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atomic_ops.txt: mention local_t

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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>
This commit is contained in:
Grant Grundler
2007-10-16 23:29:28 -07:00
committed by Linus Torvalds
parent 74beb9db77
commit 1a2142b08c
1 changed files with 4 additions and 0 deletions
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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.