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Date: Thu, 09 Nov 2017 09:29:14 +0530 From: Chandan Rajendra <chandan@...ux.vnet.ibm.com> To: Miklos Szeredi <miklos@...redi.hu> Cc: Stephen Rothwell <sfr@...b.auug.org.au>, Linux-Next Mailing List <linux-next@...r.kernel.org>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org> Subject: Re: linux-next: build warning after merge of the overlayfs tree On Thursday, November 9, 2017 4:03:06 AM IST Stephen Rothwell wrote: > Hi Miklos, > > After merging the overlayfs tree, today's linux-next build (powerpc > ppc64_defconfig) produced this warning: > > fs/overlayfs/super.c: In function 'ovl_fill_super': > fs/overlayfs/super.c:1070:25: warning: 'numlower' may be used uninitialized in this function [-Wmaybe-uninitialized] > unsigned int stacklen, numlower, i; > ^ > fs/overlayfs/super.c:1069:15: warning: 'stack' may be used uninitialized in this function [-Wmaybe-uninitialized] > struct path *stack; > ^ > > The following trivial patch resolves the warnings, diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c index fd11c05..602e686 100644 --- a/fs/overlayfs/super.c +++ b/fs/overlayfs/super.c @@ -1066,8 +1066,8 @@ static struct ovl_entry *ovl_get_lowerstack(struct super_block *sb, { int err; char *lowertmp, *lower; - struct path *stack; - unsigned int stacklen, numlower, i; + struct path *stack = NULL; + unsigned int stacklen, numlower = 0, i; bool remote = false; struct ovl_entry *oe; -- chandan
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