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| author |   Frederic Weisbecker <fweisbec@gmail.com> | 2011-06-08 01:13:27 +0200 |
|---|---|---|
| committer | Frederic Weisbecker <fweisbec@gmail.com> | 2011-06-10 15:15:40 +0200 |
| commit | bdd4e85dc36cdbcfc1608a5b2a17c80a9db8986a (patch) | |
| tree | 9cee98e78a5aa6a00f3b7ce805b1e39a0137b4a4 /include/linux/bit_spinlock.h | |
| parent | sched: Remove pointless in_atomic() definition check (diff) | |
| download | linux-dev-bdd4e85dc36cdbcfc1608a5b2a17c80a9db8986a.tar.xz linux-dev-bdd4e85dc36cdbcfc1608a5b2a17c80a9db8986a.zip | |
sched: Isolate preempt counting in its own config option
Create a new CONFIG_PREEMPT_COUNT that handles the inc/dec
of preempt count offset independently. So that the offset
can be updated by preempt_disable() and preempt_enable()
even without the need for CONFIG_PREEMPT beeing set.
This prepares to make CONFIG_DEBUG_SPINLOCK_SLEEP working
with !CONFIG_PREEMPT where it currently doesn't detect
code that sleeps inside explicit preemption disabled
sections.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Diffstat (limited to 'include/linux/bit_spinlock.h')
| -rw-r--r-- | include/linux/bit_spinlock.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/bit_spinlock.h b/include/linux/bit_spinlock.h index b4326bfa684f..564d997e2168 100644 --- a/include/linux/bit_spinlock.h +++ b/include/linux/bit_spinlock.h @@ -88,7 +88,7 @@ static inline int bit_spin_is_locked(int bitnum, unsigned long *addr) { #if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK) return test_bit(bitnum, addr); -#elif defined CONFIG_PREEMPT +#elif defined CONFIG_PREEMPT_COUNT return preempt_count(); #else return 1; |