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| author | Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de> | 2009-02-27 23:30:03 +0300 |
|---|---|---|
| committer | Steven Rostedt <srostedt@redhat.com> | 2009-03-03 00:49:37 +0300 |
| commit | c79a61f55773d2519fd0525bf58385f7d20752d3 (patch) | |
| tree | 7f2d2eca7e6e7fbe9804800f03ae4c7d52d775b7 /arch/xtensa | |
| parent | 96ccd21cd13140221bda74a4fc4e53ffeba7c7d4 (diff) | |
| download | linux-c79a61f55773d2519fd0525bf58385f7d20752d3.tar.xz | |
tracing: make CALLER_ADDRx overwriteable
The current definition of CALLER_ADDRx isn't suitable for all platforms.
E.g. for ARM __builtin_return_address(N) doesn't work for N > 0 and
AFAIK for powerpc there are no frame pointers needed to have a working
__builtin_return_address. This patch allows defining the CALLER_ADDRx
macros in <asm/ftrace.h> and let these take precedence.
Because now <asm/ftrace.h> is included unconditionally in
<linux/ftrace.h> all archs that don't already had this include get an
empty one for free.
Signed-off-by: Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@elte.hu>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Diffstat (limited to 'arch/xtensa')
| -rw-r--r-- | arch/xtensa/include/asm/ftrace.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/xtensa/include/asm/ftrace.h b/arch/xtensa/include/asm/ftrace.h new file mode 100644 index 000000000000..40a8c178f10d --- /dev/null +++ b/arch/xtensa/include/asm/ftrace.h @@ -0,0 +1 @@ +/* empty */ |