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author | Julia Lawall <julia@diku.dk> | 2008-11-23 10:46:58 (GMT) |
---|---|---|
committer | Haavard Skinnemoen <haavard.skinnemoen@atmel.com> | 2009-01-06 11:39:25 (GMT) |
commit | e24500193bc39ef197d9f96af5850e7345fed84d (patch) | |
tree | 195ac419cc572f90a671bfe5894d4e5eb0947beb /arch/avr32 | |
parent | adde42b5834ed367ef7455d465bd9610190ad2a0 (diff) | |
download | linux-fsl-qoriq-e24500193bc39ef197d9f96af5850e7345fed84d.tar.xz |
arch/avr32: Eliminate NULL test and memset after alloc_bootmem
As noted by Akinobu Mita in patch b1fceac2b9e04d278316b2faddf276015fc06e3b,
alloc_bootmem and related functions never return NULL and always return a
zeroed region of memory. Thus a NULL test or memset after calls to these
functions is unnecessary.
This was fixed using the following semantic patch.
(http://www.emn.fr/x-info/coccinelle/)
// <smpl>
@@
expression E;
statement S;
@@
E = \(alloc_bootmem\|alloc_bootmem_low\|alloc_bootmem_pages\|alloc_bootmem_low_pages\|alloc_bootmem_node\|alloc_bootmem_low_pages_node\|alloc_bootmem_pages_node\)(...)
... when != E
(
- BUG_ON (E == NULL);
|
- if (E == NULL) S
)
@@
expression E,E1;
@@
E = \(alloc_bootmem\|alloc_bootmem_low\|alloc_bootmem_pages\|alloc_bootmem_low_pages\|alloc_bootmem_node\|alloc_bootmem_low_pages_node\|alloc_bootmem_pages_node\)(...)
... when != E
- memset(E,0,E1);
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Diffstat (limited to 'arch/avr32')
-rw-r--r-- | arch/avr32/mm/init.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/arch/avr32/mm/init.c b/arch/avr32/mm/init.c index fa92ff6..e819fa6 100644 --- a/arch/avr32/mm/init.c +++ b/arch/avr32/mm/init.c @@ -97,7 +97,6 @@ void __init paging_init(void) mem_map = NODE_DATA(0)->node_mem_map; - memset(zero_page, 0, PAGE_SIZE); empty_zero_page = virt_to_page(zero_page); flush_dcache_page(empty_zero_page); } |