linux.git/include/asm-s390/atomic.h, branch master

[S390] move include/asm-s390 to arch/s390/include/asm

2008-08-01T18:42:05+00:00

Signed-off-by: Martin Schwidefsky

[S390] Change atomic_read/set to inline functions with barrier semantics.

2007-08-22T11:51:49+00:00

After doing some tests this seems to be the best variant for s390 and
should be correct as well. With gcc 4.2.1 we get the following kernel
image sizes using the default configuration:

atomic_t type volatile, atomic_read/set defines   5311824 bytes
atomic_t type int, atomic_read/set defines        5270864 bytes
atomic_t type int, atomic_read/set inline asm     5279056 bytes
atomic_t type int, atomic_read/set inline barrier 5270864 bytes

Signed-off-by: Heiko Carstens 
Signed-off-by: Martin Schwidefsky

[S390] Remove volatile from atomic_t

2007-07-10T09:24:49+00:00

Follow i386/x86_64 and remove 'volatile' from atomic_t.

Signed-off-by: Heiko Carstens 
Signed-off-by: Martin Schwidefsky

[S390] add atomic64_xchg to s390

2007-02-21T09:55:59+00:00

Signed-off-by: Mathieu Desnoyers 
Cc: Heiko Carstens 
Signed-off-by: Andrew Morton 
Signed-off-by: Martin Schwidefsky

[S390] Inline assembly cleanup.

2006-09-28T14:56:43+00:00

Major cleanup of all s390 inline assemblies. They now have a common
coding style. Quite a few have been shortened, mainly by using register
asm variables. Use of the EX_TABLE macro helps  as well. The atomic ops,
bit ops and locking inlines new use the Q-constraint if a newer gcc
is used.  That results in slightly better code.

Thanks to Christian Borntraeger for proof reading the changes.

Signed-off-by: Martin Schwidefsky

[PATCH] S390: fix implicit declaration of (un)likely.

2006-04-11T13:18:39+00:00

include/asm/atomic.h:94: warning: implicit declaration of function 'unlikely'
include/asm/atomic.h:97: warning: implicit declaration of function 'likely'

Signed-off-by: Dave Jones 
Cc: Martin Schwidefsky 
Cc: Heiko Carstens 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] atomic: add_unless cmpxchg optimise

2006-03-23T15:38:17+00:00

Without branch hints, the very unlikely chance of the loop repeating due to
cmpxchg failure is unrolled with gcc-4 that I have tested.

Improve this for architectures with a native cas/cmpxchg.  llsc archs
should try to implement this natively.

Signed-off-by: Nick Piggin 
Cc: Andi Kleen 
Cc: Martin Schwidefsky 
Cc: Heiko Carstens 
Cc: "David S. Miller" 
Cc: Roman Zippel 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] mutex subsystem, add atomic_xchg() to all arches

2006-01-09T23:59:17+00:00

add atomic_xchg() to all the architectures. Needed by the new mutex code.

Signed-off-by: Ingo Molnar 
Signed-off-by: Arjan van de Ven

[PATCH] s390: atomic primitives

2006-01-06T16:33:48+00:00

      Hugh Dickins 

Fix the broken atomic_cmpxchg primitive.  Add atomic_sub_and_test,
atomic64_sub_return, atomic64_sub_and_test, atomic64_cmpxchg,
atomic64_add_unless and atomic64_inc_not_zero.  Replace old style
atomic_compare_and_swap by atomic_cmpxchg.  Shorten the whole header by
defining most primitives with the two inline functions atomic_add_return and
atomic_sub_return.

In addition this patch contains the s390 related fixes of Hugh's "mm: fill
arch atomic64 gaps" patch.

Signed-off-by: Martin Schwidefsky 
Signed-off-by: Hugh Dickins 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] atomic_long_t & include/asm-generic/atomic.h V2

2006-01-06T16:33:29+00:00

Several counters already have the need to use 64 atomic variables on 64 bit
platforms (see mm_counter_t in sched.h).  We have to do ugly ifdefs to fall
back to 32 bit atomic on 32 bit platforms.

The VM statistics patch that I am working on will also make more extensive
use of atomic64.

This patch introduces a new type atomic_long_t by providing definitions in
asm-generic/atomic.h that works similar to the c "long" type.  Its 32 bits
on 32 bit platforms and 64 bits on 64 bit platforms.

Also cleans up the determination of the mm_counter_t in sched.h.

Signed-off-by: Christoph Lameter 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds