Commit-ID: e8f7c70f44f75c827c04239b0ae5f0068b65b76e Gitweb: http://git.kernel.org/tip/e8f7c70f44f75c827c04239b0ae5f0068b65b76e Author: Frederic Weisbecker <fweisbec@xxxxxxxxx> AuthorDate: Wed, 8 Jun 2011 01:51:02 +0200 Committer: Frederic Weisbecker <fweisbec@xxxxxxxxx> CommitDate: Fri, 10 Jun 2011 15:16:06 +0200 sched: Make sleeping inside spinlock detection working in !CONFIG_PREEMPT Select CONFIG_PREEMPT_COUNT when we enable the sleeping inside spinlock detection, so that the preempt offset gets correctly incremented/decremented from preempt_disable()/preempt_enable(). This makes the preempt count eventually working in !CONFIG_PREEMPT when that debug option is set and thus fixes the detection of explicit preemption disabled sections under such config. Code that sleeps in explicitly preempt disabled section can be finally spotted in non-preemptible kernels. Signed-off-by: Frederic Weisbecker <fweisbec@xxxxxxxxx> Acked-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx> Cc: Ingo Molnar <mingo@xxxxxxx> Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> --- lib/Kconfig.debug | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 28afa4c..a7dd7b5 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -650,6 +650,7 @@ config TRACE_IRQFLAGS config DEBUG_SPINLOCK_SLEEP bool "Spinlock debugging: sleep-inside-spinlock checking" + select PREEMPT_COUNT depends on DEBUG_KERNEL help If you say Y here, various routines which may sleep will become very -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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