linux-kernel - [PATCH 2/6] avr32: Remove useless zeroing of swapper_pg

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Date:	Fri, 27 Jun 2008 17:57:52 +0200
From:	Haavard Skinnemoen <haavard.skinnemoen@...el.com>
To:	kernel@...32linux.org
Cc:	linux-kernel@...r.kernel.org,
	Haavard Skinnemoen <haavard.skinnemoen@...el.com>
Subject: [PATCH 2/6] avr32: Remove useless zeroing of swapper_pg_dir at startup

swapper_pg_dir is stored in .bss, so it must already be zeroed out
when we get there.

Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@...el.com>
---
 arch/avr32/mm/init.c |   16 +++-------------
 1 files changed, 3 insertions(+), 13 deletions(-)

diff --git a/arch/avr32/mm/init.c b/arch/avr32/mm/init.c
index 5ee1e40..0e77578 100644
--- a/arch/avr32/mm/init.c
+++ b/arch/avr32/mm/init.c
@@ -108,19 +108,9 @@ void __init paging_init(void)
 	zero_page = alloc_bootmem_low_pages_node(NODE_DATA(0),
 						 PAGE_SIZE);
 
-	{
-		pgd_t *pg_dir;
-		int i;
-
-		pg_dir = swapper_pg_dir;
-		sysreg_write(PTBR, (unsigned long)pg_dir);
-
-		for (i = 0; i < PTRS_PER_PGD; i++)
-			pgd_val(pg_dir[i]) = 0;
-
-		enable_mmu();
-		printk ("CPU: Paging enabled\n");
-	}
+	sysreg_write(PTBR, (unsigned long)swapper_pg_dir);
+	enable_mmu();
+	printk ("CPU: Paging enabled\n");
 
 	for_each_online_node(nid) {
 		pg_data_t *pgdat = NODE_DATA(nid);
-- 
1.5.5.4

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