• Leonid Yegoshin's avatar
    MIPS: Replace smp_mb with release barrier function in unlocks. · 6f6ed482
    Leonid Yegoshin authored
    Repleace smp_mb() in arch_write_unlock() and __clear_bit_unlock() to
    smp_mb__before_llsc() call which does "release" barrier functionality.
    
    It seems like it was missed in commit f252ffd5
    during introduction of "acquire" and "release" semantics.
    
    [ralf@linux-mips: The original patch submission was labelled a fix but
    actually it replaces a barrier with another less restrictive type of
    barrier so it doesn't fix any ill behaviour but rather squeezes out a
    tad better performance.  Further improvments will be possible once
    smp_release() has been merged.]
    Signed-off-by: default avatarLeonid Yegoshin <Leonid.Yegoshin@imgtec.com>
    Cc: linux-mips@linux-mips.org
    Cc: benh@kernel.crashing.org
    Cc: will.deacon@arm.com
    Cc: linux-kernel@vger.kernel.org
    Cc: markos.chandras@imgtec.com
    Cc: macro@linux-mips.org
    Cc: Steven.Hill@imgtec.com
    Cc: alexander.h.duyck@redhat.com
    Cc: davem@davemloft.net
    Patchwork: https://patchwork.linux-mips.org/patch/10507/Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
    6f6ed482
spinlock.h 10.6 KB