F: include/linux/acpi_viot.h
ACPI WMI DRIVER
-S: Orphan
+S: Maintained
F: Documentation/driver-api/wmi.rst
F: Documentation/wmi/
F: drivers/platform/x86/wmi.c
ADM8211 WIRELESS DRIVER
S: Orphan
-W: https://wireless.wiki.kernel.org/
F: drivers/net/wireless/admtek/adm8211.*
ADP1653 FLASH CONTROLLER DRIVER
APPLETALK NETWORK LAYER
S: Odd fixes
-F: drivers/net/appletalk/
F: include/linux/atalk.h
F: include/uapi/linux/atalk.h
F: net/appletalk/
F: arch/arm64/include/asm/arch_timer.h
F: drivers/clocksource/arm_arch_timer.c
+ARM GENERIC INTERRUPT CONTROLLER DRIVERS
+S: Maintained
+F: Documentation/devicetree/bindings/interrupt-controller/arm,gic*
+F: arch/arm/include/asm/arch_gicv3.h
+F: arch/arm64/include/asm/arch_gicv3.h
+F: drivers/irqchip/irq-gic*.[ch]
+F: include/linux/irqchip/arm-gic*.h
+F: include/linux/irqchip/arm-vgic-info.h
+
ARM HDLCD DRM DRIVER
S: Supported
F: drivers/gpu/drm/arm/display/komeda/
ARM MALI PANFROST DRM DRIVER
S: Supported
T: git git://anongit.freedesktop.org/drm/drm-misc
+F: Documentation/gpu/panfrost.rst
F: drivers/gpu/drm/panfrost/
F: include/uapi/drm/panfrost_drm.h
F: arch/arm*/kernel/hw_breakpoint.c
F: arch/arm*/kernel/perf_*
F: drivers/perf/
-F: include/linux/perf/arm_pmu.h
+F: include/linux/perf/arm_pmu*.h
ARM PORT
ARM/ASPEED MACHINE SUPPORT
-R: Andrew Jeffery <andrew@aj.id.au>
+R: Andrew Jeffery <andrew@codeconstruct.com.au>
S: Supported
Q: https://patchwork.ozlabs.org/project/linux-aspeed/list/
-T: git git://git.kernel.org/pub/scm/linux/kernel/git/joel/aspeed.git
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/joel/bmc.git
F: Documentation/devicetree/bindings/arm/aspeed/
F: arch/arm/boot/dts/aspeed/
F: arch/arm/mach-aspeed/
ARM/INTEL IXP4XX ARM ARCHITECTURE
S: Maintained
F: Documentation/devicetree/bindings/arm/intel-ixp4xx.yaml
-F: Documentation/devicetree/bindings/gpio/intel,ixp4xx-gpio.txt
+F: Documentation/devicetree/bindings/gpio/intel,ixp4xx-gpio.yaml
F: Documentation/devicetree/bindings/interrupt-controller/intel,ixp4xx-interrupt.yaml
F: Documentation/devicetree/bindings/memory-controllers/intel,ixp4xx-expansion*
+F: Documentation/devicetree/bindings/rng/intel,ixp46x-rng.yaml
F: Documentation/devicetree/bindings/timer/intel,ixp4xx-timer.yaml
F: arch/arm/boot/dts/intel/ixp/
F: arch/arm/mach-ixp4xx/
F: drivers/bus/intel-ixp4xx-eb.c
+F: drivers/char/hw_random/ixp4xx-rng.c
F: drivers/clocksource/timer-ixp4xx.c
F: drivers/crypto/intel/ixp4xx/ixp4xx_crypto.c
F: drivers/gpio/gpio-ixp4xx.c
F: drivers/irqchip/irq-ixp4xx.c
+F: drivers/net/ethernet/xscale/ixp4xx_eth.c
+F: drivers/net/wan/ixp4xx_hss.c
+F: drivers/soc/ixp4xx/ixp4xx-npe.c
+F: drivers/soc/ixp4xx/ixp4xx-qmgr.c
+F: include/linux/soc/ixp4xx/npe.h
+F: include/linux/soc/ixp4xx/qmgr.h
ARM/INTEL KEEMBAY ARCHITECTURE
ARM/Mediatek SoC support
F: drivers/peci/controller/peci-aspeed.c
ASPEED PINCTRL DRIVERS
-M: Andrew Jeffery <andrew@aj.id.au>
+M: Andrew Jeffery <andrew@codeconstruct.com.au>
F: include/dt-bindings/interrupt-controller/aspeed-scu-ic.h
ASPEED SD/MMC DRIVER
