Author: mjg
Date: Sun Mar 8 00:22:32 2020
New Revision: 358733
URL: https://svnweb.freebsd.org/changeset/base/358733
Log:
seqc: tidy up
- avoid hand-rolled read
- match begin/end in terms of fence style
Modified:
head/sys/sys/seqc.h
Modified: head/sys/sys/seqc.h
==============================================================================
--- head/sys/sys/seqc.h Sat Mar 7 15:37:23 2020 (r358732)
+++ head/sys/sys/seqc.h Sun Mar 8 00:22:32 2020 (r358733)
@@ -66,7 +66,8 @@ static __inline void
seqc_write_end(seqc_t *seqcp)
{
- atomic_store_rel_int(seqcp, *seqcp + 1);
+ atomic_thread_fence_rel();
+ *seqcp += 1;
MPASS(!seqc_in_modify(*seqcp));
critical_exit();
}
@@ -84,7 +85,7 @@ seqc_read(const seqc_t *seqcp)
seqc_t ret;
for (;;) {
- ret = atomic_load_acq_int(__DECONST(seqc_t *, seqcp));
+ ret = seqc_read_any(seqcp);
if (__predict_false(seqc_in_modify(ret))) {
cpu_spinwait();
continue;
_______________________________________________
svn-src-head@freebsd.org mailing list
https://lists.freebsd.org/mailman/listinfo/svn-src-head
To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
