintained
F: drivers/crypto/inside-secure/
S: Maintained
F: Documentation/userspace-api/media/v4l/pixfmt-srggb10-ipu3.rst
INTEL IPU3 CSI-2 IMGU DRIVER
S: Maintained
F: Documentation/admin-guide/media/ipu3.rst
F: drivers/platform/x86/intel_punit_ipc.c
INTEL PMC CORE DRIVER
-M: Rajneesh Bhardwaj <rajneesh.bhardwaj@intel.com>
-M: Vishwanath Somayaji <vishwanath.somayaji@intel.com>
+M: Rajneesh Bhardwaj <irenic.rajneesh@gmail.com>
+M: David E Box <david.e.box@intel.com>
S: Maintained
F: drivers/platform/x86/intel_pmc_core*
F: drivers/gpio/gpio-msic.c
INTEL PMIC MULTIFUNCTION DEVICE DRIVERS
S: Maintained
F: drivers/mfd/intel_msic.c
F: drivers/mfd/intel_soc_pmic*
S: Maintained
T: git git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu.git
F: Documentation/devicetree/bindings/iommu/
+F: Documentation/userspace-api/iommu.rst
F: drivers/iommu/
F: include/linux/iommu.h
F: include/linux/iova.h
KEYS-TRUSTED
+M: Jarkko Sakkinen <jarkko@kernel.org>
KEYS/KEYRINGS
+M: Jarkko Sakkinen <jarkko@kernel.org>
S: Maintained
F: Documentation/security/keys/core.rst
S: Maintained
F: Documentation/dev-tools/kmemleak.rst
F: include/linux/kmemleak.h
-F: mm/kmemleak-test.c
F: mm/kmemleak.c
+F: samples/kmemleak/kmemleak-test.c
KMOD KERNEL MODULE LOADER - USERMODE HELPER
F: drivers/auxdisplay/ks0108.c
F: include/linux/ks0108.h
+KTD253 BACKLIGHT DRIVER
+S: Maintained
+F: Documentation/devicetree/bindings/leds/backlight/kinetic,ktd253.yaml
+F: drivers/video/backlight/ktd253-backlight.c
+
L3MDEV
LEAKING_ADDRESSES
S: Maintained
T: git git://git.kernel.org/pub/scm/linux/kernel/git/tobin/leaks.git
F: scripts/leaking_addresses.pl
F: drivers/ata/pata_arasan_cf.c
F: include/linux/pata_arasan_cf_data.h
-LIBATA PATA DRIVERS
-S: Maintained
-T: git git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git
-F: drivers/ata/ata_generic.c
-F: drivers/ata/pata_*.c
-
LIBATA PATA FARADAY FTIDE010 AND GEMINI SATA BRIDGE DRIVERS
W: http://linux-test-project.github.io/
T: git git://github.com/linux-test-project/ltp.git
+LYNX PCS MODULE
+S: Supported
+F: drivers/net/pcs/pcs-lynx.c
+F: include/linux/pcs-lynx.h
+
M68K ARCHITECTURE
S: Maintained
F: Documentation/devicetree/bindings/net/marvell,mvusb.yaml
-F: drivers/net/phy/mdio-mvusb.c
+F: drivers/net/mdio/mdio-mvusb.c
MARVELL XENON MMC/SD/SDIO HOST CONTROLLER DRIVER
S: Maintained
F: drivers/hid/hid-mcp2221.c
+MCP251XFD SPI-CAN NETWORK DRIVER
+S: Maintained
+F: Documentation/devicetree/bindings/net/can/microchip,mcp251xfd.yaml
+F: drivers/net/can/spi/mcp251xfd/
+
MCP4018 AND MCP4531 MICROCHIP DIGITAL POTENTIOMETER DRIVERS
MEDIATEK USB3 DRD IP DRIVER
S: Maintained
W: http://linux-meson.com/
T: git git://linuxtv.org/media_tree.git
F: Documentation/devicetree/bindings/media/amlogic,meson-gx-ao-cec.yaml
-F: drivers/media/platform/meson/ao-cec-g12a.c
-F: drivers/media/platform/meson/ao-cec.c
+F: drivers/media/cec/platform/meson/ao-cec-g12a.c
+F: drivers/media/cec/platform/meson/ao-cec.c
MESON NAND CONTROLLER DRIVER FOR AMLOGIC SOCS
F: drivers/mtd/nand/raw/meson_*
MESON VIDEO DECODER DRIVER FOR AMLOGIC SOCS
S: Maintained
T: git git://git.kernel.org/pub/scm/linux/kernel/git/mani/mhi.git
+F: Documentation/ABI/stable/sysfs-bus-mhi
F: Documentation/mhi/
F: drivers/bus/mhi/
F: include/linux/mhi.h
F: arch/mips/generic/board-ocelot.c
MICROSEMI SMART ARRAY SMARTPQI DRIVER (smartpqi)
-M: Don Brace <don.brace@microsemi.com>
-L: esc.storagedev@microsemi.com
+M: Don Brace <don.brace@microchip.com>
+L: storagedev@microchip.com
S: Supported
F: Documentation/scsi/smartpqi.rst
S: Supported
-F: Documentation/devicetree/bindings/power/mti,mips-cpc.txt
+F: Documentation/devicetree/bindings/power/mti,mips-cpc.yaml
F: arch/mips/generic/
F: arch/mips/tools/generic-board-config.sh
T: git git://git.kernel.org/pub/scm/linux/kernel/git/lkundrak/linux-mmp.git
F: arch/arm/boot/dts/mmp*
F: arch/arm/mach-mmp/
-F: linux/soc/mmp/
+F: include/linux/soc/mmp/
MMP USB PHY DRIVERS
T: git git://linuxtv.org/anttip/media_tree.git
F: drivers/media/usb/msi2500/
+MSTAR INTERRUPT CONTROLLER DRIVER
+S: Maintained
+F: Documentation/devicetree/bindings/interrupt-controller/mstar,mst-intc.yaml
+F: drivers/irqchip/irq-mst-intc.c
+
MSYSTEMS DISKONCHIP G3 MTD DRIVER
S: Maintained
W: https://fedorahosted.org/dropwatch/
-F: include/net/drop_monitor.h
F: include/uapi/linux/net_dropmon.h
F: net/core/drop_monitor.c
F: net/ipv6/xfrm*
F: net/key/
F: net/xfrm/
+F: tools/testing/selftests/net/ipsec.c
NETWORKING [IPv4/IPv6]
T: git git://git.kernel.org/pub/scm/linux/kernel/git/lftan/nios2.git
