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author | Peter Zijlstra <peterz@infradead.org> | 2016-04-18 01:16:04 +0200 |
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committer | Ingo Molnar <mingo@kernel.org> | 2016-06-16 10:48:30 +0200 |
commit | 3a1adb23a52c920304239efff377d3bc967febc2 (patch) | |
tree | 63383d193b7a7adaec40939daac2cdd22326108a /arch/tile/include | |
parent | 7d9794e7523798e1b9422ad9f4e4d808ae5d5932 (diff) | |
download | linux-stable-3a1adb23a52c920304239efff377d3bc967febc2.tar.gz linux-stable-3a1adb23a52c920304239efff377d3bc967febc2.tar.bz2 linux-stable-3a1adb23a52c920304239efff377d3bc967febc2.zip |
locking/atomic, arch/sparc: 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>
Acked-by: David S. Miller <davem@davemloft.net>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: James Y Knight <jyknight@google.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
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: sparclinux@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/tile/include')
0 files changed, 0 insertions, 0 deletions