-M: Andrew Jeffery <andrew@aj.id.au>
+M: Andrew Jeffery <andrew@codeconstruct.com.au>
S: Maintained
-W: http://www.linux-ax25.org/
+W: https://linux-ax25.in-berlin.de
F: include/net/ax25.h
F: include/uapi/linux/ax25.h
F: net/ax25/
C: irc://irc.oftc.net/bcache
F: drivers/md/bcache/
+BCACHEFS
+S: Supported
+C: irc://irc.oftc.net/bcache
+F: fs/bcachefs/
+
BDISP ST MEDIA DRIVER
F: drivers/iio/accel/bma400*
BPF JIT for ARM
-S: Odd Fixes
+S: Maintained
F: arch/arm/net/
BPF JIT for ARM64
S: Odd Fixes
K: (?:\b|_)bpf(?:\b|_)
+BPF [NETKIT] (BPF-programmable network device)
+S: Supported
+F: drivers/net/netkit.c
+F: include/net/netkit.h
+
BPF [NETWORKING] (struct_ops, reuseport)
BROADCOM BRCMSTB GPIO DRIVER
-M: Florian Fainelli <florian.fainelli@broadcom>
+M: Florian Fainelli <florian.fainelli@broadcom.com>
S: Supported
F: Documentation/devicetree/bindings/gpio/brcm,brcmstb-gpio.yaml
F: drivers/net/ethernet/broadcom/unimac.h
BROADCOM TG3 GIGABIT ETHERNET DRIVER
S: Supported
X: drivers/char/random.c
X: drivers/char/tpm/
+CHARGERLAB POWER-Z HARDWARE MONITOR DRIVER
+S: Maintained
+F: Documentation/hwmon/powerz.rst
+F: drivers/hwmon/powerz.c
+
CHECKPATCH
F: Documentation/devicetree/bindings/timer/
F: drivers/clocksource/
+CLOSURES
+S: Supported
+C: irc://irc.oftc.net/bcache
+F: include/linux/closure.h
+F: lib/closure.c
+
CMPC ACPI DRIVER
S: Maintained
F: drivers/i2c/busses/i2c-cp2615.c
-CPMAC ETHERNET DRIVER
-S: Maintained
-F: drivers/net/ethernet/ti/cpmac.c
-
CPU FREQUENCY DRIVERS - VEXPRESS SPC ARM BIG LITTLE
DEVICE-MAPPER (LVM)
S: Maintained
S: Maintained
T: git git://anongit.freedesktop.org/drm/drm-misc
F: Documentation/driver-api/dma-buf.rst
+F: Documentation/userspace-api/dma-buf-alloc-exchange.rst
F: drivers/dma-buf/
F: include/linux/*fence.h
F: include/linux/dma-buf.h
F: drivers/net/ethernet/freescale/dpaa2/dpaa2-switch*
F: drivers/net/ethernet/freescale/dpaa2/dpsw*
+DPLL SUBSYSTEM
+S: Supported
+F: Documentation/driver-api/dpll.rst
+F: drivers/dpll/*
+F: include/linux/dpll.h
+F: include/uapi/linux/dpll.h
+
DRBD DRIVER
B: https://gitlab.freedesktop.org/drm/msm/-/issues
T: git https://gitlab.freedesktop.org/drm/msm.git
F: Documentation/devicetree/bindings/display/msm/
+F: drivers/gpu/drm/ci/xfails/msm*
F: drivers/gpu/drm/msm/
F: include/uapi/drm/msm_drm.h
F: drivers/gpu/drm/panel/panel-novatek-nt36672a.c
DRM DRIVER FOR NVIDIA GEFORCE/QUADRO GPUS
S: Supported
DRM DRIVER FOR SITRONIX ST7703 PANELS
S: Maintained
F: Documentation/devicetree/bindings/display/panel/rocktech,jh057n00900.yaml
F: drivers/gpu/drm/panel/panel-sitronix-st7703.c
S: Maintained
T: git git://anongit.freedesktop.org/drm/drm-misc
-F: Documentation/devicetree/bindings/display/solomon,ssd1307fb.yaml
+F: Documentation/devicetree/bindings/display/solomon,ssd-common.yaml
+F: Documentation/devicetree/bindings/display/solomon,ssd13*.yaml
F: drivers/gpu/drm/solomon/ssd130x*
DRM DRIVER FOR ST-ERICSSON MCDE
S: Maintained
W: https://01.org/linuxgraphics/gfx-docs/maintainer-tools/drm-misc.html
T: git git://anongit.freedesktop.org/drm/drm-misc