F: arch/nios2/
+NITRO ENCLAVES (NE)
+S: Supported
+W: https://aws.amazon.com/ec2/nitro/nitro-enclaves/
+F: Documentation/virt/ne_overview.rst
+F: drivers/virt/nitro_enclaves/
+F: include/linux/nitro_enclaves.h
+F: include/uapi/linux/nitro_enclaves.h
+F: samples/nitro_enclaves/
+
NOHZ, DYNTICKS SUPPORT
F: drivers/iio/gyro/fxas21002c_i2c.c
F: drivers/iio/gyro/fxas21002c_spi.c
+NXP i.MX 8MQ DCSS DRIVER
+S: Maintained
+F: Documentation/devicetree/bindings/display/imx/nxp,imx8mq-dcss.yaml
+F: drivers/gpu/drm/imx/dcss/
+
+NXP PTN5150A CC LOGIC AND EXTCON DRIVER
+S: Maintained
+F: Documentation/devicetree/bindings/extcon/extcon-ptn5150.yaml
+F: drivers/extcon/extcon-ptn5150.c
+
NXP SGTL5000 DRIVER
S: Maintained
-F: Documentation/devicetree/bindings/sound/sgtl5000.txt
+F: Documentation/devicetree/bindings/sound/sgtl5000.yaml
F: sound/soc/codecs/sgtl5000*
NXP SJA1105 ETHERNET SWITCH DRIVER
S: Supported
F: tools/objtool/
+F: include/linux/objtool.h
OCELOT ETHERNET SWITCH DRIVER
F: drivers/net/ethernet/mscc/
F: include/soc/mscc/ocelot*
F: net/dsa/tag_ocelot.c
+F: tools/testing/selftests/drivers/net/ocelot/*
OCXL (Open Coherent Accelerator Processor Interface OpenCAPI) DRIVER
F: drivers/media/i2c/ov2685.c
OMNIVISION OV2740 SENSOR DRIVER
-M: Tianshu Qiu <tian.shu.qiua@intel.com>
F: drivers/media/i2c/ov5640.c
OMNIVISION OV5647 SENSOR DRIVER
S: Maintained
T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/i2c/ov5647.yaml
F: drivers/media/i2c/ov5647.c
OMNIVISION OV5670 SENSOR DRIVER
F: drivers/char/hw_random/optee-rng.c
OPA-VNIC DRIVER
-M: Dennis Dalessandro <dennis.dalessandro@intel.com>
-M: Niranjana Vishwanathapura <niranjana.vishwanathapura@intel.com>
+M: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>
+M: Mike Marciniszyn <mike.marciniszyn@cornelisnetworks.com>
S: Supported
F: drivers/infiniband/ulp/opa_vnic
PADATA PARALLEL EXECUTION MECHANISM
S: Maintained
F: Documentation/core-api/padata.rst
F: include/linux/padata.h
S: Supported
-T: git git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers.git sh-pfc
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers.git renesas-pinctrl
F: Documentation/devicetree/bindings/pinctrl/renesas,*
-F: drivers/pinctrl/pinctrl-rz*
-F: drivers/pinctrl/sh-pfc/
+F: drivers/pinctrl/renesas/
PIN CONTROLLER - SAMSUNG
S: Maintained
F: include/linux/printk.h
F: kernel/printk/
F: include/uapi/linux/qemu_fw_cfg.h
QIB DRIVER
-M: Dennis Dalessandro <dennis.dalessandro@intel.com>
-M: Mike Marciniszyn <mike.marciniszyn@intel.com>
+M: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>
+M: Mike Marciniszyn <mike.marciniszyn@cornelisnetworks.com>
S: Supported
F: drivers/infiniband/hw/qib/
QLOGIC QL41xxx FCOE DRIVER
S: Supported
F: drivers/scsi/qedf/
QLOGIC QL41xxx ISCSI DRIVER
S: Supported
F: drivers/scsi/qedi/
S: Supported
-F: Documentation/scsi/LICENSE.qla2xxx
F: drivers/scsi/qla2xxx/
QLOGIC QLA3XXX NETWORK DRIVER
S: Supported
-F: Documentation/networking/device_drivers/ethernet/qlogic/LICENSE.qla3xxx
F: drivers/net/ethernet/qlogic/qla3xxx.*
QLOGIC QLA4XXX iSCSI DRIVER
S: Supported
-F: Documentation/scsi/LICENSE.qla4xxx
F: drivers/scsi/qla4xxx/
QLOGIC QLCNIC (1/10)Gb ETHERNET DRIVER
S: Maintained
F: Documentation/devicetree/bindings/media/i2c/imi,rdacm2x-gmsl.yaml
-F: drivers/media/i2c/rdacm20.c
F: drivers/media/i2c/max9271.c
F: drivers/media/i2c/max9271.h
+F: drivers/media/i2c/rdacm20.c
RDC R-321X SoC
F: drivers/net/ethernet/rdc/r6040.c
RDMAVT - RDMA verbs software
-M: Dennis Dalessandro <dennis.dalessandro@intel.com>
-M: Mike Marciniszyn <mike.marciniszyn@intel.com>
+M: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>
+M: Mike Marciniszyn <mike.marciniszyn@cornelisnetworks.com>
S: Supported
F: drivers/infiniband/sw/rdmavt
ROCKCHIP ISP V1 DRIVER
S: Maintained
+F: Documentation/admin-guide/media/rkisp1.rst
+F: Documentation/userspace-api/media/v4l/pixfmt-meta-rkisp1.rst
F: drivers/staging/media/rkisp1/
ROCKCHIP RASTER 2D GRAPHIC ACCELERATION UNIT DRIVER
F: include/media/drv-intf/s3c_camif.h
SAMSUNG S3FWRN5 NFC DRIVER
-S: Supported
+S: Maintained
+F: Documentation/devicetree/bindings/net/nfc/samsung,s3fwrn5.yaml
F: drivers/nfc/s3fwrn5
SAMSUNG S5C73M3 CAMERA DRIVER
S: Maintained
T: git git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git sched/core
SECO BOARDS CEC DRIVER
S: Maintained
-F: drivers/media/platform/seco-cec/seco-cec.c
-F: drivers/media/platform/seco-cec/seco-cec.h
+F: drivers/media/cec/platform/seco/seco-cec.c
