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| author | Julia Lawall <julia@diku.dk> | 2008-12-25 13:39:30 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2008-12-25 13:39:17 +0100 |
| commit | acfa922c5a00eca0abac0e2b6d6666c606c27345 (patch) | |
| tree | 1fab727cb7ecebf8eb1868c096ba4d646654720c /arch | |
| parent | 0946100f566d04cc93e86654f3ba588ee94b3f4c (diff) | |
| download | linux-acfa922c5a00eca0abac0e2b6d6666c606c27345.tar.bz2 | |
[S390] s390: Remove redundant test
The loop above the modified code only terminates when rc is a valid pointer.
A simplified version of the semantic patch that makes this change is as
follows: (http://www.emn.fr/x-info/coccinelle/)
// <smpl>
@r exists@
local idexpression x;
expression E;
position p1,p2;
@@
if (x@p1 == NULL || ...) { ... when forall
return ...; }
... when != \(x=E\|x--\|x++\|--x\|++x\|x-=E\|x+=E\|x|=E\|x&=E\|&x\)
(
x@p2 == NULL
|
x@p2 != NULL
)
// another path to the test that is not through p1?
@s exists@
local idexpression r.x;
position r.p1,r.p2;
@@
... when != x@p1
(
x@p2 == NULL
|
x@p2 != NULL
)
@fix depends on !s@
position r.p1,r.p2;
expression x,E;
statement S1,S2;
@@
(
- if ((x@p2 != NULL) || ...)
S1
|
- if ((x@p2 == NULL) && ...) S1
|
- BUG_ON(x@p2 == NULL);
)
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/s390/kernel/debug.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/s390/kernel/debug.c b/arch/s390/kernel/debug.c index d80fcd4a7fe1..21c90374a58c 100644 --- a/arch/s390/kernel/debug.c +++ b/arch/s390/kernel/debug.c @@ -388,7 +388,7 @@ debug_info_copy(debug_info_t* in, int mode) debug_info_free(rc); } while (1); - if(!rc || (mode == NO_AREAS)) + if (mode == NO_AREAS) goto out; for(i = 0; i < in->nr_areas; i++){ |