Date: Sun, 6 Mar 2005 20:09:00 +0000 (UTC) From: Alan Cox <alc@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/kern uipc_mbuf.c src/sys/sys mbuf.h Message-ID: <200503062009.j26K90cs009199@repoman.freebsd.org>
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alc 2005-03-06 20:09:00 UTC
FreeBSD src repository
Modified files:
sys/kern uipc_mbuf.c
sys/sys mbuf.h
Log:
The m_ext reference counts are potentially shared and modified
asynchronously by different threads. Thus, declare as volatile the
reference count that is accessed through m_ext's pointer, ref_cnt.
Revert the previous change, revision 1.144, that casts as volatile a
single dereference of ref_cnt.
Reviewed by: bmilekic, dwhite
Problem reported by: kris
MFC after: 3 days
Revision Changes Path
1.145 +4 -6 src/sys/kern/uipc_mbuf.c
1.168 +1 -1 src/sys/sys/mbuf.h
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