+F: drivers/media/cec/platform/seco/seco-cec.h
SECURE COMPUTING
F: Documentation/ABI/obsolete/sysfs-selinux-checkreqprot
F: Documentation/ABI/obsolete/sysfs-selinux-disable
F: Documentation/admin-guide/LSM/SELinux.rst
+F: include/trace/events/avc.h
F: include/uapi/linux/selinux_netlink.h
F: scripts/selinux/
F: security/selinux/
S: Maintained
F: drivers/net/phy/phylink.c
F: drivers/net/phy/sfp*
+F: include/linux/mdio/mdio-i2c.h
F: include/linux/phylink.h
F: include/linux/sfp.h
K: phylink\.h|struct\s+phylink|\.phylink|>phylink_|phylink_(autoneg|clear|connect|create|destroy|disconnect|ethtool|helper|mac|mii|of|set|start|stop|test|validate)
SOFTLOGIC 6x10 MPEG CODEC
STAGING - SEPS525 LCD CONTROLLER DRIVERS
S: Supported
F: Documentation/devicetree/bindings/iio/adc/adi,ad7606.yaml
S: Maintained
F: Documentation/devicetree/bindings/media/stih-cec.txt
-F: drivers/media/platform/sti/cec/
+F: drivers/media/cec/platform/sti/
STK1160 USB VIDEO CAPTURE DRIVER
F: Documentation/devicetree/bindings/gpio/snps,dw-apb-gpio.yaml
F: drivers/gpio/gpio-dwapb.c
+SYNOPSYS DESIGNWARE APB SSI DRIVER
+S: Supported
+F: Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml
+F: drivers/spi/spi-dw*
+
SYNOPSYS DESIGNWARE AXI DMAC DRIVER
S: Maintained
S: Maintained
-F: Documentation/devicetree/bindings/dma/snps-dma.txt
+F: Documentation/devicetree/bindings/dma/snps,dma-spear1340.yaml
F: drivers/dma/dw/
F: include/dt-bindings/dma/dw-dmac.h
F: include/linux/dma/dw.h
S: Supported
-F: drivers/net/phy/mdio-xpcs.c
-F: include/linux/mdio-xpcs.h
+F: drivers/net/pcs/pcs-xpcs.c
+F: include/linux/pcs/pcs-xpcs.h
SYNOPSYS DESIGNWARE I2C DRIVER
T: git git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git dev
F: Documentation/RCU/torture.rst
F: kernel/locking/locktorture.c
- F: kernel/rcu/rcuperf.c
+ F: kernel/rcu/rcuscale.c
F: kernel/rcu/rcutorture.c
+ F: kernel/rcu/refscale.c
F: kernel/torture.c
TOSHIBA ACPI EXTRAS DRIVER
TPM DEVICE DRIVER
+M: Jarkko Sakkinen <jarkko@kernel.org>
S: Maintained
W: https://kernsec.org/wiki/index.php/Linux_Kernel_Integrity
Q: https://patchwork.kernel.org/project/linux-integrity/list/
-T: git git://git.infradead.org/users/jjs/linux-tpmdd.git
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd.git
F: drivers/char/tpm/
TRACING
W: http://www.linux-mtd.infradead.org/doc/ubifs.html
T: git git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs.git next
T: git git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs.git fixes
+F: Documentation/filesystems/ubifs-authentication.rst
F: Documentation/filesystems/ubifs.rst
F: fs/ubifs/
F: drivers/media/usb/uvc/
F: include/uapi/linux/uvcvideo.h
-USB VISION DRIVER
-S: Odd Fixes
-W: https://linuxtv.org
-T: git git://linuxtv.org/media_tree.git
-F: drivers/staging/media/usbvision/
-
USB WEBCAM GADGET
F: drivers/media/platform/video-mux.c
VIDEOBUF2 FRAMEWORK
S: Maintained
F: drivers/media/common/videobuf2/*
T: git git://linuxtv.org/media_tree.git
F: drivers/media/test-drivers/vivid/*
+VIDTV VIRTUAL DIGITAL TV DRIVER
+S: Maintained
+W: https://linuxtv.org
+T: git git://linuxtv.org/media_tree.git
+F: drivers/media/test-drivers/vidtv/*
+
VLYNQ BUS
S: Maintained
-T: git git://git.infradead.org/linux-platform-drivers-x86.git
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git
F: drivers/platform/olpc/
F: drivers/platform/x86/
F: Documentation/filesystems/zonefs.rst
F: fs/zonefs/
+ZR36067 VIDEO FOR LINUX DRIVER
+S: Maintained
+W: http://mjpeg.sourceforge.net/driver-zoran/
+Q: https://patchwork.linuxtv.org/project/linux-media/list/
+F: Documentation/driver-api/media/drivers/zoran.rst
+F: drivers/staging/media/zoran/
+
ZPOOL COMPRESSED PAGE STORAGE API
notifier.o ksysfs.o cred.o reboot.o \
async.o range.o smpboot.o ucount.o regset.o
-obj-$(CONFIG_BPFILTER) += usermode_driver.o
+obj-$(CONFIG_USERMODE_DRIVER) += usermode_driver.o
obj-$(CONFIG_MODULES) += kmod.o
obj-$(CONFIG_MULTIUSER) += groups.o
obj-$(CONFIG_BPF) += bpf/
obj-$(CONFIG_KCSAN) += kcsan/
obj-$(CONFIG_SHADOW_CALL_STACK) += scs.o
+obj-$(CONFIG_HAVE_STATIC_CALL_INLINE) += static_call.o
obj-$(CONFIG_PERF_EVENTS) += events/
KCSAN_SANITIZE_stackleak.o := n
KCOV_INSTRUMENT_stackleak.o := n
+ obj-$(CONFIG_SCF_TORTURE_TEST) += scftorture.o
+
$(obj)/configs.o: $(obj)/config_data.gz
targets += config_data.gz
/*
* If TIF_SYSCALL_EMU is set, then the only reason to report is when
* TIF_SINGLESTEP is set (i.e. PTRACE_SYSEMU_SINGLESTEP). This syscall
- * instruction has been already reported in syscall_enter_from_usermode().
