Vineet Gupta 69cbe630f5 ARC: LLOCK/SCOND based rwlock ... With LLOCK/SCOND, the rwlock counter can be atomically updated w/o need for a guarding spin lock. This in turn elides the EXchange instruction based spinning which causes the cacheline transition to exclusive state and concurrent spinning across cores would cause the line to keep bouncing around. LLOCK/SCOND based implementation is superior as spinning on LLOCK keeps the cacheline in shared state. Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>		2015-08-04 09:26:33 +05:30
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asm	ARC: LLOCK/SCOND based rwlock	2015-08-04 09:26:33 +05:30
uapi/asm	ARC: mm: document system mem map clearly	2015-06-19 18:09:29 +05:30