Merge branch 'locking-arch-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull arch atomic cleanups from Ingo Molnar:
 "This is a series kept separate from the main locking tree, which
  cleans up and improves various details in the atomics type handling:

   - Remove the unused atomic_or_long() method

   - Consolidate and compress atomic ops implementations between
     architectures, to reduce linecount and to make it easier to add new
     ops.

   - Rewrite generic atomic support to only require cmpxchg() from an
     architecture - generate all other methods from that"

* 'locking-arch-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (23 commits)
  locking,arch: Use ACCESS_ONCE() instead of cast to volatile in atomic_read()
  locking, mips: Fix atomics
  locking, sparc64: Fix atomics
  locking,arch: Rewrite generic atomic support
  locking,arch,xtensa: Fold atomic_ops
  locking,arch,sparc: Fold atomic_ops
  locking,arch,sh: Fold atomic_ops
  locking,arch,powerpc: Fold atomic_ops
  locking,arch,parisc: Fold atomic_ops
  locking,arch,mn10300: Fold atomic_ops
  locking,arch,mips: Fold atomic_ops
  locking,arch,metag: Fold atomic_ops
  locking,arch,m68k: Fold atomic_ops
  locking,arch,m32r: Fold atomic_ops
  locking,arch,ia64: Fold atomic_ops
  locking,arch,hexagon: Fold atomic_ops
  locking,arch,cris: Fold atomic_ops
  locking,arch,avr32: Fold atomic_ops
  locking,arch,arm64: Fold atomic_ops
  locking,arch,arm: Fold atomic_ops
  ...

1 files changed, 17 insertions, 12 deletions

diff --git a/arch/sparc/lib/atomic32.c b/arch/sparc/lib/atomic32.c
index 1d32b54089aa..a7c418ac26af 100644
--- a/arch/sparc/lib/atomic32.c
+++ b/arch/sparc/lib/atomic32.c
@@ -27,18 +27,23 @@ static DEFINE_SPINLOCK(dummy);
 
 #endif /* SMP */
 
-int __atomic_add_return(int i, atomic_t *v)
-{
-        int ret;
-        unsigned long flags;
-        spin_lock_irqsave(ATOMIC_HASH(v), flags);
-
-        ret = (v->counter += i);
-
-        spin_unlock_irqrestore(ATOMIC_HASH(v), flags);
-        return ret;
-}
-EXPORT_SYMBOL(__atomic_add_return);
+#define ATOMIC_OP(op, cop)                                              \
+int atomic_##op##_return(int i, atomic_t *v)                            \
+{                                                                       \
+        int ret;                                                        \
+        unsigned long flags;                                            \
+        spin_lock_irqsave(ATOMIC_HASH(v), flags);                       \
+                                                                        \
+        ret = (v->counter cop i);                                       \
+                                                                        \
+        spin_unlock_irqrestore(ATOMIC_HASH(v), flags);                  \
+        return ret;                                                     \
+}                                                                       \
+EXPORT_SYMBOL(atomic_##op##_return);
+
+ATOMIC_OP(add, +=)
+
+#undef ATOMIC_OP
 
 int atomic_cmpxchg(atomic_t *v, int old, int new)
 {