+ * instruction has been already reported in syscall_enter_from_user_mode().
*/
#define SYSEMU_STEP (_TIF_SINGLESTEP | _TIF_SYSCALL_EMU)
* terminate a grace period, if and only if the timer interrupt is
* not nested into another interrupt.
*
- * Checking for __rcu_is_watching() here would prevent the nesting
+ * Checking for rcu_is_watching() here would prevent the nesting
* interrupt to invoke rcu_irq_enter(). If that nested interrupt is
* the tick then rcu_flavor_sched_clock_irq() would wrongfully
* assume that it is the first interupt and eventually claim
#endif
#define MODULE_PARAM_PREFIX "rcutree."
- #ifndef data_race
- #define data_race(expr) \
- ({ \
- expr; \
- })
- #endif
- #ifndef ASSERT_EXCLUSIVE_WRITER
- #define ASSERT_EXCLUSIVE_WRITER(var) do { } while (0)
- #endif
- #ifndef ASSERT_EXCLUSIVE_ACCESS
- #define ASSERT_EXCLUSIVE_ACCESS(var) do { } while (0)
- #endif
-
/* Data structures. */
/*
static int gp_cleanup_delay;
module_param(gp_cleanup_delay, int, 0444);
+ // Add delay to rcu_read_unlock() for strict grace periods.
+ static int rcu_unlock_delay;
+ #ifdef CONFIG_RCU_STRICT_GRACE_PERIOD
+ module_param(rcu_unlock_delay, int, 0444);
+ #endif
+
/*
* This rcu parameter is runtime-read-only. It reflects
* a minimum allowed number of objects which can be cached
return __this_cpu_read(rcu_data.dynticks_nesting) == 0;
}
- #define DEFAULT_RCU_BLIMIT 10 /* Maximum callbacks per rcu_do_batch ... */
- #define DEFAULT_MAX_RCU_BLIMIT 10000 /* ... even during callback flood. */
+ #define DEFAULT_RCU_BLIMIT (IS_ENABLED(CONFIG_RCU_STRICT_GRACE_PERIOD) ? 1000 : 10)
+ // Maximum callbacks per rcu_do_batch ...
+ #define DEFAULT_MAX_RCU_BLIMIT 10000 // ... even during callback flood.
static long blimit = DEFAULT_RCU_BLIMIT;
- #define DEFAULT_RCU_QHIMARK 10000 /* If this many pending, ignore blimit. */
+ #define DEFAULT_RCU_QHIMARK 10000 // If this many pending, ignore blimit.
static long qhimark = DEFAULT_RCU_QHIMARK;
- #define DEFAULT_RCU_QLOMARK 100 /* Once only this many pending, use blimit. */
+ #define DEFAULT_RCU_QLOMARK 100 // Once only this many pending, use blimit.
static long qlowmark = DEFAULT_RCU_QLOMARK;
#define DEFAULT_RCU_QOVLD_MULT 2
#define DEFAULT_RCU_QOVLD (DEFAULT_RCU_QOVLD_MULT * DEFAULT_RCU_QHIMARK)
- static long qovld = DEFAULT_RCU_QOVLD; /* If this many pending, hammer QS. */
- static long qovld_calc = -1; /* No pre-initialization lock acquisitions! */
+ static long qovld = DEFAULT_RCU_QOVLD; // If this many pending, hammer QS.
+ static long qovld_calc = -1; // No pre-initialization lock acquisitions!
module_param(blimit, long, 0444);
module_param(qhimark, long, 0444);
module_param(qlowmark, long, 0444);
module_param(qovld, long, 0444);
- static ulong jiffies_till_first_fqs = ULONG_MAX;
+ static ulong jiffies_till_first_fqs = IS_ENABLED(CONFIG_RCU_STRICT_GRACE_PERIOD) ? 0 : ULONG_MAX;
static ulong jiffies_till_next_fqs = ULONG_MAX;
static bool rcu_kick_kthreads;
static int rcu_divisor = 7;
}
}
- noinstr bool __rcu_is_watching(void)
- {
- return !rcu_dynticks_curr_cpu_in_eqs();
- }
-
/**
* rcu_is_watching - see if RCU thinks that the current CPU is not idle
*
return 1;
}
- /* If waiting too long on an offline CPU, complain. */
- if (!(rdp->grpmask & rcu_rnp_online_cpus(rnp)) &&
- time_after(jiffies, rcu_state.gp_start + HZ)) {
+ /*
+ * Complain if a CPU that is considered to be offline from RCU's
+ * perspective has not yet reported a quiescent state. After all,
+ * the offline CPU should have reported a quiescent state during
+ * the CPU-offline process, or, failing that, by rcu_gp_init()
+ * if it ran concurrently with either the CPU going offline or the
+ * last task on a leaf rcu_node structure exiting its RCU read-side
+ * critical section while all CPUs corresponding to that structure
+ * are offline. This added warning detects bugs in any of these
+ * code paths.
