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New code for 5.7:

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- Fix a regression where we broke the userspace hibernation driver by
    disallowing writes to the swap device.
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Merge tag 'vfs-5.7-merge-1' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux

Pull hibernation fix from Darrick Wong:
 "Fix a regression where we broke the userspace hibernation driver by
  disallowing writes to the swap device"

* tag 'vfs-5.7-merge-1' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  hibernate: Allow uswsusp to write to swap
This commit is contained in:
Linus Torvalds 2020-04-02 12:59:36 -07:00
commit 7db83c070b
1 changed files with 3 additions and 1 deletions
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4
fs/block_dev.c
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@ -34,6 +34,7 @@
#include <linux/task_io_accounting_ops.h>
#include <linux/falloc.h>
#include <linux/uaccess.h>
#include <linux/suspend.h>
#include "internal.h"
struct bdev_inode {
@ -2013,7 +2014,8 @@ 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))
/* uswsusp needs write permission to the swap */
if (IS_SWAPFILE(bd_inode) && !hibernation_available())
return -ETXTBSY;
if (!iov_iter_count(from))