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Date: Mon, 9 Nov 2009 15:54:00 +0000 (GMT) From: Hugh Dickins <hugh.dickins@...cali.co.uk> To: askb <askb23@...il.com> cc: wharms@....de, Izik Eidus <ieidus@...hat.com>, linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org Subject: Re: [PATCH] mm/ksm.c - Fix compile warnings (PS ignore my formatting in previous email) On Mon, 9 Nov 2009, askb wrote: > On Mon, 2009-11-09 at 10:51 +0000, Hugh Dickins wrote: > > On Wed, 4 Nov 2009, askb wrote: > > > On Wed, 2009-11-04 at 10:57 +0100, walter harms wrote: > > > > askb schrieb: > > > > > Found the compiler warning on linux-next: > > > > > > > > > > mm/ksm.c: In function ‘ksm_scan_thread’: > > > > > mm/ksm.c:1083: warning: ‘page2[0u]’ may be used uninitialized in this > > > > > function > > > > > mm/ksm.c:1083: note: ‘page2[0u]’ was declared here ... > > Which version of the compiler gave you that uninitialized warning? > > gcc version 4.3.2 [gcc-4_3-branch revision 141291] (SUSE Linux) Thanks: funny, that's the one I've been using most too. > > > A version which lots of people are using, or just some snapshot? > > I've never seen a warning there myself, but they do keep "refining" > > that logic. > > > I got the warning while doing "make randconfig". However, now after a > cleanup and redoing the same, the warning is not seen. I just tried the most obvious alternatives (CC_OPTIMIZE_FOR_SIZE, OPTIMIZE_INLINING, off and on), but still didn't see the warning. Never mind, I've shoved a NULL in my tree, but no rush for this. Hugh
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