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Subject[PATCH 2/2] lockdep: Simplify debug atomic ops
Date
Simplify debug_atomic_inc/dec by using this_cpu_inc/dec() instead
of doing it through an indirect get_cpu_var() and a manual
incrementation.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
---
kernel/lockdep_internals.h | 10 ++--------
1 files changed, 2 insertions(+), 8 deletions(-)

diff --git a/kernel/lockdep_internals.h b/kernel/lockdep_internals.h
index 8d7d4b6..2b17476 100644
--- a/kernel/lockdep_internals.h
+++ b/kernel/lockdep_internals.h
@@ -140,19 +140,13 @@ struct lockdep_stats {
DECLARE_PER_CPU(struct lockdep_stats, lockdep_stats);

#define debug_atomic_inc(ptr) { \
- struct lockdep_stats *__cpu_lockdep_stats; \
- \
WARN_ON_ONCE(!irqs_disabled()); \
- __cpu_lockdep_stats = &__get_cpu_var(lockdep_stats); \
- __cpu_lockdep_stats->ptr++; \
+ this_cpu_inc(lockdep_stats.ptr); \
}

#define debug_atomic_dec(ptr) { \
- struct lockdep_stats *__cpu_lockdep_stats; \
- \
WARN_ON_ONCE(!irqs_disabled()); \
- __cpu_lockdep_stats = &__get_cpu_var(lockdep_stats); \
- __cpu_lockdep_stats->ptr--; \
+ this_cpu_inc(lockdep_stats.ptr); \
}

#define debug_atomic_read(ptr) ({ \
--
1.6.2.3


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