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| author | Joe Perches <joe@perches.com> | 2011-05-21 07:48:39 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-05-23 17:37:43 -0400 |
| commit | b3eec79b0776e5340a3db75b34953977c7e5086e (patch) | |
| tree | 33f6c56a27e8503fa2881632f35c80618a00a888 /include | |
| parent | 8efa885406359af300d46910642b50ca82c0fe47 (diff) | |
| download | lwn-b3eec79b0776e5340a3db75b34953977c7e5086e.tar.gz lwn-b3eec79b0776e5340a3db75b34953977c7e5086e.zip | |
bug.h: Add WARN_RATELIMIT
Add a generic mechanism to ratelimit WARN(foo, fmt, ...) messages
using a hidden per call site static struct ratelimit_state.
Also add an __WARN_RATELIMIT variant to be able to use a specific
struct ratelimit_state.
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
| -rw-r--r-- | include/asm-generic/bug.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/include/asm-generic/bug.h b/include/asm-generic/bug.h index e5a3f5880001..12b250cdda81 100644 --- a/include/asm-generic/bug.h +++ b/include/asm-generic/bug.h @@ -165,6 +165,22 @@ extern void warn_slowpath_null(const char *file, const int line); #define WARN_ON_RATELIMIT(condition, state) \ WARN_ON((condition) && __ratelimit(state)) +#define __WARN_RATELIMIT(condition, state, format...) \ +({ \ + int rtn = 0; \ + if (unlikely(__ratelimit(state))) \ + rtn = WARN(condition, format); \ + rtn; \ +}) + +#define WARN_RATELIMIT(condition, format...) \ +({ \ + static DEFINE_RATELIMIT_STATE(_rs, \ + DEFAULT_RATELIMIT_INTERVAL, \ + DEFAULT_RATELIMIT_BURST); \ + __WARN_RATELIMIT(condition, &_rs, format); \ +}) + /* * WARN_ON_SMP() is for cases that the warning is either * meaningless for !SMP or may even cause failures. |