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| author | WEI-HONG, YE <1234567weewee457@gmail.com> | 2026-05-25 13:04:50 +0000 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2026-06-03 11:38:46 +0200 |
| commit | cb19b8a9add2ed3774c1276e0a3906e52e8cf39a (patch) | |
| tree | 55f4743f6f39a919b57845d86c094a893711bb72 | |
| parent | b64b19fa1a90baed3c20f9a02f44ecd2b928010f (diff) | |
| download | linux-cb19b8a9add2ed3774c1276e0a3906e52e8cf39a.tar.gz linux-cb19b8a9add2ed3774c1276e0a3906e52e8cf39a.zip | |
locking/qspinlock: Clarify pending field layout
For CONFIG_NR_CPUS < 16K, _Q_PENDING_BITS is 8 and the pending
field occupies bits 8-15 of the lock word. The current comment
documents bit 8 as pending and bits 9-15 as unused, which describes
the pending flag value rather than the field layout.
Describe bits 8-15 as the pending byte so the layout description
is consistent with the lock byte.
Signed-off-by: WEI-HONG, YE <1234567weewee457@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Waiman Long <longman@redhat.com>
Link: https://patch.msgid.link/20260525130450.723937-1-1234567weewee457@gmail.com
| -rw-r--r-- | include/asm-generic/qspinlock_types.h | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/include/asm-generic/qspinlock_types.h b/include/asm-generic/qspinlock_types.h index 2fd1fb89ec36..7d17b9bb069c 100644 --- a/include/asm-generic/qspinlock_types.h +++ b/include/asm-generic/qspinlock_types.h @@ -53,8 +53,7 @@ typedef struct qspinlock { * * When NR_CPUS < 16K * 0- 7: locked byte - * 8: pending - * 9-15: not used + * 8-15: pending byte * 16-17: tail index * 18-31: tail cpu (+1) * |