+F: Documentation/devicetree/bindings/display/
+F: Documentation/devicetree/bindings/gpu/
F: Documentation/gpu/
-F: drivers/gpu/drm/*
+F: drivers/gpu/drm/
F: drivers/gpu/vga/
-F: include/drm/drm*
+F: include/drm/drm
F: include/linux/vga*
-F: include/uapi/drm/drm*
+F: include/uapi/drm/
+X: drivers/gpu/drm/amd/
+X: drivers/gpu/drm/armada/
+X: drivers/gpu/drm/etnaviv/
+X: drivers/gpu/drm/exynos/
+X: drivers/gpu/drm/i915/
+X: drivers/gpu/drm/kmb/
+X: drivers/gpu/drm/mediatek/
+X: drivers/gpu/drm/msm/
+X: drivers/gpu/drm/nouveau/
+X: drivers/gpu/drm/radeon/
+X: drivers/gpu/drm/renesas/
+X: drivers/gpu/drm/tegra/
DRM DRIVERS FOR ALLWINNER A10
F: Documentation/devicetree/bindings/display/amlogic,meson-dw-hdmi.yaml
F: Documentation/devicetree/bindings/display/amlogic,meson-vpu.yaml
F: Documentation/gpu/meson.rst
+F: drivers/gpu/drm/ci/xfails/meson*
F: drivers/gpu/drm/meson/
DRM DRIVERS FOR ATMEL HLCDC
F: Documentation/devicetree/bindings/display/bridge/
F: drivers/gpu/drm/bridge/
F: drivers/gpu/drm/drm_bridge.c
+F: drivers/gpu/drm/drm_bridge_connector.c
F: include/drm/drm_bridge.h
+F: include/drm/drm_bridge_connector.h
DRM DRIVERS FOR EXYNOS
F: Documentation/devicetree/bindings/display/fsl,tcon.txt
F: drivers/gpu/drm/fsl-dcu/
-DRM DRIVERS FOR FREESCALE IMX
+DRM DRIVERS FOR FREESCALE IMX 5/6
S: Maintained
+T: git git://anongit.freedesktop.org/drm/drm-misc
+T: git git://git.pengutronix.de/git/pza/linux
F: Documentation/devicetree/bindings/display/imx/
F: drivers/gpu/drm/imx/ipuv3/
F: drivers/gpu/ipu-v3/
S: Maintained
-T: git git://github.com/patjak/drm-gma500
+T: git git://anongit.freedesktop.org/drm/drm-misc
F: drivers/gpu/drm/gma500/
DRM DRIVERS FOR HISILICON
S: Supported
F: Documentation/devicetree/bindings/display/mediatek/
+F: drivers/gpu/drm/ci/xfails/mediatek*
F: drivers/gpu/drm/mediatek/
F: drivers/phy/mediatek/phy-mtk-dp.c
F: drivers/phy/mediatek/phy-mtk-hdmi*
S: Maintained
T: git git://anongit.freedesktop.org/drm/drm-misc
F: Documentation/devicetree/bindings/display/rockchip/
+F: drivers/gpu/drm/ci/xfails/rockchip*
F: drivers/gpu/drm/rockchip/
DRM DRIVERS FOR STI
F: drivers/gpu/drm/xlnx/
DRM GPU SCHEDULER
-M: Luben Tuikov <luben.tuikov@amd.com>
+M: Luben Tuikov <ltuikov89@gmail.com>
S: Maintained
T: git git://anongit.freedesktop.org/drm/drm-misc
DRM PANEL DRIVERS
S: Maintained
FIRMWARE LOADER (request_firmware)
S: Maintained
F: Documentation/firmware_class/
S: Maintained
T: git git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git for-next/hardening
F: Documentation/kbuild/gcc-plugins.rst
+F: include/linux/stackleak.h
+F: kernel/stackleak.c
F: scripts/Makefile.gcc-plugins
F: scripts/gcc-plugins/
T: git git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/linux-pm.git
F: drivers/pmdomain/
+GENERIC RADIX TREE
+S: Supported
+C: irc://irc.oftc.net/bcache
+F: include/linux/generic-radix-tree.h
+F: lib/generic-radix-tree.c
+
GENERIC RESISTIVE TOUCHSCREEN ADC DRIVER
F: tools/testing/selftests/gpio/
GPIO REGMAP
S: Maintained
F: drivers/gpio/gpio-regmap.c
