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Open Source and information security mailing list archives
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Date: Thu, 03 May 2012 11:28:44 -0700 From: "H. Peter Anvin" <hpa@...or.com> To: Linus Torvalds <torvalds@...ux-foundation.org> CC: Al Viro <viro@...iv.linux.org.uk>, Nick Piggin <npiggin@...il.com>, Jana Saout <jana@...ut.de>, Joel Becker <jlbec@...lplan.org>, linux-kernel@...r.kernel.org Subject: Re: Oops with DCACHE_WORD_ACCESS and ocfs2, autofs4 + "lea" __WORDSUFFIX " %2,%1\n\t" + "and" __WORDSUFFIX " %4,%1\n\t" + "shl" __WORDSUFFIX " $3,%1\n\t" + "shr" __WORDSUFFIX " %b1,%0\n\t" Also, for this sequence of instructions using %ecx unconditionally is actually better (avoids REX prefixes on 64 bits.) -hpa -- H. Peter Anvin, Intel Open Source Technology Center I work for Intel. I don't speak on their behalf. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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