• Paul Burton's avatar
    MIPS: bitops: Use BIT_WORD() & BITS_PER_LONG · c042be02
    Paul Burton authored
    Rather than using custom SZLONG_LOG & SZLONG_MASK macros to shift & mask
    a bit index to form word & bit offsets respectively, make use of the
    standard BIT_WORD() & BITS_PER_LONG macros for the same purpose.
    
    volatile is added to the definition of pointers to the long-sized word
    we'll operate on, in order to prevent the compiler complaining that we
    cast away the volatile qualifier of the addr argument. This should have
    no effect on generated code, which in the LL/SC case is inline asm
    anyway & in the non-LLSC case access is constrained by compiler barriers
    provided by raw_local_irq_{save,restore}().
    Signed-off-by: default avatarPaul Burton <paul.burton@mips.com>
    Cc: linux-mips@vger.kernel.org
    Cc: Huacai Chen <chenhc@lemote.com>
    Cc: Jiaxun Yang <jiaxun.yang@flygoat.com>
    Cc: linux-kernel@vger.kernel.org
    c042be02
bitops.c 3.75 KB