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| author |   Julia Lawall <julia@diku.dk> | 2009-07-12 10:03:42 +0000 |
|---|---|---|
| committer |   Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2009-08-20 10:29:23 +1000 |
| commit | 5b36f1deefa63ef71cd3c3933781318ac61c5469 (patch) | |
| tree | 307ba565e44fc382335b3c3dfa9e443c49ff6f60 /drivers | |
| parent | powerpc/nvram: Allow byte length reads from mmio NVRAM driver (diff) | |
| download | linux-dev-5b36f1deefa63ef71cd3c3933781318ac61c5469.tar.xz linux-dev-5b36f1deefa63ef71cd3c3933781318ac61c5469.zip | |
hvc_console: Drop unnecessary NULL test
The result of container_of should not be NULL. In particular, in this case
the argument to the enclosing function has passed though INIT_WORK, which
dereferences it, implying that its container cannot be NULL.
A simplified version of the semantic patch that makes this change is as
follows:
(http://www.emn.fr/x-info/coccinelle/)
// <smpl>
@@
identifier fn,work,x,fld;
type T;
expression E1,E2;
statement S;
@@
static fn(struct work_struct *work) {
... when != work = E1
x = container_of(work,T,fld)
... when != x = E2
- if (x == NULL) S
...
}
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/char/hvc_console.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/drivers/char/hvc_console.c b/drivers/char/hvc_console.c index d97779ef72cb..25ce15bb1c08 100644 --- a/drivers/char/hvc_console.c +++ b/drivers/char/hvc_console.c @@ -516,8 +516,6 @@ static void hvc_set_winsz(struct work_struct *work) struct winsize ws; hp = container_of(work, struct hvc_struct, tty_resize); - if (!hp) - return; spin_lock_irqsave(&hp->lock, hvc_flags); if (!hp->tty) { |