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authorWaiman Long <longman@redhat.com>2018-03-31 00:27:58 +0300
committerIngo Molnar <mingo@kernel.org>2018-03-31 08:30:50 +0300
commit5149cbac4235e12a34cf089592a8bd1c9fcfa467 (patch)
treedc8965899aaab98faf1c1f0b7319fd1af2dde616 /lib/notifier-error-inject.h
parent169310f71fc820fe153ec04c6a111e444a68d6d5 (diff)
downloadlinux-5149cbac4235e12a34cf089592a8bd1c9fcfa467.tar.xz
locking/rwsem: Add DEBUG_RWSEMS to look for lock/unlock mismatches
For a rwsem, locking can either be exclusive or shared. The corresponding exclusive or shared unlock must be used. Otherwise, the protected data structures may get corrupted or the lock may be in an inconsistent state. In order to detect such anomaly, a new configuration option DEBUG_RWSEMS is added which can be enabled to look for such mismatches and print warnings that that happens. Signed-off-by: Waiman Long <longman@redhat.com> Acked-by: Davidlohr Bueso <dave@stgolabs.net> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1522445280-7767-2-git-send-email-longman@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
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