+ *
+ * The rcu_node structure's ->lock is held here, which excludes
+ * the relevant portions the CPU-hotplug code, the grace-period
+ * initialization code, and the rcu_read_unlock() code paths.
+ *
+ * For more detail, please refer to the "Hotplug CPU" section
+ * of RCU's Requirements documentation.
+ */
+ if (WARN_ON_ONCE(!(rdp->grpmask & rcu_rnp_online_cpus(rnp)))) {
bool onl;
struct rcu_node *rnp1;
- WARN_ON(1); /* Offline CPUs are supposed to report QS! */
pr_info("%s: grp: %d-%d level: %d ->gp_seq %ld ->completedqs %ld\n",
__func__, rnp->grplo, rnp->grphi, rnp->level,
(long)rnp->gp_seq, (long)rnp->completedqs);
/* Trace depending on how much we were able to accelerate. */
if (rcu_segcblist_restempty(&rdp->cblist, RCU_WAIT_TAIL))
- trace_rcu_grace_period(rcu_state.name, rdp->gp_seq, TPS("AccWaitCB"));
+ trace_rcu_grace_period(rcu_state.name, gp_seq_req, TPS("AccWaitCB"));
else
- trace_rcu_grace_period(rcu_state.name, rdp->gp_seq, TPS("AccReadyCB"));
+ trace_rcu_grace_period(rcu_state.name, gp_seq_req, TPS("AccReadyCB"));
+
return ret;
}
raw_spin_unlock_rcu_node(rnp);
}
+ /*
+ * In CONFIG_RCU_STRICT_GRACE_PERIOD=y kernels, attempt to generate a
+ * quiescent state. This is intended to be invoked when the CPU notices
+ * a new grace period.
+ */
+ static void rcu_strict_gp_check_qs(void)
+ {
+ if (IS_ENABLED(CONFIG_RCU_STRICT_GRACE_PERIOD)) {
+ rcu_read_lock();
+ rcu_read_unlock();
+ }
+ }
+
/*
* Update CPU-local rcu_data state to record the beginnings and ends of
* grace periods. The caller must hold the ->lock of the leaf rcu_node
}
needwake = __note_gp_changes(rnp, rdp);
raw_spin_unlock_irqrestore_rcu_node(rnp, flags);
+ rcu_strict_gp_check_qs();
if (needwake)
rcu_gp_kthread_wake();
}
}
}
+ /*
+ * Handler for on_each_cpu() to invoke the target CPU's RCU core
+ * processing.
+ */
+ static void rcu_strict_gp_boundary(void *unused)
+ {
+ invoke_rcu_core();
+ }
+
/*
* Initialize a new grace period. Return false if no grace period required.
*/
raw_spin_unlock_irq_rcu_node(rnp);
/*
- * Apply per-leaf buffered online and offline operations to the
- * rcu_node tree. Note that this new grace period need not wait
- * for subsequent online CPUs, and that quiescent-state forcing
- * will handle subsequent offline CPUs.
+ * Apply per-leaf buffered online and offline operations to
+ * the rcu_node tree. Note that this new grace period need not
+ * wait for subsequent online CPUs, and that RCU hooks in the CPU
+ * offlining path, when combined with checks in this function,
+ * will handle CPUs that are currently going offline or that will
+ * go offline later. Please also refer to "Hotplug CPU" section
+ * of RCU's Requirements documentation.
*/
rcu_state.gp_state = RCU_GP_ONOFF;
rcu_for_each_leaf_node(rnp) {
WRITE_ONCE(rcu_state.gp_activity, jiffies);
}
+ // If strict, make all CPUs aware of new grace period.
+ if (IS_ENABLED(CONFIG_RCU_STRICT_GRACE_PERIOD))
+ on_each_cpu(rcu_strict_gp_boundary, NULL, 0);
+
return true;
}
break;
/* If time for quiescent-state forcing, do it. */
if (!time_after(rcu_state.jiffies_force_qs, jiffies) ||
- (gf & RCU_GP_FLAG_FQS)) {
+ (gf & (RCU_GP_FLAG_FQS | RCU_GP_FLAG_OVLD))) {
trace_rcu_grace_period(rcu_state.name, rcu_state.gp_seq,
TPS("fqsstart"));
rcu_gp_fqs(first_gp_fqs);
rcu_state.gp_flags & RCU_GP_FLAG_INIT);
}
raw_spin_unlock_irq_rcu_node(rnp);
+
+ // If strict, make all CPUs aware of the end of the old grace period.
+ if (IS_ENABLED(CONFIG_RCU_STRICT_GRACE_PERIOD))
+ on_each_cpu(rcu_strict_gp_boundary, NULL, 0);
}
/*
* structure. This must be called from the specified CPU.
