61e02392d3
A test_and_{}_bit() operation fails if the value of the bit is such that
the modification does not take place. For example, if test_and_set_bit()
returns 1. In these cases, follow the behaviour of cmpxchg and allow the
operation to be unordered. This also applies to test_and_set_bit_lock()
if the lock is found to be be taken already.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1518528619-20049-1-git-send-email-will.deacon@arm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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| .. | ||
| __ffs.h | ||
| __fls.h | ||
| arch_hweight.h | ||
| atomic.h | ||
| builtin-__ffs.h | ||
| builtin-__fls.h | ||
| builtin-ffs.h | ||
| builtin-fls.h | ||
| const_hweight.h | ||
| ext2-atomic-setbit.h | ||
| ext2-atomic.h | ||
| ffs.h | ||
| ffz.h | ||
| find.h | ||
| fls.h | ||
| fls64.h | ||
| hweight.h | ||
| le.h | ||
| lock.h | ||
| non-atomic.h | ||
| sched.h | ||