[PATCH] i386: clean up vDSO alignment padding

This makes the vDSO use nops for all its padding around instructions,
rather than sometimes zeros, and nop-pads the end of the area containing
instructions to a 32-byte cache line, to keep text and data in separate
lines.

Signed-off-by: Roland McGrath <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

diff --git a/arch/i386/kernel/vsyscall-sigreturn.S b/arch/i386/kernel/vsyscall-sigreturn.S
index c8fcf75b9be33fbf35f6b36311fae25d47d8be1d..68afa50dd7cf79bf0d5eb021115c59e03fee692f 100644 (file)
--- a/arch/i386/kernel/vsyscall-sigreturn.S
+++ b/arch/i386/kernel/vsyscall-sigreturn.S
@@ -15,7 +15,7 @@
 */
 
        .text
-       .org    __kernel_vsyscall+32
+       .org __kernel_vsyscall+32,0x90
        .globl __kernel_sigreturn
        .type __kernel_sigreturn,@function
 __kernel_sigreturn:
@@ -35,6 +35,7 @@ __kernel_rt_sigreturn:
        int $0x80
 .LEND_rt_sigreturn:
        .size __kernel_rt_sigreturn,.-.LSTART_rt_sigreturn
+       .balign 32
        .previous
 
        .section .eh_frame,"a",@progbits