*/
static void
- rcu_report_qs_rdp(int cpu, struct rcu_data *rdp)
+ rcu_report_qs_rdp(struct rcu_data *rdp)
{
unsigned long flags;
unsigned long mask;
rcu_segcblist_is_offloaded(&rdp->cblist);
struct rcu_node *rnp;
+ WARN_ON_ONCE(rdp->cpu != smp_processor_id());
rnp = rdp->mynode;
raw_spin_lock_irqsave_rcu_node(rnp, flags);
if (rdp->cpu_no_qs.b.norm || rdp->gp_seq != rnp->gp_seq ||
return;
}
mask = rdp->grpmask;
- if (rdp->cpu == smp_processor_id())
- rdp->core_needs_qs = false;
+ rdp->core_needs_qs = false;
if ((rnp->qsmask & mask) == 0) {
raw_spin_unlock_irqrestore_rcu_node(rnp, flags);
} else {
* Tell RCU we are done (but rcu_report_qs_rdp() will be the
* judge of that).
*/
- rcu_report_qs_rdp(rdp->cpu, rdp);
+ rcu_report_qs_rdp(rdp);
}
/*
*/
static void rcu_do_batch(struct rcu_data *rdp)
{
+ int div;
unsigned long flags;
const bool offloaded = IS_ENABLED(CONFIG_RCU_NOCB_CPU) &&
rcu_segcblist_is_offloaded(&rdp->cblist);
rcu_nocb_lock(rdp);
WARN_ON_ONCE(cpu_is_offline(smp_processor_id()));
pending = rcu_segcblist_n_cbs(&rdp->cblist);
- bl = max(rdp->blimit, pending >> rcu_divisor);
- if (unlikely(bl > 100))
- tlimit = local_clock() + rcu_resched_ns;
+ div = READ_ONCE(rcu_divisor);
+ div = div < 0 ? 7 : div > sizeof(long) * 8 - 2 ? sizeof(long) * 8 - 2 : div;
+ bl = max(rdp->blimit, pending >> div);
+ if (unlikely(bl > 100)) {
+ long rrn = READ_ONCE(rcu_resched_ns);
+
+ rrn = rrn < NSEC_PER_MSEC ? NSEC_PER_MSEC : rrn > NSEC_PER_SEC ? NSEC_PER_SEC : rrn;
+ tlimit = local_clock() + rrn;
+ }
trace_rcu_batch_start(rcu_state.name,
rcu_segcblist_n_cbs(&rdp->cblist), bl);
rcu_segcblist_extract_done_cbs(&rdp->cblist, &rcl);
raw_spin_lock_irqsave_rcu_node(rnp, flags);
rcu_state.cbovldnext |= !!rnp->cbovldmask;
if (rnp->qsmask == 0) {
- if (!IS_ENABLED(CONFIG_PREEMPT_RCU) ||
- rcu_preempt_blocked_readers_cgp(rnp)) {
+ if (rcu_preempt_blocked_readers_cgp(rnp)) {
/*
* No point in scanning bits because they
* are all zero. But we might need to
}
EXPORT_SYMBOL_GPL(rcu_force_quiescent_state);
+ // Workqueue handler for an RCU reader for kernels enforcing struct RCU
+ // grace periods.
+ static void strict_work_handler(struct work_struct *work)
+ {
+ rcu_read_lock();
+ rcu_read_unlock();
+ }
+
/* Perform RCU core processing work for the current CPU. */
static __latent_entropy void rcu_core(void)
{
/* Do any needed deferred wakeups of rcuo kthreads. */
do_nocb_deferred_wakeup(rdp);
trace_rcu_utilization(TPS("End RCU core"));
+
+ // If strict GPs, schedule an RCU reader in a clean environment.
+ if (IS_ENABLED(CONFIG_RCU_STRICT_GRACE_PERIOD))
+ queue_work_on(rdp->cpu, rcu_gp_wq, &rdp->strict_work);
}
static void rcu_core_si(struct softirq_action *h)
* @monitor_todo: Tracks whether a @monitor_work delayed work is pending
* @initialized: The @rcu_work fields have been initialized
* @count: Number of objects for which GP not started
+ * @bkvcache:
+ * A simple cache list that contains objects for reuse purpose.
+ * In order to save some per-cpu space the list is singular.
+ * Even though it is lockless an access has to be protected by the
+ * per-cpu lock.
+ * @nr_bkv_objs: number of allocated objects at @bkvcache.
*
* This is a per-CPU structure. The reason that it is not included in
* the rcu_data structure is to permit this code to be extracted from
bool monitor_todo;
bool initialized;
int count;
-
- /*
- * A simple cache list that contains objects for
- * reuse purpose. In order to save some per-cpu
- * space the list is singular. Even though it is
- * lockless an access has to be protected by the
- * per-cpu lock.
- */
struct llist_head bkvcache;
int nr_bkv_objs;
};
unsigned long count = 0;
/* Snapshot count of all CPUs */
- for_each_online_cpu(cpu) {
+ for_each_possible_cpu(cpu) {
struct kfree_rcu_cpu *krcp = per_cpu_ptr(&krc, cpu);
count += READ_ONCE(krcp->count);
int cpu, freed = 0;
unsigned long flags;
- for_each_online_cpu(cpu) {
+ for_each_possible_cpu(cpu) {
int count;
struct kfree_rcu_cpu *krcp = per_cpu_ptr(&krc, cpu);
int cpu;
unsigned long flags;
- for_each_online_cpu(cpu) {
+ for_each_possible_cpu(cpu) {
struct kfree_rcu_cpu *krcp = per_cpu_ptr(&krc, cpu);
raw_spin_lock_irqsave(&krcp->lock, flags);
/* Set up local state, ensuring consistent view of global state. */
rdp->grpmask = leaf_node_cpu_bit(rdp->mynode, cpu);
+ INIT_WORK(&rdp->strict_work, strict_work_handler);
WARN_ON_ONCE(rdp->dynticks_nesting != 1);
WARN_ON_ONCE(rcu_dynticks_in_eqs(rcu_dynticks_snap(rdp)));
rdp->rcu_ofl_gp_seq = rcu_state.gp_seq;
return 0;
}
- static DEFINE_PER_CPU(int, rcu_cpu_started);
-
/*
* Mark the specified CPU as being online so that subsequent grace periods
* (both expedited and normal) will wait on it. Note that this means that
struct rcu_node *rnp;
bool newcpu;
- if (per_cpu(rcu_cpu_started, cpu))
+ rdp = per_cpu_ptr(&rcu_data, cpu);
+ if (rdp->cpu_started)
return;
+ rdp->cpu_started = true;
- per_cpu(rcu_cpu_started, cpu) = 1;
-
- rdp = per_cpu_ptr(&rcu_data, cpu);
rnp = rdp->mynode;
mask = rdp->grpmask;
raw_spin_lock_irqsave_rcu_node(rnp, flags);
raw_spin_unlock_irqrestore_rcu_node(rnp, flags);
raw_spin_unlock(&rcu_state.ofl_lock);
- per_cpu(rcu_cpu_started, cpu) = 0;
+ rdp->cpu_started = false;
}
/*
#endif
#define MODULE_PARAM_PREFIX "rcupdate."
