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| > Also, set_mask_bits is used in fs quite a bit and we can possibly come up | > with a generic llsc based implementation (w/o the cmpxchg loop) | | May I also suggest changing the return value of set_mask_bits() to old. | | You can compute the new value given old, but you cannot compute the old | value given new, therefore old is the better return value. Also, no | current user seems to use the return value, so changing it is without | risk. Link: http://lkml.kernel.org/g/20150807110955.GH16853@twins.programming.kicks-ass.net Link: http://lkml.kernel.org/r/1548275584-18096-4-git-send-email-vgupta@synopsys.com Signed-off-by: Vineet Gupta <vgupta@synopsys.com> Suggested-by: Peter Zijlstra <peterz@infradead.org> Reviewed-by: Anthony Yznaga <anthony.yznaga@oracle.com> Acked-by: Will Deacon <will.deacon@arm.com> Cc: Miklos Szeredi <mszeredi@redhat.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jani Nikula <jani.nikula@intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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