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authorPeter Zijlstra <peterz@infradead.org>2016-04-18 01:16:07 +0200
committerIngo Molnar <mingo@kernel.org>2016-06-16 10:48:25 +0200
commit4be7dd393515615430a4d07ca1ffceaf2a331620 (patch)
treea69d51f7059eae1a168f58aca3f853ddbf755c54 /arch/sh/Kconfig
parent0c074cbc33091dd69fe70ec27474d228c3184860 (diff)
locking/atomic, arch/hexagon: Implement atomic_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: Richard Kuo <rkuo@codeaurora.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-arch@vger.kernel.org Cc: linux-hexagon@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/sh/Kconfig')
0 files changed, 0 insertions, 0 deletions