BMC/Intel-BMC/linux.git/arch/sh/include/asm/mutex-llsc.h, branch dev

arch: Make __mutex_fastpath_lock_retval return whether fastpath succeeded or not

2013-06-26T10:10:55+00:00

This will allow me to call functions that have multiple arguments if fastpath fails. This is required to support ticket mutexes, because they need to be able to pass an extra argument to the fail function. Originally I duplicated the functions, by adding __mutex_fastpath_lock_retval_arg. This ended up being just a duplication of the existing function, so a way to test if fastpath was called ended up being better. This also cleaned up the reservation mutex patch some by being able to call an atomic_set instead of atomic_xchg, and making it easier to detect if the wrong unlock function was previously used. Signed-off-by: Maarten Lankhorst Acked-by: Peter Zijlstra Cc: dri-devel@lists.freedesktop.org Cc: linaro-mm-sig@lists.linaro.org Cc: robclark@gmail.com Cc: rostedt@goodmis.org Cc: daniel@ffwll.ch Cc: Linus Torvalds Cc: Andrew Morton Cc: Thomas Gleixner Link: http://lkml.kernel.org/r/20130620113105.4001.83929.stgit@patser Signed-off-by: Ingo Molnar

sh: Fix up T-bit error handling in SH-4A mutex fastpath.

2009-01-29T02:56:03+00:00

This corrects a deadlock encountered on ap325 in the cases where the mutex is contended and the slow-path needs to be fallen back upon. Signed-off-by: Takashi YOSHII Signed-off-by: Kuninori Morimoto Signed-off-by: Paul Mundt

sh: Fix an off-by-1 check in __mutex_fastpath_unlock().

2008-12-22T09:44:02+00:00

Signed-off-by: Paul Mundt

sh: Fix up the SH-4A mutex fastpath semantics.

2008-12-22T09:43:52+00:00

This fixes up the __mutex_fastpath_xxx() routines to match the semantics noted in the comment. Previously these were looping rather than doing a single-pass, which is counter-intuitive, as the slow path takes care of the looping for us in the event of contention. Signed-off-by: Paul Mundt

sh: Add SH-4A optimized fastpath mutex implementation.

2008-12-22T09:42:55+00:00

Add fast mutex path implementation for the SH4A architecture Signed-off-by: Michael Trimarchi Signed-off-by: Paul Mundt