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author | Peter Zijlstra <peterz@infradead.org> | 2016-04-18 01:16:09 +0200 |
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committer | Ingo Molnar <mingo@kernel.org> | 2016-06-16 10:48:20 +0200 |
commit | fbffe892e5253dd02c016c59a9d792eafe9d53e1 (patch) | |
tree | 668ef1af920c73d04fac72baf07a817d65d14a5a /security/device_cgroup.c | |
parent | locking/atomic, arch/alpha: Implement atomic{,64}_fetch_{add,sub,and,andnot,o... (diff) | |
download | linux-fbffe892e5253dd02c016c59a9d792eafe9d53e1.tar.xz linux-fbffe892e5253dd02c016c59a9d792eafe9d53e1.zip |
locking/atomic, arch/arc: Implement atomic_fetch_{add,sub,and,andnot,or,xor}()
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: Vineet Gupta <vgupta@synopsys.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Noam Camus <noamc@ezchip.com>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-arch@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-snps-arc@lists.infradead.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'security/device_cgroup.c')
0 files changed, 0 insertions, 0 deletions