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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2009-03-18 13:27:34 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2009-03-18 13:28:12 +0100 |
| commit | cf087343805ebfea2b1234b06fd5f12273e865b1 (patch) | |
| tree | ef8638ea143240ca45df1af83a05c4b98c9ab509 /arch/s390 | |
| parent | [S390] topology: define SD_MC_INIT to fix performance regression (diff) | |
| download | linux-cf087343805ebfea2b1234b06fd5f12273e865b1.tar.xz linux-cf087343805ebfea2b1234b06fd5f12273e865b1.zip | |
[S390] ftrace/mcount: fix kernel stack backchain
With packed stack the backchain is at a different location.
Just use __SF_BACKCHAIN as an offset to store the backchain.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/kernel/mcount.S | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/s390/kernel/mcount.S b/arch/s390/kernel/mcount.S index 397d131a345f..80641224a095 100644 --- a/arch/s390/kernel/mcount.S +++ b/arch/s390/kernel/mcount.S @@ -5,6 +5,8 @@ * */ +#include <asm/asm-offsets.h> + #ifndef CONFIG_64BIT .globl _mcount _mcount: @@ -14,7 +16,7 @@ _mcount: ahi %r15,-96 l %r3,100(%r15) la %r2,0(%r14) - st %r1,0(%r15) + st %r1,__SF_BACKCHAIN(%r15) la %r3,0(%r3) bras %r14,0f .long ftrace_trace_function @@ -38,7 +40,7 @@ _mcount: stg %r14,112(%r15) lgr %r1,%r15 aghi %r15,-160 - stg %r1,0(%r15) + stg %r1,__SF_BACKCHAIN(%r15) lgr %r2,%r14 lg %r3,168(%r15) larl %r14,ftrace_trace_function |