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authorJulia Lawall <julia@diku.dk>2008-07-14 09:59:13 +0200
committerHeiko Carstens <heiko.carstens@de.ibm.com>2008-07-14 10:02:15 +0200
commit3ca1c9907a352140bc83366511182b6ac776d8ee (patch)
treee4b502097f7eae5db457635bf807979515cc55ab /drivers/s390/char/raw3270.c
parent402a3998ba6ba81bae6ac586ada55a0dd6a7c287 (diff)
[S390] drivers/s390: 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. drivers/s390/char/raw3270.c | 11 +---------- drivers/s390/char/sclp_con.c | 2 -- 2 files changed, 1 insertion(+), 12 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: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/char/raw3270.c')
-rw-r--r--drivers/s390/char/raw3270.c11
1 files changed, 1 insertions, 10 deletions
diff --git a/drivers/s390/char/raw3270.c b/drivers/s390/char/raw3270.c
index efce32e97be..e2767e3b8cf 100644
--- a/drivers/s390/char/raw3270.c
+++ b/drivers/s390/char/raw3270.c
@@ -153,19 +153,10 @@ struct raw3270_request __init *raw3270_request_alloc_bootmem(size_t size)
struct raw3270_request *rq;
rq = alloc_bootmem_low(sizeof(struct raw3270));
- if (!rq)
- return ERR_PTR(-ENOMEM);
- memset(rq, 0, sizeof(struct raw3270_request));
/* alloc output buffer. */
- if (size > 0) {
+ if (size > 0)
rq->buffer = alloc_bootmem_low(size);
- if (!rq->buffer) {
- free_bootmem((unsigned long) rq,
- sizeof(struct raw3270));
- return ERR_PTR(-ENOMEM);
- }
- }
rq->size = size;
INIT_LIST_HEAD(&rq->list);