Revision 16ec54ad1502a095a35b4ae3bf6ec129111a44c5 authored by Linus Torvalds on 19 January 2014, 21:06:51 UTC, committed by Linus Torvalds on 19 January 2014, 21:06:51 UTC
Pull perf fixes from Ingo Molnar:
- an s2ram related fix on AMD systems
- a perf fault handling bug that is relatively old but which has become
much easier to trigger in v3.13 after commit e00b12e64be9 ("perf/x86:
Further optimize copy_from_user_nmi()")
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf/x86/amd/ibs: Fix waking up from S3 for AMD family 10h
x86, mm, perf: Allow recursive faults from interrupts
dbg_stackkill.S
/*
* arch/alpha/lib/dbg_stackkill.S
* Contributed by Richard Henderson (rth@cygnus.com)
*
* Clobber the balance of the kernel stack, hoping to catch
* uninitialized local variables in the act.
*/
#include <asm/asm-offsets.h>
.text
.set noat
.align 5
.globl _mcount
.ent _mcount
_mcount:
.frame $30, 0, $28, 0
.prologue 0
ldi $0, 0xdeadbeef
lda $2, -STACK_SIZE
sll $0, 32, $1
and $30, $2, $2
or $0, $1, $0
lda $2, TASK_SIZE($2)
cmpult $2, $30, $1
beq $1, 2f
1: stq $0, 0($2)
addq $2, 8, $2
cmpult $2, $30, $1
bne $1, 1b
2: ret ($28)
.end _mcount
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