• Jason Low's avatar
    locking/mutex: Further simplify mutex_spin_on_owner() · 01ac33c1
    Jason Low authored
    Similar to what Linus suggested for rwsem_spin_on_owner(), in
    mutex_spin_on_owner() instead of having while (true) and
    breaking out of the spin loop on lock->owner != owner, we can
    have the loop directly check for while (lock->owner == owner) to
    improve the readability of the code.
    
    It also shrinks the code a bit:
    
       text    data     bss     dec     hex filename
       3721       0       0    3721     e89 mutex.o.before
       3705       0       0    3705     e79 mutex.o.after
    Signed-off-by: default avatarJason Low <jason.low2@hp.com>
    Cc: Andrew Morton <akpm@linux-foundation.org>
    Cc: Aswin Chandramouleeswaran <aswin@hp.com>
    Cc: Davidlohr Bueso <dave@stgolabs.net>
    Cc: Linus Torvalds <torvalds@linux-foundation.org>
    Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Cc: Tim Chen <tim.c.chen@linux.intel.com>
    Link: http://lkml.kernel.org/r/1428521960-5268-2-git-send-email-jason.low2@hp.com
    [ Added code generation info. ]
    Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
    01ac33c1
mutex.c 25.1 KB