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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2014-08-15 12:33:46 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2014-09-09 08:53:28 +0200 |
| commit | 2481a87b0250bbf429fc8cdc78331efbc44a0221 (patch) | |
| tree | 0bf818ad656c2c12bbe4bc5b7882c99826439b93 /arch/s390/include/asm/ftrace.h | |
| parent | 0f1b1ff54b386926ef1a524e60ef89ae7738bbd5 (diff) | |
| download | op-kernel-dev-2481a87b0250bbf429fc8cdc78331efbc44a0221.zip op-kernel-dev-2481a87b0250bbf429fc8cdc78331efbc44a0221.tar.gz | |
s390/ftrace: optimize function graph caller code
When the function graph tracer is disabled we can skip three additional
instructions. So let's just do this.
So if function tracing is enabled but function graph tracing is
runtime disabled, we get away with a single unconditional branch.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/ftrace.h')
| -rw-r--r-- | arch/s390/include/asm/ftrace.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/s390/include/asm/ftrace.h b/arch/s390/include/asm/ftrace.h index bf246da..7b8e456 100644 --- a/arch/s390/include/asm/ftrace.h +++ b/arch/s390/include/asm/ftrace.h @@ -4,6 +4,7 @@ #ifndef __ASSEMBLY__ extern void _mcount(void); +extern char ftrace_graph_caller_end; struct dyn_arch_ftrace { }; |
