diff options
author | Takashi Iwai <tiwai@suse.de> | 2014-11-17 22:16:03 +0100 |
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committer | Takashi Iwai <tiwai@suse.de> | 2014-11-17 22:16:03 +0100 |
commit | 39ae97ea4b773be81bae9eec08ed1e5c53606c1a (patch) | |
tree | 4d55635fb46a86b970c1491cc529eb2770bf3076 /arch/sparc/lib/atomic32.c | |
parent | a358a0ef861dae6f8330fb034aaa43adae71ebc1 (diff) | |
parent | cf9a7f7823c67243da44da2ac47ca944a3108282 (diff) |
Merge tag 'asoc-v3.18-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus
ASoC: Fixes for v3.18
As well as the usual driver fixes there's a few other things here:
One is a fix for a race in DPCM which is unfortuantely a rather large
diffstat, this is the result of growing usage of the mainline code and
hence more detailed testing so I'm relatively happy.
The other is a fix for non-DT machine driver matching following some of
the componentization work which is much more focused.
Both have had a while to cook in -next.
Diffstat (limited to 'arch/sparc/lib/atomic32.c')
-rw-r--r-- | arch/sparc/lib/atomic32.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/arch/sparc/lib/atomic32.c b/arch/sparc/lib/atomic32.c index a7c418ac26af..71cd65ab200c 100644 --- a/arch/sparc/lib/atomic32.c +++ b/arch/sparc/lib/atomic32.c @@ -45,6 +45,19 @@ ATOMIC_OP(add, +=) #undef ATOMIC_OP +int atomic_xchg(atomic_t *v, int new) +{ + int ret; + unsigned long flags; + + spin_lock_irqsave(ATOMIC_HASH(v), flags); + ret = v->counter; + v->counter = new; + spin_unlock_irqrestore(ATOMIC_HASH(v), flags); + return ret; +} +EXPORT_SYMBOL(atomic_xchg); + int atomic_cmpxchg(atomic_t *v, int old, int new) { int ret; @@ -137,3 +150,17 @@ unsigned long __cmpxchg_u32(volatile u32 *ptr, u32 old, u32 new) return (unsigned long)prev; } EXPORT_SYMBOL(__cmpxchg_u32); + +unsigned long __xchg_u32(volatile u32 *ptr, u32 new) +{ + unsigned long flags; + u32 prev; + + spin_lock_irqsave(ATOMIC_HASH(ptr), flags); + prev = *ptr; + *ptr = new; + spin_unlock_irqrestore(ATOMIC_HASH(ptr), flags); + + return (unsigned long)prev; +} +EXPORT_SYMBOL(__xchg_u32); |