• Linus Torvalds's avatar
    smp: don't use 16-bit words for atomic accesses · f4d03bd1
    Linus Torvalds authored
    Yes, it should work, but it's a bad idea.  Not only did ARM64 not have
    the 16-bit access code (there's a separate patch to add it), it's just
    not a good atomic type.  Some architectures fundamentally don't do
    atomic accesses in them (alpha), and it's not like it saves any space
    here anyway because of structure packing issues.
    
    We normally should aim for flags to be "unsigned int" or "unsigned
    long".  And if space is at a premium, use a single byte (although that
    causes problems on alpha again).  There might be very special cases
    where a 16-byte entity is really wanted, but this is not one of them.
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    f4d03bd1
smp.h 5.09 KB