Eric Lee / smarc-fsl-linux-kernel

13 Aug, 2014

1 commit

  • 7608a43d8   locking/mutexes: Use MUTEX_SPIN_ON_OWNER when appropriate ... Browse Code »

    4badad35 ("locking/mutex: Disable optimistic spinning on some
    architectures") added a ARCH_SUPPORTS_ATOMIC_RMW flag to
    disable the mutex optimistic feature on specific archs.

    Because CONFIG_MUTEX_SPIN_ON_OWNER only depended on DEBUG and
    SMP, it was ok to have the ->owner field conditional a bit
    flexible. However by adding a new variable to the matter,
    we can waste space with the unused field, ie: CONFIG_SMP &&
    (!CONFIG_MUTEX_SPIN_ON_OWNER && !CONFIG_DEBUG_MUTEX).

    Signed-off-by: Davidlohr Bueso
    Acked-by: Jason Low
    Signed-off-by: Peter Zijlstra
    Cc: aswin@hp.com
    Cc: Davidlohr Bueso
    Cc: Heiko Carstens
    Cc: Jason Low
    Cc: Linus Torvalds
    Cc: Paul E. McKenney
    Cc: Tim Chen
    Link: http://lkml.kernel.org/r/1406752916-3341-5-git-send-email-davidlohr@hp.com
    Signed-off-by: Ingo Molnar

    Davidlohr Bueso
     

06 Nov, 2013

1 commit