Guo Ren c5acdf12cc csky: atomic: Add conditional atomic operations' optimization ... Add conditional atomic operations' optimization: - arch_atomic_fetch_add_unless - arch_atomic_inc_unless_negative - arch_atomic_dec_unless_positive - arch_atomic_dec_if_positive Comments by Boqun: FWIW, you probably need to make sure that a barrier instruction inside an lr/sc loop is a good thing. IIUC, the execution time of a barrier instruction is determined by the status of store buffers and invalidate queues (and probably other stuffs), so it may increase the execution time of the lr/sc loop, and make it unlikely to succeed. But this really depends on how the arch executes these instructions. Signed-off-by: Guo Ren <guoren@linux.alibaba.com> Signed-off-by: Guo Ren <guoren@kernel.org> Cc: Boqun Feng <boqun.feng@gmail.com>		2022-04-25 13:51:43 +08:00
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asm	csky: atomic: Add conditional atomic operations' optimization	2022-04-25 13:51:43 +08:00
uapi/asm	csky: Fixup compile error	2021-02-27 22:04:14 +08:00