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author | Peter Zijlstra <peterz@infradead.org> | 2016-04-17 23:10:52 (GMT) |
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committer | Ingo Molnar <mingo@kernel.org> | 2016-06-16 08:48:20 (GMT) |
commit | 6da068c1beba684b2a0dbf43a07b0529edd9e959 (patch) | |
tree | dcc2b7f55837ea2981ba460f3cc7de2f5ec379eb /scripts | |
parent | fbffe892e5253dd02c016c59a9d792eafe9d53e1 (diff) | |
download | linux-6da068c1beba684b2a0dbf43a07b0529edd9e959.tar.xz |
locking/atomic, arch/arm: Implement atomic{,64}_fetch_{add,sub,and,andnot,or,xor}{,_relaxed,_acquire,_release}()
Implement FETCH-OP atomic primitives, these are very similar to the
existing OP-RETURN primitives we already have, except they return the
value of the atomic variable _before_ modification.
This is especially useful for irreversible operations -- such as
bitops (because it becomes impossible to reconstruct the state prior
to modification).
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Will Deacon <will.deacon@arm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Davidlohr Bueso <dbueso@suse.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-arch@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'scripts')
0 files changed, 0 insertions, 0 deletions