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author | Peter Zijlstra <peterz@infradead.org> | 2016-04-18 01:16:08 +0200 |
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committer | Ingo Molnar <mingo@kernel.org> | 2016-06-16 10:48:23 +0200 |
commit | e87fc0ec070554e34812be68267a9450271868d6 (patch) | |
tree | d99ccf1052722bd4e699414851673768f4004e8f /arch/arm/mach-ixp4xx/dsmg600-setup.c | |
parent | 1a6eafacd4811cdc1b138faee858527658eee4e1 (diff) | |
download | op-kernel-dev-e87fc0ec070554e34812be68267a9450271868d6.zip op-kernel-dev-e87fc0ec070554e34812be68267a9450271868d6.tar.gz |
locking/atomic, arch/blackfin: 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: Steven Miao <realmz6@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: adi-buildroot-devel@lists.sourceforge.net
Cc: linux-arch@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/arm/mach-ixp4xx/dsmg600-setup.c')
0 files changed, 0 insertions, 0 deletions