F: include/linux/gpio/regmap.h
F: Documentation/ABI/testing/debugfs-driver-habanalabs
F: Documentation/ABI/testing/sysfs-driver-habanalabs
F: drivers/accel/habanalabs/
+F: include/linux/habanalabs/
F: include/trace/events/habanalabs.h
F: include/uapi/drm/habanalabs_accel.h
F: drivers/iio/pressure/mprls0025pa.c
HOST AP DRIVER
S: Obsolete
-W: http://w1.fi/hostap-driver.html
F: drivers/net/wireless/intersil/hostap/
HP BIOSCFG DRIVER
INTEL BIOS SAR INT1092 DRIVER
S: Maintained
F: drivers/platform/x86/intel/int1092/
T: git git://anongit.freedesktop.org/drm-intel
F: Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon
F: Documentation/gpu/i915.rst
+F: drivers/gpu/drm/ci/xfails/i915*
F: drivers/gpu/drm/i915/
F: include/drm/i915*
F: include/uapi/drm/i915_drm.h
S: Maintained
F: drivers/crypto/intel/ixp4xx/ixp4xx_crypto.c
-INTEL IXP4XX QMGR, NPE, ETHERNET and HSS SUPPORT
-S: Maintained
-F: drivers/net/ethernet/xscale/ixp4xx_eth.c
-F: drivers/net/wan/ixp4xx_hss.c
-F: drivers/soc/ixp4xx/ixp4xx-npe.c
-F: drivers/soc/ixp4xx/ixp4xx-qmgr.c
-F: include/linux/soc/ixp4xx/npe.h
-F: include/linux/soc/ixp4xx/qmgr.h
-
-INTEL IXP4XX RANDOM NUMBER GENERATOR SUPPORT
-S: Maintained
-F: Documentation/devicetree/bindings/rng/intel,ixp46x-rng.yaml
-F: drivers/char/hw_random/ixp4xx-rng.c
-
INTEL KEEM BAY DRM DRIVER
F: include/linux/mfd/intel-m10-bmc.h
INTEL MAX10 BMC SECURE UPDATES
-M: Russ Weight <russell.h.weight@intel.com>
+M: Peter Colberg <peter.colberg@intel.com>
S: Maintained
F: Documentation/ABI/testing/sysfs-driver-intel-m10-bmc-sec-update
INTEL WWAN IOSM DRIVER
S: Maintained
F: drivers/net/wwan/iosm/
F: sound/soc/codecs/sma*
IRQ DOMAINS (IRQ NUMBER MAPPING LIBRARY)
S: Maintained
T: git git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git irq/core
F: Documentation/core-api/irq/irq-domain.rst
IRQCHIP DRIVERS
S: Maintained
T: git git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git irq/core
KERNEL HARDENING (not covered by other areas)
S: Supported
T: git git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git for-next/hardening
F: Documentation/ABI/testing/sysfs-kernel-oops_count
F: Documentation/ABI/testing/sysfs-kernel-warn_count
+F: arch/*/configs/hardening.config
F: include/linux/overflow.h
F: include/linux/randomize_kstack.h
+F: kernel/configs/hardening.config
F: mm/usercopy.c
K: \b(add|choose)_random_kstack_offset\b
K: \b__check_(object_size|heap_object)\b
+K: \b__counted_by\b
KERNEL JANITORS
F: drivers/hwmon/ltc2947-spi.c
F: drivers/hwmon/ltc2947.h
+LTC2991 HARDWARE MONITOR DRIVER
+S: Supported
+W: https://ez.analog.com/linux-software-drivers
+F: Documentation/devicetree/bindings/hwmon/adi,ltc2991.yaml
+F: drivers/hwmon/ltc2991.c
+
LTC2983 IIO TEMPERATURE DRIVER
MEDIATEK T7XX 5G WWAN MODEM DRIVER
MEGACHIPS STDPXXXX-GE-B850V3-FW LVDS/DP++ BRIDGES
S: Maintained
F: Documentation/devicetree/bindings/display/bridge/megachips-stdpxxxx-ge-b850v3-fw.txt
MELLANOX HARDWARE PLATFORM SUPPORT
F: drivers/staging/media/meson/vdec/
METHODE UDPU SUPPORT
