2014-07-19 11:37:50

by Himangi Saraogi

[permalink] [raw]
Subject: [PATCH] parisc: Eliminate memset after alloc_bootmem_pages

alloc_bootmem and related function always return 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 <[email protected]>
Acked-by: Julia Lawall <[email protected]>
---
arch/parisc/mm/init.c | 1 -
1 file changed, 1 deletion(-)

diff --git a/arch/parisc/mm/init.c b/arch/parisc/mm/init.c
index ae085ad..0bef864 100644
--- a/arch/parisc/mm/init.c
+++ b/arch/parisc/mm/init.c
@@ -728,7 +728,6 @@ static void __init pagetable_init(void)
#endif

empty_zero_page = alloc_bootmem_pages(PAGE_SIZE);
- memset(empty_zero_page, 0, PAGE_SIZE);
}

static void __init gateway_init(void)
--
1.9.1