Date: Fri, 9 Dec 2016 19:07:31 +0000 (UTC) From: Gleb Smirnoff <glebius@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r309751 - head/sys/kern Message-ID: <201612091907.uB9J7VHu015907@repo.freebsd.org>
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Author: glebius Date: Fri Dec 9 19:07:31 2016 New Revision: 309751 URL: https://svnweb.freebsd.org/changeset/base/309751 Log: Use acquire write to cr_lock to complement with release write at end of locked region. Submitted by: kib Modified: head/sys/kern/subr_counter.c Modified: head/sys/kern/subr_counter.c ============================================================================== --- head/sys/kern/subr_counter.c Fri Dec 9 18:55:27 2016 (r309750) +++ head/sys/kern/subr_counter.c Fri Dec 9 19:07:31 2016 (r309751) @@ -144,7 +144,7 @@ counter_ratecheck(struct counter_rate *c * First try unlocked read, and then proceed with atomic. */ if ((cr->cr_lock == 0) && - atomic_cmpset_int(&cr->cr_lock, 0, 1)) { + atomic_cmpset_acq_int(&cr->cr_lock, 0, 1)) { /* * Check if other thread has just went through the * reset sequence before us.
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