- #ifndef data_race
- #define data_race(expr) \
- ({ \
- expr; \
- })
- #endif
- #ifndef ASSERT_EXCLUSIVE_WRITER
- #define ASSERT_EXCLUSIVE_WRITER(var) do { } while (0)
- #endif
- #ifndef ASSERT_EXCLUSIVE_ACCESS
- #define ASSERT_EXCLUSIVE_ACCESS(var) do { } while (0)
- #endif
-
#ifndef CONFIG_TINY_RCU
module_param(rcu_expedited, int, 0);
module_param(rcu_normal, int, 0);
}
EXPORT_SYMBOL_GPL(destroy_rcu_head_on_stack);
-struct debug_obj_descr rcuhead_debug_descr = {
+const struct debug_obj_descr rcuhead_debug_descr = {
.name = "rcu_head",
.is_static_object = rcuhead_is_static_object,
};
#include <linux/sched.h>
#include <linux/sched/idle.h>
#include <linux/hypervisor.h>
+ #include <linux/sched/clock.h>
+ #include <linux/nmi.h>
+ #include <linux/sched/debug.h>
#include "smpboot.h"
#include "sched/smp.h"
smpcfd_prepare_cpu(smp_processor_id());
}
+ #ifdef CONFIG_CSD_LOCK_WAIT_DEBUG
+
+ static DEFINE_PER_CPU(call_single_data_t *, cur_csd);
+ static DEFINE_PER_CPU(smp_call_func_t, cur_csd_func);
+ static DEFINE_PER_CPU(void *, cur_csd_info);
+
+ #define CSD_LOCK_TIMEOUT (5ULL * NSEC_PER_SEC)
+ static atomic_t csd_bug_count = ATOMIC_INIT(0);
+
+ /* Record current CSD work for current CPU, NULL to erase. */
+ static void csd_lock_record(call_single_data_t *csd)
+ {
+ if (!csd) {
+ smp_mb(); /* NULL cur_csd after unlock. */
+ __this_cpu_write(cur_csd, NULL);
+ return;
+ }
+ __this_cpu_write(cur_csd_func, csd->func);
+ __this_cpu_write(cur_csd_info, csd->info);
+ smp_wmb(); /* func and info before csd. */
+ __this_cpu_write(cur_csd, csd);
+ smp_mb(); /* Update cur_csd before function call. */
+ /* Or before unlock, as the case may be. */
+ }
+
+ static __always_inline int csd_lock_wait_getcpu(call_single_data_t *csd)
+ {
+ unsigned int csd_type;
+
+ csd_type = CSD_TYPE(csd);
+ if (csd_type == CSD_TYPE_ASYNC || csd_type == CSD_TYPE_SYNC)
+ return csd->dst; /* Other CSD_TYPE_ values might not have ->dst. */
+ return -1;
+ }
+
+ /*
+ * Complain if too much time spent waiting. Note that only
+ * the CSD_TYPE_SYNC/ASYNC types provide the destination CPU,
+ * so waiting on other types gets much less information.
+ */
+ static __always_inline bool csd_lock_wait_toolong(call_single_data_t *csd, u64 ts0, u64 *ts1, int *bug_id)
+ {
+ int cpu = -1;
+ int cpux;
+ bool firsttime;
+ u64 ts2, ts_delta;
+ call_single_data_t *cpu_cur_csd;
+ unsigned int flags = READ_ONCE(csd->flags);
+
+ if (!(flags & CSD_FLAG_LOCK)) {
+ if (!unlikely(*bug_id))
+ return true;
+ cpu = csd_lock_wait_getcpu(csd);
+ pr_alert("csd: CSD lock (#%d) got unstuck on CPU#%02d, CPU#%02d released the lock.\n",
+ *bug_id, raw_smp_processor_id(), cpu);
+ return true;
+ }
+
+ ts2 = sched_clock();
+ ts_delta = ts2 - *ts1;
+ if (likely(ts_delta <= CSD_LOCK_TIMEOUT))
+ return false;
+
+ firsttime = !*bug_id;
+ if (firsttime)
+ *bug_id = atomic_inc_return(&csd_bug_count);
+ cpu = csd_lock_wait_getcpu(csd);
+ if (WARN_ONCE(cpu < 0 || cpu >= nr_cpu_ids, "%s: cpu = %d\n", __func__, cpu))
+ cpux = 0;
+ else
+ cpux = cpu;
+ cpu_cur_csd = smp_load_acquire(&per_cpu(cur_csd, cpux)); /* Before func and info. */
+ pr_alert("csd: %s non-responsive CSD lock (#%d) on CPU#%d, waiting %llu ns for CPU#%02d %pS(%ps).\n",
+ firsttime ? "Detected" : "Continued", *bug_id, raw_smp_processor_id(), ts2 - ts0,
+ cpu, csd->func, csd->info);
+ if (cpu_cur_csd && csd != cpu_cur_csd) {
+ pr_alert("\tcsd: CSD lock (#%d) handling prior %pS(%ps) request.\n",
+ *bug_id, READ_ONCE(per_cpu(cur_csd_func, cpux)),
+ READ_ONCE(per_cpu(cur_csd_info, cpux)));
+ } else {
+ pr_alert("\tcsd: CSD lock (#%d) %s.\n",
+ *bug_id, !cpu_cur_csd ? "unresponsive" : "handling this request");
+ }
+ if (cpu >= 0) {
+ if (!trigger_single_cpu_backtrace(cpu))
+ dump_cpu_task(cpu);
+ if (!cpu_cur_csd) {
+ pr_alert("csd: Re-sending CSD lock (#%d) IPI from CPU#%02d to CPU#%02d\n", *bug_id, raw_smp_processor_id(), cpu);
+ arch_send_call_function_single_ipi(cpu);
+ }
+ }
+ dump_stack();
+ *ts1 = ts2;
+
+ return false;
+ }
+
/*
* csd_lock/csd_unlock used to serialize access to per-cpu csd resources
*
* previous function call. For multi-cpu calls its even more interesting
* as we'll have to ensure no other cpu is observing our csd.
