Re: [PATCH v2 1/5] csky: Remove custom asm/atomic.h implementation
From: Peter Zijlstra <peterz@infradead.org>
Date: 2021-01-07 11:20:46
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On Sun, Dec 20, 2020 at 03:39:19PM +0000, guoren@kernel.org wrote:
From: Guo Ren <redacted> Use generic atomic implementation based on cmpxchg. So remove csky asm/atomic.h.
Clarification would be good. Typically cmpxchg() loops perform sub-optimal on LL/SC architectures, due to the double loop construction.