kernel.git/arch/sparc/lib/atomic32.c, branch linux-4.8.y

locking/atomic, arch/sparc: Implement atomic{,64}_fetch_{add,sub,and,or,xor}()

2016-06-16T08:48:30Z

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) Acked-by: David S. Miller Cc: Andrew Morton Cc: James Y Knight Cc: Linus Torvalds Cc: Paul E. McKenney Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: linux-arch@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: sparclinux@vger.kernel.org Signed-off-by: Ingo Molnar

sparc: Provide atomic_{or,xor,and}

2015-07-27T12:06:23Z

Implement atomic logic ops -- atomic_{or,xor,and}. These will replace the atomic_{set,clear}_mask functions that are available on some archs. Acked-by: David S. Miller Signed-off-by: Peter Zijlstra (Intel) Signed-off-by: Thomas Gleixner

sparc32: Implement xchg and atomic_xchg using ATOMIC_HASH locks

2014-11-07T20:51:44Z

Atomicity between xchg and cmpxchg cannot be guaranteed when xchg is implemented with a swap and cmpxchg is implemented with locks. Without this, e.g. mcs_spin_lock and mcs_spin_unlock are broken. Signed-off-by: Andreas Larsson Signed-off-by: David S. Miller

locking,arch,sparc: Fold atomic_ops

2014-08-14T10:48:13Z

Many of the atomic op implementations are the same except for one instruction; fold the lot into a few CPP macros and reduce LoC. This also prepares for easy addition of new ops. Signed-off-by: Peter Zijlstra Acked-by: David S. Miller Cc: Bjorn Helgaas Cc: Kirill Tkhai Cc: Linus Torvalds Cc: Paul E. McKenney Cc: Sam Ravnborg Cc: sparclinux@vger.kernel.org Link: http://lkml.kernel.org/r/20140508135852.825281379@infradead.org Signed-off-by: Ingo Molnar

sparc: Fix __atomic_add_unless() return value.

2011-08-04T09:47:40Z

Signed-off-by: David S. Miller

sparc: rename atomic_add_unless

2011-07-27T19:53:36Z

Should have been done in commit 1af08a1407f4 ("This is in preparation for more generic atomic"). Signed-off-by: Stephen Rothwell Cc: Arun Sharma Cc: David Miller Cc: "Hans-Christian Egtvedt" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

atomic: use

2011-07-26T23:49:47Z

This allows us to move duplicated code in (atomic_inc_not_zero() for now) to Signed-off-by: Arun Sharma Reviewed-by: Eric Dumazet Cc: Ingo Molnar Cc: David Miller Cc: Eric Dumazet Acked-by: Mike Frysinger Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

sparc: Replace deprecated spinlock initialization

2011-01-27T11:30:37Z

SPIN_LOCK_UNLOCK is deprecated. Use the lockdep capable variant instead. Signed-off-by: Thomas Gleixner Acked-by: David S. Miller

[SPARC32]: Build fix.

2007-05-31T08:52:51Z

Fix 6197fe4d720ea3e2ee94cdc7ef32d6c0151199de arch/sparc/lib/atomic32.c: In function '__cmpxchg_u32': arch/sparc/lib/atomic32.c:127: error: 'addr' undeclared (first use in this function) arch/sparc/lib/atomic32.c:127: error: (Each undeclared identifier is reported only once arch/sparc/lib/atomic32.c:127: error: for each function it appears in.) I assume this is what was intended.. Signed-off-by: Andrew Morton Acked-by: William Irwin Signed-off-by: David S. Miller

[SPARC]: Emulate cmpxchg like parisc

2007-05-29T09:51:13Z

Signed-off-by: Kyle McMartin Signed-off-by: David S. Miller