On Thu, 26 May 2011 14:38:43 -0400 (EDT) David Miller wrote:
> From: Joe Perches <joe@xxxxxxxxxxx>
> Date: Thu, 26 May 2011 08:31:06 -0700
>
> > My suggestion would be to see about again adding
> > #include <linux/ratelimit.h> somehow
> > back to kernel.h which commit 3fff4c42bd0a removed
> > in 2009 because of the spinlock issues.
> >
> > Any suggestion on how best to fix it generically?
>
> I don't think we want spinlock_t's definition being sucked
> into kernel.h's dependency food chain.
>
> Even if desirable, I think it'd be quite a bit of surgery,
> too much to do at this stage.
>
> So for now how about we make the ratelimit warn interfaces be a true,
> instead of a pseudo, dependency on ratelimit.h by moving those
> definitions into ratelimit.h?
Works for me. Thanks.
Acked-by: Randy Dunlap <randy.dunlap@xxxxxxxxxx>
> diff --git a/include/asm-generic/bug.h b/include/asm-generic/bug.h
> index 9178484..dfb0ec6 100644
> --- a/include/asm-generic/bug.h
> +++ b/include/asm-generic/bug.h
> @@ -162,46 +162,6 @@ extern void warn_slowpath_null(const char *file, const int line);
> unlikely(__ret_warn_once); \
> })
>
> -#ifdef CONFIG_PRINTK
> -
> -#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); \
> -})
> -
> -#else
> -
> -#define WARN_ON_RATELIMIT(condition, state) \
> - WARN_ON(condition)
> -
> -#define __WARN_RATELIMIT(condition, state, format...) \
> -({ \
> - int rtn = WARN(condition, format); \
> - rtn; \
> -})
> -
> -#define WARN_RATELIMIT(condition, format...) \
> -({ \
> - int rtn = WARN(condition, format); \
> - rtn; \
> -})
> -
> -#endif
> -
> /*
> * WARN_ON_SMP() is for cases that the warning is either
> * meaningless for !SMP or may even cause failures.
> diff --git a/include/linux/ratelimit.h b/include/linux/ratelimit.h
> index 03ff67b..2f00715 100644
> --- a/include/linux/ratelimit.h
> +++ b/include/linux/ratelimit.h
> @@ -41,4 +41,44 @@ extern struct ratelimit_state printk_ratelimit_state;
> extern int ___ratelimit(struct ratelimit_state *rs, const char *func);
> #define __ratelimit(state) ___ratelimit(state, __func__)
>
> +#ifdef CONFIG_PRINTK
> +
> +#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); \
> +})
> +
> +#else
> +
> +#define WARN_ON_RATELIMIT(condition, state) \
> + WARN_ON(condition)
> +
> +#define __WARN_RATELIMIT(condition, state, format...) \
> +({ \
> + int rtn = WARN(condition, format); \
> + rtn; \
> +})
> +
> +#define WARN_RATELIMIT(condition, format...) \
> +({ \
> + int rtn = WARN(condition, format); \
> + rtn; \
> +})
> +
> +#endif
> +
> #endif /* _LINUX_RATELIMIT_H */
> diff --git a/net/core/filter.c b/net/core/filter.c
> index 0e3622f..36f975f 100644
> --- a/net/core/filter.c
> +++ b/net/core/filter.c
> @@ -38,6 +38,7 @@
> #include <asm/unaligned.h>
> #include <linux/filter.h>
> #include <linux/reciprocal_div.h>
> +#include <linux/ratelimit.h>
>
> /* No hurry in this branch */
> static void *__load_pointer(const struct sk_buff *skb, int k, unsigned int size)
> --
---
~Randy
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