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swsusp: don't pass a stack address to blkdev_get_by_path

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holder is just an on-stack pointer that can easily be reused by other calls,
replace it with a static variable that doesn't change.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Acked-by: Rafael J. Wysocki <rafael@kernel.org>
Link: https://lore.kernel.org/r/20230608110258.189493-12-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2023-06-08 13:02:39 +02:00 committed by Jens Axboe
parent 7ee34cbc29
commit c889d0793d
1 changed files with 3 additions and 2 deletions
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5
kernel/power/swap.c
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@ -1510,6 +1510,8 @@ int swsusp_read(unsigned int *flags_p)
return error;
}
static void *swsusp_holder;
/**
* swsusp_check - Check for swsusp signature in the resume device
*/
@ -1517,14 +1519,13 @@ int swsusp_read(unsigned int *flags_p)
int swsusp_check(bool snapshot_test)
{
int error;
void *holder;
fmode_t mode = FMODE_READ;
if (snapshot_test)
mode |= FMODE_EXCL;
hib_resume_bdev = blkdev_get_by_dev(swsusp_resume_device,
mode, &holder, NULL);
mode, &swsusp_holder, NULL);
if (!IS_ERR(hib_resume_bdev)) {
set_blocksize(hib_resume_bdev, PAGE_SIZE);
clear_page(swsusp_header);