diff options
author | Peter Zijlstra <peterz@infradead.org> | 2016-04-18 01:16:06 +0200 |
---|---|---|
committer | Ingo Molnar <mingo@kernel.org> | 2016-06-16 10:48:27 +0200 |
commit | 4edac529eb629ccd598e2236c61762537f16e883 (patch) | |
tree | 51404e266d10636af9d919a7110126ed97afbfd8 /arch/mn10300 | |
parent | e898eb27ffd8b0ad6f4fd0b631559bc877c85444 (diff) | |
download | linux-stable-4edac529eb629ccd598e2236c61762537f16e883.tar.gz linux-stable-4edac529eb629ccd598e2236c61762537f16e883.tar.bz2 linux-stable-4edac529eb629ccd598e2236c61762537f16e883.zip |
locking/atomic, arch/mips: Implement atomic{,64}_fetch_{add,sub,and,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: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-arch@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/mn10300')
0 files changed, 0 insertions, 0 deletions