diff options
author | Peter Zijlstra <peterz@infradead.org> | 2016-04-18 01:16:10 +0200 |
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committer | Ingo Molnar <mingo@kernel.org> | 2016-06-16 10:48:19 +0200 |
commit | 1f51dee7ca7424be6f84067395166f878dbdd8be (patch) | |
tree | 00ee8bbb41a295b4e8299bb51d0e5dcf0229d8b3 /arch/arc | |
parent | b316ff783d17bd6217804e2e4385ce9347d7dad9 (diff) |
locking/atomic, arch/alpha: Implement atomic{,64}_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>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-alpha@vger.kernel.org
Cc: linux-arch@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/arc')
0 files changed, 0 insertions, 0 deletions