*/
+ static __always_inline void csd_lock_wait(call_single_data_t *csd)
+ {
+ int bug_id = 0;
+ u64 ts0, ts1;
+
+ ts1 = ts0 = sched_clock();
+ for (;;) {
+ if (csd_lock_wait_toolong(csd, ts0, &ts1, &bug_id))
+ break;
+ cpu_relax();
+ }
+ smp_acquire__after_ctrl_dep();
+ }
+
+ #else
+ static void csd_lock_record(call_single_data_t *csd)
+ {
+ }
+
static __always_inline void csd_lock_wait(call_single_data_t *csd)
{
smp_cond_load_acquire(&csd->flags, !(VAL & CSD_FLAG_LOCK));
}
+ #endif
static __always_inline void csd_lock(call_single_data_t *csd)
{
* We can unlock early even for the synchronous on-stack case,
* since we're doing this from the same CPU..
*/
+ csd_lock_record(csd);
csd_unlock(csd);
local_irq_save(flags);
func(info);
+ csd_lock_record(NULL);
local_irq_restore(flags);
return 0;
}
entry = &csd_next->llist;
}
+ csd_lock_record(csd);
func(info);
csd_unlock(csd);
+ csd_lock_record(NULL);
} else {
prev = &csd->llist;
}
smp_call_func_t func = csd->func;
void *info = csd->info;
+ csd_lock_record(csd);
csd_unlock(csd);
func(info);
+ csd_lock_record(NULL);
} else if (type == CSD_TYPE_IRQ_WORK) {
irq_work_single(csd);
}
csd->func = func;
csd->info = info;
+ #ifdef CONFIG_CSD_LOCK_WAIT_DEBUG
+ csd->src = smp_processor_id();
+ csd->dst = cpu;
+ #endif
err = generic_exec_single(cpu, csd);
csd->flags |= CSD_TYPE_SYNC;
csd->func = func;
csd->info = info;
+ #ifdef CONFIG_CSD_LOCK_WAIT_DEBUG
+ csd->src = smp_processor_id();
+ csd->dst = cpu;
+ #endif
if (llist_add(&csd->llist, &per_cpu(call_single_queue, cpu)))
__cpumask_set_cpu(cpu, cfd->cpumask_ipi);
}
* for all the required CPUs to finish. This may include the local
* processor.
* @cond_func: A callback function that is passed a cpu id and
- * the the info parameter. The function is called
+ * the info parameter. The function is called
* with preemption disabled. The function should
* return a blooean value indicating whether to IPI
* the specified CPU.
Say M if you want these self tests to build as a module.
Say N if you are unsure.
+ config SCF_TORTURE_TEST
+ tristate "torture tests for smp_call_function*()"
+ depends on DEBUG_KERNEL
+ select TORTURE_TEST
+ help
+ This option provides a kernel module that runs torture tests
+ on the smp_call_function() family of primitives. The kernel
+ module may be built after the fact on the running kernel to
+ be tested, if desired.
+
+ config CSD_LOCK_WAIT_DEBUG
+ bool "Debugging for csd_lock_wait(), called from smp_call_function*()"
+ depends on DEBUG_KERNEL
+ depends on 64BIT
+ default n
+ help
+ This option enables debug prints when CPUs are slow to respond
+ to the smp_call_function*() IPI wrappers. These debug prints
+ include the IPI handler function currently executing (if any)
+ and relevant stack traces.
+
endmenu # lock debugging
config TRACE_IRQFLAGS
help
Provide fault-injection capability for alloc_pages().
+config FAULT_INJECTION_USERCOPY
+ bool "Fault injection capability for usercopy functions"
+ depends on FAULT_INJECTION
+ help
+ Provides fault-injection capability to inject failures
+ in usercopy functions (copy_from_user(), get_user(), ...).
+
config FAIL_MAKE_REQUEST
bool "Fault-injection capability for disk IO"
depends on FAULT_INJECTION && BLOCK
If unsure, say N.
+config TEST_FREE_PAGES
+ tristate "Test freeing pages"
+ help
+ Test that a memory leak does not occur due to a race between
+ freeing a block of pages and a speculative page reference.
+ Loading this module is safe if your kernel has the bug fixed.
+ If the bug is not fixed, it will leak gigabytes of memory and
+ probably OOM your system.
+
config TEST_FPU
tristate "Test floating point operations in kernel space"
depends on X86 && !KCOV_INSTRUMENT_ALL
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