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authorJulia Lawall <julia@diku.dk>2008-10-15 16:51:04 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2008-10-16 15:06:54 -0700
commit70a3075d40154053ad90d342b3dcb1b795c73dbb (patch)
tree8740f15b26908f8ab247b3fc4c96cfaaf88140c9
parentcb76d5a4c4a74f4ff0bd4db5069f02fe4679a5ed (diff)
FRV: 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. arch/frv/mm/init.c | 2 -- 1 file changed, 2 deletions(-) This was fixed using the following semantic patch. (http://www.emn.fr/x-info/coccinelle/) // <smpl> @@ expression E; statement S; @@ E = \(alloc_bootmem\|alloc_bootmem_low\|alloc_bootmem_pages\|alloc_bootmem_low_pages\)(...) ... when != E ( - BUG_ON (E == NULL); | - if (E == NULL) S ) @@ expression E,E1; @@ E = \(alloc_bootmem\|alloc_bootmem_low\|alloc_bootmem_pages\|alloc_bootmem_low_pages\)(...) ... when != E - memset(E,0,E1); // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--arch/frv/mm/init.c2
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/frv/mm/init.c b/arch/frv/mm/init.c
index 1b851db..0708284 100644
--- a/arch/frv/mm/init.c
+++ b/arch/frv/mm/init.c
@@ -87,8 +87,6 @@ void __init paging_init(void)
pkmap_page_table = alloc_bootmem_pages(PAGE_SIZE);
- memset(pkmap_page_table, 0, PAGE_SIZE);
-
pge = swapper_pg_dir + pgd_index_k(PKMAP_BASE);
pue = pud_offset(pge, PKMAP_BASE);
pme = pmd_offset(pue, PKMAP_BASE);