-M: Vladimir Vid <vladimir.vid@sartura.hr>
+M: Robert Marko <robert.marko@sartura.hr>
S: Maintained
-F: arch/arm64/boot/dts/marvell/armada-3720-uDPU.dts
+F: arch/arm64/boot/dts/marvell/armada-3720-eDPU.dts
+F: arch/arm64/boot/dts/marvell/armada-3720-uDPU.*
MHI BUS
MICROSOFT SURFACE HARDWARE PLATFORM SUPPORT
S: Maintained
+F: Documentation/devicetree/bindings/*/loongson,ls1*.yaml
F: arch/mips/include/asm/mach-loongson32/
F: arch/mips/loongson32/
F: drivers/*/*loongson1*
+F: drivers/net/ethernet/stmicro/stmmac/dwmac-loongson1.c
MIPS/LOONGSON2EF ARCHITECTURE
T: git git://linuxtv.org/media_tree.git
F: drivers/media/radio/radio-miropcm20*
+MITSUMI MM8013 FG DRIVER
+F: Documentation/devicetree/bindings/power/supply/mitsumi,mm8013.yaml
+F: drivers/power/supply/mm8013.c
+
MMP SUPPORT
S: Maintained
-W: http://www.linux-ax25.org/
+W: https://linux-ax25.in-berlin.de
F: include/net/netrom.h
F: include/uapi/linux/netrom.h
F: net/netrom/
K: \bmdo_
NETWORKING [MPTCP]
B: https://github.com/multipath-tcp/mptcp_net-next/issues
T: git https://github.com/multipath-tcp/mptcp_net-next.git export-net
T: git https://github.com/multipath-tcp/mptcp_net-next.git export
+F: Documentation/netlink/specs/mptcp.yaml
F: Documentation/networking/mptcp-sysctl.rst
F: include/net/mptcp.h
F: include/trace/events/mptcp.h
-F: include/uapi/linux/mptcp.h
+F: include/uapi/linux/mptcp*.h
F: net/mptcp/
F: tools/testing/selftests/bpf/*/*mptcp*.c
F: tools/testing/selftests/net/mptcp/
S: Maintained
-T: git git://git.kernel.org/pub/scm/linux/kernel/git/wtarreau/nolibc.git
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/nolibc/linux-nolibc.git
F: tools/include/nolibc/
F: tools/testing/selftests/nolibc/
S: Maintained
+T: git git://anongit.freedesktop.org/drm/drm-misc
F: Documentation/devicetree/bindings/display/imx/nxp,imx8mq-dcss.yaml
F: drivers/gpu/drm/imx/dcss/
F: drivers/of/
F: include/linux/of*.h
F: scripts/dtc/
+F: tools/testing/selftests/dt/
K: of_overlay_notifier_
K: of_overlay_fdt_apply
K: of_overlay_remove
S: Supported
+W: https://wireless.wiki.kernel.org/en/users/Drivers/ath12k
T: git git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/ath.git
F: drivers/net/wireless/ath/ath12k/
T: git https://gitlab.freedesktop.org/agd5f/linux.git
F: Documentation/gpu/amdgpu/
F: drivers/gpu/drm/amd/
+F: drivers/gpu/drm/ci/xfails/amd*
F: drivers/gpu/drm/radeon/
F: include/uapi/drm/amdgpu_drm.h
F: include/uapi/drm/radeon_drm.h
RALINK RT2X00 WIRELESS LAN DRIVER
S: Maintained
F: drivers/net/wireless/ralink/rt2x00/
S: Maintained
-W: https://wireless.wiki.kernel.org/
-T: git git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-testing.git
F: drivers/net/wireless/realtek/rtlwifi/
REALTEK WIRELESS DRIVER (rtw88)
S: Maintained
-W: http://www.linux-ax25.org/
+W: https://linux-ax25.in-berlin.de
F: include/net/rose.h
F: include/uapi/linux/rose.h
F: net/rose/
RTL8180 WIRELESS DRIVER
S: Orphan
-W: https://wireless.wiki.kernel.org/
F: drivers/net/wireless/realtek/rtl818x/rtl8180/
RTL8187 WIRELESS DRIVER
S: Maintained
