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authorIngo Molnar <mingo@elte.hu>2009-03-05 05:45:22 -0500
committerIngo Molnar <mingo@elte.hu>2009-03-05 05:45:22 -0500
commita140feab42d1cfd811930ab76104559c19dfc4b0 (patch)
tree41fd871990e888dd5616a6bf1891a1ff307221df /arch/x86/kernel/ftrace.c
parent1075414b06109a99b0e87601e84c74a95bd45681 (diff)
parentfec6c6fec3e20637bee5d276fb61dd8b49a3f9cc (diff)
Merge commit 'v2.6.29-rc7' into core/locking
Diffstat (limited to 'arch/x86/kernel/ftrace.c')
-rw-r--r--arch/x86/kernel/ftrace.c17
1 files changed, 9 insertions, 8 deletions
diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c
index 1b43086b097a..231bdd3c5b1c 100644
--- a/arch/x86/kernel/ftrace.c
+++ b/arch/x86/kernel/ftrace.c
@@ -488,20 +488,21 @@ void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr)
488 * ignore such a protection. 488 * ignore such a protection.
489 */ 489 */
490 asm volatile( 490 asm volatile(
491 "1: " _ASM_MOV " (%[parent_old]), %[old]\n" 491 "1: " _ASM_MOV " (%[parent]), %[old]\n"
492 "2: " _ASM_MOV " %[return_hooker], (%[parent_replaced])\n" 492 "2: " _ASM_MOV " %[return_hooker], (%[parent])\n"
493 " movl $0, %[faulted]\n" 493 " movl $0, %[faulted]\n"
494 "3:\n"
494 495
495 ".section .fixup, \"ax\"\n" 496 ".section .fixup, \"ax\"\n"
496 "3: movl $1, %[faulted]\n" 497 "4: movl $1, %[faulted]\n"
498 " jmp 3b\n"
497 ".previous\n" 499 ".previous\n"
498 500
499 _ASM_EXTABLE(1b, 3b) 501 _ASM_EXTABLE(1b, 4b)
500 _ASM_EXTABLE(2b, 3b) 502 _ASM_EXTABLE(2b, 4b)
501 503
502 : [parent_replaced] "=r" (parent), [old] "=r" (old), 504 : [old] "=r" (old), [faulted] "=r" (faulted)
503 [faulted] "=r" (faulted) 505 : [parent] "r" (parent), [return_hooker] "r" (return_hooker)
504 : [parent_old] "0" (parent), [return_hooker] "r" (return_hooker)
505 : "memory" 506 : "memory"
506 ); 507 );
507 508