Date: Wed, 30 Sep 2009 13:26:31 +0000 (UTC) From: Attilio Rao <attilio@FreeBSD.org> To: cvs-src-old@freebsd.org Subject: cvs commit: src/sys/kern kern_rwlock.c kern_sx.c src/sys/sys rwlock.h sx.h Message-ID: <200909301327.n8UDRGMp024849@repoman.freebsd.org>
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attilio 2009-09-30 13:26:31 UTC
FreeBSD src repository
Modified files:
sys/kern kern_rwlock.c kern_sx.c
sys/sys rwlock.h sx.h
Log:
SVN rev 197643 on 2009-09-30 13:26:31Z by attilio
When releasing a read/shared lock we need to use a write memory barrier
in order to avoid, on architectures which doesn't have strong ordered
writes, CPU instructions reordering.
Diagnosed by: fabio
Reviewed by: jhb
Tested by: Giovanni Trematerra
<giovanni dot trematerra at gmail dot com>
Revision Changes Path
1.51 +4 -3 src/sys/kern/kern_rwlock.c
1.71 +4 -4 src/sys/kern/kern_sx.c
1.22 +0 -7 src/sys/sys/rwlock.h
1.43 +1 -8 src/sys/sys/sx.h
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