Uros Bizjak 4f1d2a030d llist: use try_cmpxchg in llist_add_batch and llist_del_first
Use try_cmpxchg instead of cmpxchg (*ptr, old, new) == old in
llist_add_batch and llist_del_first.  x86 CMPXCHG instruction returns
success in ZF flag, so this change saves a compare after cmpxchg.

Also, try_cmpxchg implicitly assigns old *ptr value to "old" when cmpxchg
fails, enabling further code simplifications.

No functional change intended.

Link: https://lkml.kernel.org/r/20220712144917.4497-1-ubizjak@gmail.com
Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2022-09-11 21:55:06 -07:00
..
2022-05-09 17:20:37 -07:00
2021-07-08 11:48:20 -07:00
2021-09-08 11:50:26 -07:00
2021-07-08 11:48:20 -07:00
2021-07-08 11:48:20 -07:00
2021-11-18 13:16:22 -08:00
2021-05-06 19:24:12 -07:00
2022-08-07 17:52:35 -07:00
2018-08-16 12:14:42 -07:00
2021-01-21 14:06:00 -07:00
2022-03-07 12:48:35 -07:00
2021-08-19 09:02:55 +09:00
2022-04-22 21:30:57 +02:00
2021-01-03 20:05:18 -05:00
2022-01-15 08:47:31 -08:00
2022-03-07 12:48:35 -07:00
2022-04-29 14:38:01 -07:00
2022-07-10 13:55:49 -07:00
2021-08-19 09:02:55 +09:00
2021-07-08 11:48:20 -07:00
2021-07-08 11:48:20 -07:00
2018-10-16 13:45:44 +02:00
2022-06-12 14:51:51 +08:00
2021-07-08 11:48:20 -07:00
2021-07-08 11:48:20 -07:00
2021-08-08 13:00:20 +01:00
2021-09-17 13:52:17 +01:00
2021-07-08 11:48:20 -07:00
2021-07-08 11:48:20 -07:00
2021-07-08 11:48:20 -07:00
2022-06-03 10:34:34 -07:00
2022-04-29 14:38:01 -07:00
2021-06-18 11:43:09 +02:00
2021-07-08 11:48:20 -07:00
2022-01-20 08:52:54 +02:00
2018-10-15 16:31:29 -04:00