atomic: Update comments in atomic.h

This clarifies the differences between <linux/atomic.h> and <asm-generic/atomic.h> Signed-off-by: Arun Sharma <asharma@fb.com> Suggested-by: Mike Frysinger <vapier.adi@gmail.com> Cc: Eric Dumazet <eric.dumazet@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: David Miller <davem@davemloft.net> Acked-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
ghostidear · Jul 26, 2011 · acac43e · acac43e
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commit acac43e
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diff --git a/include/asm-generic/atomic.h b/include/asm-generic/atomic.h
@@ -1,5 +1,7 @@
 /*
- * Generic C implementation of atomic counter operations
+ * Generic C implementation of atomic counter operations. Usable on
+ * UP systems only. Do not include in machine independent code.
+ *
  * Originally implemented for MN10300.
  *
  * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.

diff --git a/include/linux/atomic.h b/include/linux/atomic.h
@@ -1,3 +1,4 @@
+/* Atomic operations usable in machine independent code */
 #ifndef _LINUX_ATOMIC_H
 #define _LINUX_ATOMIC_H
 #include <asm/atomic.h>