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Date:	Sat, 19 Jul 2014 17:05:13 +0530
From:	Himangi Saraogi <>
To:	Geert Uytterhoeven <>,,
Cc:	Julia Lawall <>
Subject: [PATCH] mm/m68k: Eliminate memset after alloc_bootmem_pages

alloc_bootmem and related functions always return a zeroed region of memory.
Thus a memset after calls to these functions is unnecessary.

The following Coccinelle semantic patch was used for making the change:

expression E,E1;

E = \(alloc_bootmem\|alloc_bootmem_low\|alloc_bootmem_pages\|alloc_bootmem_low_pages\)(...)
... when != E
- memset(E,0,E1);

Signed-off-by: Himangi Saraogi <>
Acked-by: Julia Lawall <>
To send to: Geert Uytterhoeven <>,,
 arch/m68k/mm/init.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/arch/m68k/mm/init.c b/arch/m68k/mm/init.c
index acaff6a..b09a3cb 100644
--- a/arch/m68k/mm/init.c
+++ b/arch/m68k/mm/init.c
@@ -94,7 +94,6 @@ void __init paging_init(void)
 	high_memory = (void *) end_mem;
 	empty_zero_page = alloc_bootmem_pages(PAGE_SIZE);
-	memset(empty_zero_page, 0, PAGE_SIZE);
 	 * Set up SFC/DFC registers (user data space).

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