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| author | K.Prasad <prasad@linux.vnet.ibm.com> | 2010-06-15 11:34:34 +0530 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2010-06-22 19:40:50 +1000 |
| commit | f7136c5150c29846d7a1d09109449d96b2f63445 (patch) | |
| tree | 7e961ac7d78ee8322d136f7a6d4da03a6ad2cda7 /kernel/hw_breakpoint.c | |
| parent | 0016a4cf5582415849fafbf9f019dd9530824789 (diff) | |
| download | lwn-f7136c5150c29846d7a1d09109449d96b2f63445.tar.gz lwn-f7136c5150c29846d7a1d09109449d96b2f63445.zip | |
hw_breakpoints: Allow arch-specific cleanup before breakpoint unregistration
Certain architectures (such as PowerPC) have a need to clean up data
structures before a breakpoint is unregistered. This introduces an
arch-specific hook in release_bp_slot() along with a weak definition
in the form of a stub function.
Signed-off-by: K.Prasad <prasad@linux.vnet.ibm.com>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'kernel/hw_breakpoint.c')
| -rw-r--r-- | kernel/hw_breakpoint.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/kernel/hw_breakpoint.c b/kernel/hw_breakpoint.c index 7a56b22e0602..71ed3ce29e12 100644 --- a/kernel/hw_breakpoint.c +++ b/kernel/hw_breakpoint.c @@ -242,6 +242,17 @@ toggle_bp_slot(struct perf_event *bp, bool enable, enum bp_type_idx type, } /* + * Function to perform processor-specific cleanup during unregistration + */ +__weak void arch_unregister_hw_breakpoint(struct perf_event *bp) +{ + /* + * A weak stub function here for those archs that don't define + * it inside arch/.../kernel/hw_breakpoint.c + */ +} + +/* * Contraints to check before allowing this new breakpoint counter: * * == Non-pinned counter == (Considered as pinned for now) @@ -339,6 +350,7 @@ void release_bp_slot(struct perf_event *bp) { mutex_lock(&nr_bp_mutex); + arch_unregister_hw_breakpoint(bp); __release_bp_slot(bp); mutex_unlock(&nr_bp_mutex); |