Date: Mon, 15 Aug 2011 13:33:14 +0000 (UTC) From: Nathan Whitehorn <nwhitehorn@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r224882 - head/sys/conf Message-ID: <201108151333.p7FDXEUP012051@svn.freebsd.org>
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Author: nwhitehorn Date: Mon Aug 15 13:33:14 2011 New Revision: 224882 URL: http://svn.freebsd.org/changeset/base/224882 Log: Use a maximum of -O on PowerPC kernels instead of -O2 to prevent a rare bug that could cause intermittent memory corruption on PowerPC SMP systems using non-debug kernels. This is a temporary change until the real problem is fixed. Approved by: re (kib) Modified: head/sys/conf/kern.pre.mk Modified: head/sys/conf/kern.pre.mk ============================================================================== --- head/sys/conf/kern.pre.mk Mon Aug 15 13:27:02 2011 (r224881) +++ head/sys/conf/kern.pre.mk Mon Aug 15 13:33:14 2011 (r224882) @@ -27,8 +27,12 @@ SIZE?= size _MINUS_O= -O CTFFLAGS+= -g .else +.if ${MACHINE_CPUARCH} == "powerpc" +_MINUS_O= -O # gcc miscompiles some code at -O2 +.else _MINUS_O= -O2 .endif +.endif .if ${MACHINE_CPUARCH} == "amd64" COPTFLAGS?=-O2 -frename-registers -pipe .else
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