diff options
| author | Uros Bizjak <[email protected]> | 2023-02-27 22:42:28 +0100 |
|---|---|---|
| committer | Andrew Morton <[email protected]> | 2023-03-28 16:20:09 -0700 |
| commit | bdeb91881088810ab1d8ae620862c3b4d78f4041 (patch) | |
| tree | b5790da422d9eb9b58e4d08905ffb3ef84b60377 /tools/perf/scripts/python/exported-sql-viewer.py | |
| parent | f2421a16f42a2f121c587c89b60cc8f3f2df36c2 (diff) | |
mm/rmap: use atomic_try_cmpxchg in set_tlb_ubc_flush_pending
Use atomic_try_cmpxchg instead of atomic_cmpxchg (*ptr, old, new) == old
in set_tlb_ubc_flush_pending. 86 CMPXCHG instruction returns success in
ZF flag, so this change saves a compare after cmpxchg (and related move
instruction in front of cmpxchg).
Also, try_cmpxchg implicitly assigns old *ptr value to "old" when cmpxchg
fails.
No functional change intended.
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Uros Bizjak <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/exported-sql-viewer.py')
0 files changed, 0 insertions, 0 deletions