linux.git/arch/sh/include/asm/atomic.h, branch v3.0

atomic_t: Cast to volatile when accessing atomic variables

2010-05-17T14:57:27+00:00

In preparation for removing volatile from the atomic_t definition, this
patch adds a volatile cast to all the atomic read functions.

Signed-off-by: Anton Blanchard 
Signed-off-by: Linus Torvalds

sh: consolidate atomic_cmpxchg()/atomic_add_unless() definitions.

2010-01-08T08:02:17+00:00

The LL/SC and IRQ versions were using generic stubs while the GRB version
was just reimplementing what it already had for the standard cmpxchg()
code. As we have optimized cmpxchg() implementations that are decoupled
from the atomic code, simply falling back on the generic wrapper does the
right thing. With this in place the GRB case is unaffected while the
LL/SC case gets to use its optimized cmpxchg().

Signed-off-by: Paul Mundt

sh: Fix up smp_mb__xxx() memory barriers for SH-4A SMP.

2009-10-18T06:36:02+00:00

In the past these were simply wrapping to barrier() which was sufficient
on SH SMP platforms predating SH-4A. Unfortunately due to ll/sc semantics
an explicit synco is needed in these cases, which is sorted for us by
just switching these over to smp_mb(). smp_mb() also has the benefit of
being wrapped to barrier() in the UP and non-SH4A cases, so old behaviour
is maintained for those parts.

Signed-off-by: Paul Mundt

sh: Use generic atomic64_t implementation.

2009-06-17T01:43:13+00:00

Signed-off-by: Paul Mundt

asm-generic: merge branch 'master' of torvalds/linux-2.6

2009-06-12T09:32:58+00:00

Fixes a merge conflict against the x86 tree caused by a fix to
atomic.h which I renamed to atomic_long.h.

Signed-off-by: Arnd Bergmann

asm-generic: rename atomic.h to atomic-long.h

2009-06-11T19:02:17+00:00

The existing asm-generic/atomic.h only defines the
atomic_long type. This renames it to atomic-long.h
so we have a place to add a truly generic atomic.h
that can be used on all non-SMP systems.

Signed-off-by: Remis Lima Baima 
Signed-off-by: Arnd Bergmann 
Acked-by: Ingo Molnar

sh: Fix sh4a llsc-based cmpxchg()

2009-06-11T06:31:55+00:00

This fixes up a typo in the ll/sc based cmpxchg code which apparently
wasn't getting a lot of testing due to the swapped old/new pair. With
that fixed up, the ll/sc code also starts using it and provides its own
atomic_add_unless().

Signed-off-by: Aoi Shinkai 
Signed-off-by: Paul Mundt

atomic_t: unify all arch definitions

2009-01-06T23:59:10+00:00

The atomic_t type cannot currently be used in some header files because it
would create an include loop with asm/atomic.h.  Move the type definition
to linux/types.h to break the loop.

Signed-off-by: Matthew Wilcox 
Cc: Huang Ying 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

sh: migrate to arch/sh/include/

2008-07-28T23:09:44+00:00

This follows the sparc changes a439fe51a1f8eb087c22dd24d69cebae4a3addac.

Most of the moving about was done with Sam's directions at:

http://marc.info/?l=linux-sh&m=121724823706062&w=2

with subsequent hacking and fixups entirely my fault.

Signed-off-by: Sam Ravnborg 
Signed-off-by: Paul Mundt