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| author | Thomas Gleixner <tglx@linutronix.de> | 2016-06-03 15:05:51 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2016-06-03 15:05:51 +0200 |
| commit | 2eec3707a33fbf1c2e0a88ffc9fc0e465c2a59fd (patch) | |
| tree | 9e47763ecd38f0ddd29f07e1ce199680304449fa /include/linux/bitops.h | |
| parent | 59fa5860204ffc95128d60cba9f54f9740a42c7d (diff) | |
| parent | 0de6b9979e2e10c79e5702d2d902cd7284d17689 (diff) | |
| download | lwn-2eec3707a33fbf1c2e0a88ffc9fc0e465c2a59fd.tar.gz lwn-2eec3707a33fbf1c2e0a88ffc9fc0e465c2a59fd.zip | |
Merge tag 'irqchip-4.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms into irq/urgent
Merge irqchip updates from Marc Zyngier:
- A number of embarassing buglets (GICv3, PIC32)
- A more substential errata workaround for Cavium's GICv3 ITS
(kept for post-rc1 due to its dependency on NUMA)
Diffstat (limited to 'include/linux/bitops.h')
| -rw-r--r-- | include/linux/bitops.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/include/linux/bitops.h b/include/linux/bitops.h index defeaac0745f..299e76b59fe9 100644 --- a/include/linux/bitops.h +++ b/include/linux/bitops.h @@ -227,6 +227,22 @@ static inline unsigned long __ffs64(u64 word) }) #endif +#ifndef bit_clear_unless +#define bit_clear_unless(ptr, _clear, _test) \ +({ \ + const typeof(*ptr) clear = (_clear), test = (_test); \ + typeof(*ptr) old, new; \ + \ + do { \ + old = ACCESS_ONCE(*ptr); \ + new = old & ~clear; \ + } while (!(old & test) && \ + cmpxchg(ptr, old, new) != old); \ + \ + !(old & test); \ +}) +#endif + #ifndef find_last_bit /** * find_last_bit - find the last set bit in a memory region |