-W: https://wireless.wiki.kernel.org/
F: drivers/net/wireless/realtek/rtl818x/rtl8187/
RTL8XXXU WIRELESS DRIVER (rtl8xxxu)
S: Maintained
-T: git git://git.kernel.org/pub/scm/linux/kernel/git/jes/linux.git rtl8xxxu-devel
F: drivers/net/wireless/realtek/rtl8xxxu/
RTRS TRANSPORT DRIVERS
S: Supported
-W: https://github.com/Rust-for-Linux/linux
+W: https://rust-for-linux.com
B: https://github.com/Rust-for-Linux/linux/issues
C: zulip://rust-for-linux.zulipchat.com
+P: https://rust-for-linux.com/contributing
T: git https://github.com/Rust-for-Linux/linux.git rust-next
F: Documentation/rust/
F: rust/
SFCTEMP HWMON DRIVER
S: Maintained
F: Documentation/devicetree/bindings/hwmon/starfive,jh71x0-temp.yaml
STARFIVE JH71X0 PINCTRL DRIVERS
S: Maintained
F: Documentation/devicetree/bindings/pinctrl/starfive,jh71*.yaml
THERMAL
S: Supported
Q: https://patchwork.kernel.org/project/linux-pm/list/
S: Orphan
W: https://wireless.wiki.kernel.org/en/users/Drivers/wl12xx
W: https://wireless.wiki.kernel.org/en/users/Drivers/wl1251
-T: git git://git.kernel.org/pub/scm/linux/kernel/git/luca/wl12xx.git
F: drivers/net/wireless/ti/
TIMEKEEPING, CLOCKSOURCE CORE, NTP, ALARMTIMER
S: Maintained
T: git git://anongit.freedesktop.org/drm/drm-misc
+F: drivers/gpu/drm/ci/xfails/virtio*
F: drivers/gpu/drm/virtio/
F: include/uapi/linux/virtio_gpu.h
F: drivers/scsi/vmw_pvscsi.h
VMWARE VIRTUAL PTP CLOCK DRIVER
-M: Deep Shah <sdeep@vmware.com>
+M: Jeff Sipek <jsipek@vmware.com>
X86 PLATFORM DRIVERS
S: Maintained
+Q: https://patchwork.kernel.org/project/platform-driver-x86/list/
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: drivers/gpio/gpio-xilinx.c
F: drivers/gpio/gpio-zynq.c
+XILINX LL TEMAC ETHERNET DRIVER
+S: Orphan
+F: drivers/net/ethernet/xilinx/ll_temac*
+
XILINX PWM DRIVER
S: Maintained
F: drivers/media/platform/xilinx/
F: include/uapi/linux/xilinx-v4l2-controls.h
+XILINX VERSAL EDAC DRIVER
+S: Maintained
+F: Documentation/devicetree/bindings/memory-controllers/xlnx,versal-ddrmc-edac.yaml
+F: drivers/edac/versal_edac.c
+
XILINX WATCHDOG DRIVER
dm_io_acct(io, true);
}
- static struct dm_io *alloc_io(struct mapped_device *md, struct bio *bio)
+ static struct dm_io *alloc_io(struct mapped_device *md, struct bio *bio, gfp_t gfp_mask)
{
struct dm_io *io;
struct dm_target_io *tio;
struct bio *clone;
- clone = bio_alloc_clone(NULL, bio, GFP_NOIO, &md->mempools->io_bs);
+ clone = bio_alloc_clone(NULL, bio, gfp_mask, &md->mempools->io_bs);
+ if (unlikely(!clone))
+ return NULL;
tio = clone_to_tio(clone);
tio->flags = 0;
dm_tio_set_flag(tio, DM_TIO_INSIDE_DM_IO);
dev_t dev, blk_mode_t mode)
{
struct table_device *td;
- struct block_device *bdev;
+ struct bdev_handle *bdev_handle;
u64 part_off;
int r;
return ERR_PTR(-ENOMEM);
refcount_set(&td->count, 1);
- bdev = blkdev_get_by_dev(dev, mode, _dm_claim_ptr, NULL);
- if (IS_ERR(bdev)) {
- r = PTR_ERR(bdev);
+ bdev_handle = bdev_open_by_dev(dev, mode, _dm_claim_ptr, NULL);
+ if (IS_ERR(bdev_handle)) {
+ r = PTR_ERR(bdev_handle);
goto out_free_td;
}
* called.
