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    Subject[PATCH] 2.5.46: overflow in disk stats
    Date
    Hi,

    I see that the SARD changes have been merged, but MSEC() still has
    the overflow problem. This takes care of it:

    --------------------------------------------------------------------------------------------------

    diff -urN linux-2.5.46.orig/drivers/block/genhd.c
    linux-2.5.46/drivers/block/genhd.c
    --- linux-2.5.46.orig/drivers/block/genhd.c Tue Nov 5 15:15:07 2002
    +++ linux-2.5.46/drivers/block/genhd.c Tue Nov 5 16:14:35 2002
    @@ -326,7 +326,13 @@
    }
    static inline unsigned MSEC(unsigned x)
    {
    - return x * 1000 / HZ;
    +#if 1000 % HZ == 0
    + return x * (1000 / HZ);
    +#elif HZ % 1000 == 0
    + return x / (HZ / 1000);
    +#else
    + return (x / HZ) * 1000 + (x % HZ) * 1000 / HZ;
    +#endif
    }
    static ssize_t disk_stat_read(struct gendisk * disk,
    char *page, size_t count, loff_t off)
    -
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