[tip:perfcounters/core] x86, perfcounters: add atomic64_xchg()

[Ingo Molnar]

Commit-ID:  b226fa12991d6ee9b6b13a7e1de88ec5d25f5007
Gitweb:     http://git.kernel.org/tip/b226fa12991d6ee9b6b13a7e1de88ec5d25f5007
Author:     Ingo Molnar <mingo@xxxxxxx>
AuthorDate: Tue, 7 Apr 2009 11:30:17 +0200
Committer:  Ingo Molnar <mingo@xxxxxxx>
CommitDate: Tue, 7 Apr 2009 11:32:43 +0200

x86, perfcounters: add atomic64_xchg()

Complete atomic64_t support on the 32-bit side by adding atomic64_xch().

Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
LKML-Reference: <20090406094518.445450972@xxxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>


---
 arch/x86/include/asm/atomic_32.h |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/arch/x86/include/asm/atomic_32.h b/arch/x86/include/asm/atomic_32.h
index 977250e..a9fef6c 100644
--- a/arch/x86/include/asm/atomic_32.h
+++ b/arch/x86/include/asm/atomic_32.h
@@ -306,6 +306,12 @@ static inline void atomic64_set(atomic64_t *ptr, unsigned long long new_val)
 	} while (atomic64_cmpxchg(ptr, old_val, new_val) != old_val);
 }
 
+static inline void
+atomic64_xchg(atomic64_t *ptr, unsigned long long new_val)
+{
+	atomic64_set(ptr, new_val);
+}
+
 /**
  * atomic64_read - read atomic64 variable
  * @ptr:      pointer to type atomic64_t
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/