Date: Mon, 12 Oct 2009 15:56:27 +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: <200910121557.n9CFv6RA040654@repoman.freebsd.org>
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attilio 2009-10-12 15:56:27 UTC
FreeBSD src repository
Modified files: (Branch: RELENG_7)
sys/kern kern_rwlock.c kern_sx.c
sys/sys rwlock.h sx.h
Log:
SVN rev 197984 on 2009-10-12 15:56:27Z by attilio
MFC r1979643:
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.
Revision Changes Path
1.28.4.7 +4 -4 src/sys/kern/kern_rwlock.c
1.55.2.3 +4 -4 src/sys/kern/kern_sx.c
1.14.4.2 +0 -7 src/sys/sys/rwlock.h
1.37.2.2 +1 -8 src/sys/sys/sx.h
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