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| author |   James Morris <james.l.morris@oracle.com> | 2014-04-14 11:23:14 +1000 |
|---|---|---|
| committer | James Morris <james.l.morris@oracle.com> | 2014-04-14 11:23:14 +1000 |
| commit | ecd740c6f2f092b90b95fa35f757973589eaaca2 (patch) | |
| tree | ce02b1e18c4fc5729699251460cd8be7604d8401 /include/linux/bitops.h | |
| parent | selinux: correctly label /proc inodes in use before the policy is loaded (diff) | |
| parent | Linux 3.14 (diff) | |
| download | linux-dev-ecd740c6f2f092b90b95fa35f757973589eaaca2.tar.xz linux-dev-ecd740c6f2f092b90b95fa35f757973589eaaca2.zip | |
Merge commit 'v3.14' into next
Diffstat (limited to 'include/linux/bitops.h')
| -rw-r--r-- | include/linux/bitops.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/include/linux/bitops.h b/include/linux/bitops.h index abc9ca778456..be5fd38bd5a0 100644 --- a/include/linux/bitops.h +++ b/include/linux/bitops.h @@ -196,6 +196,21 @@ static inline unsigned long __ffs64(u64 word) #ifdef __KERNEL__ +#ifndef set_mask_bits +#define set_mask_bits(ptr, _mask, _bits) \ +({ \ + const typeof(*ptr) mask = (_mask), bits = (_bits); \ + typeof(*ptr) old, new; \ + \ + do { \ + old = ACCESS_ONCE(*ptr); \ + new = (old & ~mask) | bits; \ + } while (cmpxchg(ptr, old, new) != old); \ + \ + new; \ +}) +#endif + #ifndef find_last_bit /** * find_last_bit - find the last set bit in a memory region |