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authorPeter Zijlstra <peterz@infradead.org>2016-04-18 01:16:06 +0200
committerIngo Molnar <mingo@kernel.org>2016-06-16 10:48:27 +0200
commit4edac529eb629ccd598e2236c61762537f16e883 (patch)
tree51404e266d10636af9d919a7110126ed97afbfd8 /arch/mn10300/include
parente898eb27ffd8b0ad6f4fd0b631559bc877c85444 (diff)
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/include')
0 files changed, 0 insertions, 0 deletions