locking/rwsem: Micro-optimize rwsem_try_read_lock_unqueued()
The atomic_long_cmpxchg_acquire() in rwsem_try_read_lock_unqueued() is replaced by atomic_long_try_cmpxchg_acquire() to simpify the code and generate slightly better assembly code. There is no functional change. Signed-off-by:Waiman Long <longman@redhat.com> Acked-by:
Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by:
Will Deacon <will.deacon@arm.com> Acked-by:
Davidlohr Bueso <dbueso@suse.de> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Borislav Petkov <bp@alien8.de> 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/20190404174320.22416-5-longman@redhat.com Signed-off-by:
Ingo Molnar <mingo@kernel.org>
parent
12a30a7f
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