linux-kernel - [PATCH] Remove initialization of page_table in one_page_table

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Date:	Tue, 14 Jul 2009 16:57:46 +0800
From:	Zhaolei <zhaolei@...fujitsu.com>
To:	Ingo Molnar <mingo@...e.hu>
CC:	linux-kernel@...r.kernel.org
Subject: [PATCH] Remove initialization of page_table in one_page_table_init()

Only judge if (!page_table) when CONFIG_DEBUG_PAGEALLOC or CONFIG_KMEMCHECK
are defined, then we don't need to set init value for page_table.

Signed-off-by: Zhao Lei <zhaolei@...fujitsu.com>
---
 arch/x86/mm/init_32.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index 3cd7711..55da09b 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -108,13 +108,13 @@ static pmd_t * __init one_md_table_init(pgd_t *pgd)
 static pte_t * __init one_page_table_init(pmd_t *pmd)
 {
     if (!(pmd_val(*pmd) & _PAGE_PRESENT)) {
-        pte_t *page_table = NULL;
+        pte_t *page_table;
 
         if (after_bootmem) {
 #if defined(CONFIG_DEBUG_PAGEALLOC) || defined(CONFIG_KMEMCHECK)
             page_table = (pte_t *) alloc_bootmem_pages(PAGE_SIZE);
-#endif
             if (!page_table)
+#endif
                 page_table =
                 (pte_t *)alloc_bootmem_low_pages(PAGE_SIZE);
         } else
-- 
1.5.5.3


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