Author: mjg
Date: Fri Dec 27 13:37:19 2019
New Revision: 356122
URL: https://svnweb.freebsd.org/changeset/base/356122
Log:
Plug a warning in read-mostly spinlocks reported by gcc.
Modified:
head/sys/kern/kern_rmlock.c
Modified: head/sys/kern/kern_rmlock.c
==============================================================================
--- head/sys/kern/kern_rmlock.c Fri Dec 27 11:26:12 2019 (r356121)
+++ head/sys/kern/kern_rmlock.c Fri Dec 27 13:37:19 2019 (r356122)
@@ -1064,7 +1064,8 @@ rms_wlock(struct rmslock *rms)
mtx_lock(&rms->mtx);
rms->writers++;
if (rms->writers > 1) {
- msleep(&rms->writers, &rms->mtx, PUSER - 1 | PDROP,
mtx_name(&rms->mtx), 0);
+ msleep(&rms->writers, &rms->mtx, (PUSER - 1) | PDROP,
+ mtx_name(&rms->mtx), 0);
MPASS(rms->readers == 0);
return;
}
@@ -1072,7 +1073,8 @@ rms_wlock(struct rmslock *rms)
rms_wlock_switch(rms);
if (rms->readers > 0)
- msleep(&rms->writers, &rms->mtx, PUSER - 1 | PDROP,
mtx_name(&rms->mtx), 0);
+ msleep(&rms->writers, &rms->mtx, (PUSER - 1) | PDROP,
+ mtx_name(&rms->mtx), 0);
else
mtx_unlock(&rms->mtx);
MPASS(rms->readers == 0);
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