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atomic_ops.txt: mention local_t

local_t is a variant of atomic_t and has related ops to match.
Add reference for local_t documentation to atomic_ops.txt.

Signed-off-by: Grant Grundler <grundler@parisc-linux.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Grant Grundler 17 years ago
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74beb9db77
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1a2142b08c
1 changed files with 4 additions and 0 deletions
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      Documentation/atomic_ops.txt

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Documentation/atomic_ops.txt
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@@ -14,6 +14,10 @@ suffice:
 
 
 
 	typedef struct { volatile int counter; } atomic_t;
 
 	typedef struct { volatile int counter; } atomic_t;
 
 
 
+local_t is very similar to atomic_t. If the counter is per CPU and only
 
+updated by one CPU, local_t is probably more appropriate. Please see
 
+Documentation/local_ops.txt for the semantics of local_t.
 
+
 
 	The first operations to implement for atomic_t's are the
 
 	The first operations to implement for atomic_t's are the
 
 initializers and plain reads.
 
 initializers and plain reads.