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| author | Joe Perches <joe@perches.com> | 2011-05-21 07:48:39 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-07-13 05:31:26 +0200 |
| commit | 7cad013caa9a0f16f47b1b5139b67bdf1bf5c7d1 (patch) | |
| tree | 37426e6d541d87565fd96d51a656c196e04ccb60 | |
| parent | 386f12d6c880e3c7b9a31da1c7b5cca3500470d0 (diff) | |
| download | lwn-7cad013caa9a0f16f47b1b5139b67bdf1bf5c7d1.tar.gz lwn-7cad013caa9a0f16f47b1b5139b67bdf1bf5c7d1.zip | |
bug.h: Add WARN_RATELIMIT
[ Upstream commit b3eec79b0776e5340a3db75b34953977c7e5086e ]
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -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 18c435d7c082..244adb718c05 100644 --- a/include/asm-generic/bug.h +++ b/include/asm-generic/bug.h @@ -50,6 +50,22 @@ struct bug_entry { #define BUG_ON(condition) do { if (unlikely(condition)) BUG(); } while(0) #endif +#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(), WARN_ON(), WARN_ON_ONCE, and so on can be used to report * significant issues that need prompt attention if they should ever |