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    Subject[RFC][PATCH] fix abs() macro to work with types wider than int

    is there any reason to use an explicit int instead of a typeof in
    the abs() macro? The current implementation will return bogus
    results when used with longs.

    How about changing the int to a typeof like this?:

    Fix the abs() macro to work with wider types than int.

    Signed-off-by: Jiri Bohac <>

    --- linux-2.6.21-rc5.orig/include/linux/kernel.h
    +++ linux-2.6.21-rc5/include/linux/kernel.h
    @@ -89,7 +89,7 @@ extern int cond_resched(void);
    #define might_sleep_if(cond) do { if (cond) might_sleep(); } while (0)

    #define abs(x) ({ \
    - int __x = (x); \
    + typeof(x) __x = (x); \
    (__x < 0) ? -__x : __x; \

    Jiri Bohac <>
    SUSE Labs, SUSE CZ

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      Last update: 2007-04-19 11:23    [W:0.019 / U:9.424 seconds]
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