Date: Mon, 12 Oct 2009 15:32:00 +0000 (UTC) From: Attilio Rao <attilio@FreeBSD.org> To: cvs-src-old@freebsd.org Subject: cvs commit: src/sys/kern kern_lock.c kern_rwlock.c kern_sx.c src/sys/sys rwlock.h sx.h Message-ID: <200910121532.n9CFWqvf038503@repoman.freebsd.org>
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attilio 2009-10-12 15:32:00 UTC
FreeBSD src repository
Modified files: (Branch: RELENG_8)
sys/kern kern_lock.c kern_rwlock.c kern_sx.c
sys/sys rwlock.h sx.h
Log:
SVN rev 197981 on 2009-10-12 15:32:00Z by attilio
MFC r197643, r197735:
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.
Approved by: re (kib)
Revision Changes Path
1.144.2.5 +3 -3 src/sys/kern/kern_lock.c
1.48.2.5 +4 -3 src/sys/kern/kern_rwlock.c
1.67.2.6 +4 -4 src/sys/kern/kern_sx.c
1.21.2.2 +0 -7 src/sys/sys/rwlock.h
1.42.2.2 +1 -8 src/sys/sys/sx.h
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