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| author | Andi Kleen <ak@suse.de> | 2006-09-26 10:52:28 +0200 |
|---|---|---|
| committer | Andi Kleen <andi@basil.nowhere.org> | 2006-09-26 10:52:28 +0200 |
| commit | 0cb91a2293648507886563ccb91979cfc94d6a4b (patch) | |
| tree | f2a994f8b874e3c81c5519d445a0c5fa5522e4b5 /kernel/spinlock.c | |
| parent | c16b63e09d9d03158e0a92e961234e94c4862620 (diff) | |
| download | lwn-0cb91a2293648507886563ccb91979cfc94d6a4b.tar.gz lwn-0cb91a2293648507886563ccb91979cfc94d6a4b.zip | |
[PATCH] i386: Account spinlocks to the caller during profiling for !FP kernels
This ports the algorithm from x86-64 (with improvements) to i386.
Previously this only worked for frame pointer enabled kernels.
But spinlocks have a very simple stack frame that can be manually
analyzed. Do this.
Signed-off-by: Andi Kleen <ak@suse.de>
Diffstat (limited to 'kernel/spinlock.c')
| -rw-r--r-- | kernel/spinlock.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/kernel/spinlock.c b/kernel/spinlock.c index fb524b009eef..9644a41e0bef 100644 --- a/kernel/spinlock.c +++ b/kernel/spinlock.c @@ -7,6 +7,11 @@ * * This file contains the spinlock/rwlock implementations for the * SMP and the DEBUG_SPINLOCK cases. (UP-nondebug inlines them) + * + * Note that some architectures have special knowledge about the + * stack frames of these functions in their profile_pc. If you + * change anything significant here that could change the stack + * frame contact the architecture maintainers. */ #include <linux/linkage.h> |