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PM: rewrite is_hibernate_resume_dev to not require an inode

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Just check the dev_t to help simplifying the code.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2020-09-21 09:19:55 +02:00 committed by Jens Axboe
parent ef16e1d98c
commit bb3247a399
3 changed files with 9 additions and 9 deletions
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2
fs/block_dev.c
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@ -1885,7 +1885,7 @@ ssize_t blkdev_write_iter(struct kiocb *iocb, struct iov_iter *from)
if (bdev_read_only(I_BDEV(bd_inode)))
return -EPERM;
if (IS_SWAPFILE(bd_inode) && !is_hibernate_resume_dev(bd_inode))
if (IS_SWAPFILE(bd_inode) && !is_hibernate_resume_dev(bd_inode->i_rdev))
return -ETXTBSY;
if (!iov_iter_count(from))

4
include/linux/suspend.h
View File

@ -473,9 +473,9 @@ static inline int hibernate_quiet_exec(int (*func)(void *data), void *data) {
#endif /* CONFIG_HIBERNATION */
#ifdef CONFIG_HIBERNATION_SNAPSHOT_DEV
int is_hibernate_resume_dev(const struct inode *);
int is_hibernate_resume_dev(dev_t dev);
#else
static inline int is_hibernate_resume_dev(const struct inode *i) { return 0; }
static inline int is_hibernate_resume_dev(dev_t dev) { return 0; }
#endif
/* Hibernation and suspend events */

12
kernel/power/user.c
View File

@ -35,12 +35,12 @@ static struct snapshot_data {
bool ready;
bool platform_support;
bool free_bitmaps;
struct inode *bd_inode;
dev_t dev;
} snapshot_state;
int is_hibernate_resume_dev(const struct inode *bd_inode)
int is_hibernate_resume_dev(dev_t dev)
{
return hibernation_available() && snapshot_state.bd_inode == bd_inode;
return hibernation_available() && snapshot_state.dev == dev;
}
static int snapshot_open(struct inode *inode, struct file *filp)
@ -101,7 +101,7 @@ static int snapshot_open(struct inode *inode, struct file *filp)
data->frozen = false;
data->ready = false;
data->platform_support = false;
data->bd_inode = NULL;
data->dev = 0;
Unlock:
unlock_system_sleep();
@ -117,7 +117,7 @@ static int snapshot_release(struct inode *inode, struct file *filp)
swsusp_free();
data = filp->private_data;
data->bd_inode = NULL;
data->dev = 0;
free_all_swap_pages(data->swap);
if (data->frozen) {
pm_restore_gfp_mask();
@ -245,7 +245,7 @@ static int snapshot_set_swap_area(struct snapshot_data *data,
if (data->swap < 0)
return -ENODEV;
data->bd_inode = bdev->bd_inode;
data->dev = bdev->bd_dev;
bdput(bdev);
return 0;
}