• George Spelvin's avatar
    Change hash_64() return value to 32 bits · 92d56774
    George Spelvin authored
    That's all that's ever asked for, and it makes the return
    type of hash_long() consistent.
    It also allows (upcoming patch) an optimized implementation
    of hash_64 on 32-bit machines.
    I tried adding a BUILD_BUG_ON to ensure the number of bits requested
    was never more than 32 (most callers use a compile-time constant), but
    adding <linux/bug.h> to <linux/hash.h> breaks the tools/perf compiler
    unless tools/perf/MANIFEST is updated, and understanding that code base
    well enough to update it is too much trouble.  I did the rest of an
    allyesconfig build with such a check, and nothing tripped.
    Signed-off-by: default avatarGeorge Spelvin <linux@sciencehorizons.net>