linux-kernel - [PATCH] mm/memory.c: remove warning from an uninitialized spinlock. was: Re: 2.6.21-rc7-mm2

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Date:	Thu, 26 Apr 2007 20:25:19 +0200
From:	Borislav Petkov <bbpetkov@...oo.de>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH] mm/memory.c: remove warning from an uninitialized spinlock. was: Re: 2.6.21-rc7-mm2

Remove build warning mm/memory.c:1491: warning: 'ptl' may be used uninitialized in this function.
The spinlock pointer is assigned to null since it gets overwritten right away in
pte_alloc_map_lock().

Signed-off-by: Borislav Petkov <bbpetkov@...oo.de>
---

Index: linux-mm/mm/memory.c
===================================================================
--- linux-mm.orig/mm/memory.c    2007-04-26 19:57:14.000000000 +0200
+++ linux-mm/mm/memory.c 2007-04-26 20:00:30.000000000 +0200
@@ -1488,7 +1488,7 @@
        pte_t *pte;
        int err;
        struct page *pmd_page;
-       spinlock_t *ptl;
+       spinlock_t *ptl = NULL;

        pte = (mm == &init_mm) ?
                pte_alloc_kernel(pmd, addr) :

-- 
Regards/Gruß,
    Boris.
-
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