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bdi: test bdi_init failure

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There were two places where return value from bdi_init was not tested.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Mikulas Patocka 2013-10-14 12:14:13 -04:00 committed by Jens Axboe
parent a207f59376
commit 8077c0d983
3 changed files with 6 additions and 4 deletions
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3
fs/char_dev.c
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@ -574,7 +574,8 @@ static struct kobject *base_probe(dev_t dev, int *part, void *data)
void __init chrdev_init(void)
{
cdev_map = kobj_map_init(base_probe, &chrdevs_lock);
bdi_init(&directly_mappable_cdev_bdi);
if (bdi_init(&directly_mappable_cdev_bdi))
panic("Failed to init directly mappable cdev bdi");
}

4
include/linux/backing-dev.h
View file

@ -109,7 +109,7 @@ struct backing_dev_info {
#endif
};
int bdi_init(struct backing_dev_info *bdi);
int __must_check bdi_init(struct backing_dev_info *bdi);
void bdi_destroy(struct backing_dev_info *bdi);
__printf(3, 4)
@ -117,7 +117,7 @@ int bdi_register(struct backing_dev_info *bdi, struct device *parent,
const char *fmt, ...);
int bdi_register_dev(struct backing_dev_info *bdi, dev_t dev);
void bdi_unregister(struct backing_dev_info *bdi);
int bdi_setup_and_register(struct backing_dev_info *, char *, unsigned int);
int __must_check bdi_setup_and_register(struct backing_dev_info *, char *, unsigned int);
void bdi_start_writeback(struct backing_dev_info *bdi, long nr_pages,
enum wb_reason reason);
void bdi_start_background_writeback(struct backing_dev_info *bdi);

3
mm/swap.c
View file

@ -934,7 +934,8 @@ void __init swap_setup(void)
#ifdef CONFIG_SWAP
int i;
bdi_init(swapper_spaces[0].backing_dev_info);
if (bdi_init(swapper_spaces[0].backing_dev_info))
panic("Failed to init swap bdi");
for (i = 0; i < MAX_SWAPFILES; i++) {
spin_lock_init(&swapper_spaces[i].tree_lock);
INIT_LIST_HEAD(&swapper_spaces[i].i_mmap_nonlinear);