*/
if (md->disk->slave_dir) {
- r = bd_link_disk_holder(bdev, md->disk);
+ r = bd_link_disk_holder(bdev_handle->bdev, md->disk);
if (r)
goto out_blkdev_put;
}
td->dm_dev.mode = mode;
- td->dm_dev.bdev = bdev;
- td->dm_dev.dax_dev = fs_dax_get_by_bdev(bdev, &part_off, NULL, NULL);
+ td->dm_dev.bdev = bdev_handle->bdev;
+ td->dm_dev.bdev_handle = bdev_handle;
+ td->dm_dev.dax_dev = fs_dax_get_by_bdev(bdev_handle->bdev, &part_off,
+ NULL, NULL);
format_dev_t(td->dm_dev.name, dev);
list_add(&td->list, &md->table_devices);
return td;
out_blkdev_put:
- blkdev_put(bdev, _dm_claim_ptr);
+ bdev_release(bdev_handle);
out_free_td:
kfree(td);
return ERR_PTR(r);
{
if (md->disk->slave_dir)
bd_unlink_disk_holder(td->dm_dev.bdev, md->disk);
- blkdev_put(td->dm_dev.bdev, _dm_claim_ptr);
+ bdev_release(td->dm_dev.bdev_handle);
put_dax(td->dm_dev.dax_dev);
list_del(&td->list);
kfree(td);
*/
if (unlikely(dm_emulate_zone_append(md)))
r = dm_zone_map_bio(tio);
+ else
+ goto do_map;
+ } else {
+ do_map:
+ if (likely(ti->type->map == linear_map))
+ r = linear_map(ti, clone);
+ else if (ti->type->map == stripe_map)
+ r = stripe_map(ti, clone);
else
r = ti->type->map(ti, clone);
- } else
- r = ti->type->map(ti, clone);
+ }
switch (r) {
case DM_MAPIO_SUBMITTED:
static void alloc_multiple_bios(struct bio_list *blist, struct clone_info *ci,
struct dm_target *ti, unsigned int num_bios,
- unsigned *len)
+ unsigned *len, gfp_t gfp_flag)
{
struct bio *bio;
- int try;
+ int try = (gfp_flag & GFP_NOWAIT) ? 0 : 1;
- for (try = 0; try < 2; try++) {
+ for (; try < 2; try++) {
int bio_nr;
- if (try)
+ if (try && num_bios > 1)
mutex_lock(&ci->io->md->table_devices_lock);
for (bio_nr = 0; bio_nr < num_bios; bio_nr++) {
bio = alloc_tio(ci, ti, bio_nr, len,
bio_list_add(blist, bio);
}
- if (try)
+ if (try && num_bios > 1)
mutex_unlock(&ci->io->md->table_devices_lock);
if (bio_nr == num_bios)
return;
}
}
- static int __send_duplicate_bios(struct clone_info *ci, struct dm_target *ti,
- unsigned int num_bios, unsigned int *len)
+ static unsigned int __send_duplicate_bios(struct clone_info *ci, struct dm_target *ti,
+ unsigned int num_bios, unsigned int *len,
+ gfp_t gfp_flag)
{
struct bio_list blist = BIO_EMPTY_LIST;
struct bio *clone;
unsigned int ret = 0;
- switch (num_bios) {
- case 0:
- break;
- case 1:
- if (len)
- setup_split_accounting(ci, *len);
- clone = alloc_tio(ci, ti, 0, len, GFP_NOIO);
- __map_bio(clone);
- ret = 1;
- break;
- default:
- if (len)
- setup_split_accounting(ci, *len);
- /* dm_accept_partial_bio() is not supported with shared tio->len_ptr */
- alloc_multiple_bios(&blist, ci, ti, num_bios, len);
- while ((clone = bio_list_pop(&blist))) {
+ if (WARN_ON_ONCE(num_bios == 0)) /* num_bios = 0 is a bug in caller */
+ return 0;
+
+ /* dm_accept_partial_bio() is not supported with shared tio->len_ptr */
+ if (len)
+ setup_split_accounting(ci, *len);
+
+ /*
+ * Using alloc_multiple_bios(), even if num_bios is 1, to consistently
+ * support allocating using GFP_NOWAIT with GFP_NOIO fallback.
+ */
+ alloc_multiple_bios(&blist, ci, ti, num_bios, len, gfp_flag);
+ while ((clone = bio_list_pop(&blist))) {
+ if (num_bios > 1)
dm_tio_set_flag(clone_to_tio(clone), DM_TIO_IS_DUPLICATE_BIO);
- __map_bio(clone);
- ret += 1;
- }
- break;
+ __map_bio(clone);
+ ret += 1;
}
return ret;
unsigned int bios;
struct dm_target *ti = dm_table_get_target(t, i);
+ if (unlikely(ti->num_flush_bios == 0))
+ continue;
+
atomic_add(ti->num_flush_bios, &ci->io->io_count);
- bios = __send_duplicate_bios(ci, ti, ti->num_flush_bios, NULL);
+ bios = __send_duplicate_bios(ci, ti, ti->num_flush_bios,
+ NULL, GFP_NOWAIT);
atomic_sub(ti->num_flush_bios - bios, &ci->io->io_count);
}
bio_uninit(ci->bio);
}
- static void __send_changing_extent_only(struct clone_info *ci, struct dm_target *ti,
- unsigned int num_bios,
- unsigned int max_granularity,
- unsigned int max_sectors)
+ static void __send_abnormal_io(struct clone_info *ci, struct dm_target *ti,
+ unsigned int num_bios, unsigned int max_granularity,
+ unsigned int max_sectors)
{
unsigned int len, bios;
__max_io_len(ti, ci->sector, max_granularity, max_sectors));
atomic_add(num_bios, &ci->io->io_count);
- bios = __send_duplicate_bios(ci, ti, num_bios, &len);
+ bios = __send_duplicate_bios(ci, ti, num_bios, &len, GFP_NOIO);
/*
* alloc_io() takes one extra reference for submission, so the
* reference won't reach 0 without the following (+1) subtraction
if (unlikely(!num_bios))
return BLK_STS_NOTSUPP;
- __send_changing_extent_only(ci, ti, num_bios,
- max_granularity, max_sectors);
+ __send_abnormal_io(ci, ti, num_bios, max_granularity, max_sectors);
+
return BLK_STS_OK;
}
if (unlikely(!ti))
return BLK_STS_IOERR;
- if (unlikely((ci->bio->bi_opf & REQ_NOWAIT) != 0) &&
- unlikely(!dm_target_supports_nowait(ti->type)))
- return BLK_STS_NOTSUPP;
-
if (unlikely(ci->is_abnormal_io))
return __process_abnormal_io(ci, ti);
len = min_t(sector_t, max_io_len(ti, ci->sector), ci->sector_count);
setup_split_accounting(ci, len);
- clone = alloc_tio(ci, ti, 0, &len, GFP_NOIO);
+
+ if (unlikely(ci->bio->bi_opf & REQ_NOWAIT)) {
+ if (unlikely(!dm_target_supports_nowait(ti->type)))
+ return BLK_STS_NOTSUPP;
+
+ clone = alloc_tio(ci, ti, 0, &len, GFP_NOWAIT);
+ if (unlikely(!clone))
+ return BLK_STS_AGAIN;
+ } else {
+ clone = alloc_tio(ci, ti, 0, &len, GFP_NOIO);
+ }
__map_bio(clone);
ci->sector += len;
return BLK_STS_OK;
}
- static void init_clone_info(struct clone_info *ci, struct mapped_device *md,
+ static void init_clone_info(struct clone_info *ci, struct dm_io *io,
struct dm_table *map, struct bio *bio, bool is_abnormal)
{
ci->map = map;
- ci->io = alloc_io(md, bio);
+ ci->io = io;
ci->bio = bio;
ci->is_abnormal_io = is_abnormal;
ci->submit_as_polled = false;
return;
}
- init_clone_info(&ci, md, map, bio, is_abnormal);
- io = ci.io;
+ /* Only support nowait for normal IO */
+ if (unlikely(bio->bi_opf & REQ_NOWAIT) && !is_abnormal) {
+ io = alloc_io(md, bio, GFP_NOWAIT);
+ if (unlikely(!io)) {
+ /* Unable to do anything without dm_io. */
+ bio_wouldblock_error(bio);
+ return;
+ }
+ } else {
+ io = alloc_io(md, bio, GFP_NOIO);
+ }
+ init_clone_info(&ci, io, map, bio, is_abnormal);
if (bio->bi_opf & REQ_PREFLUSH) {
__send_empty_flush(&ci);
projects / linux.git / commitdiff