[git pull] vfs.git set_blocksize() (bdev pile 1)

[Al Viro <viro@zeniv.linux.org.uk>]

First bdev-related pile - set_blocksize() stuff

The following changes since commit 0bbac3facb5d6cc0171c45c9873a2dc96bea9680:

  Linux 6.9-rc4 (2024-04-14 13:38:39 -0700)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git tags/pull-set_blocksize

for you to fetch changes up to d18a8679581e8d1166b68e211d16c5349ae8c38c:

  make set_blocksize() fail unless block device is opened exclusive (2024-05-02 17:39:44 -0400)

----------------------------------------------------------------
getting rid of bogus set_blocksize() uses, switching it
to struct file * and verifying that caller has device
opened exclusively.

----------------------------------------------------------------
Al Viro (9):
      bcache_register(): don't bother with set_blocksize()
      pktcdvd: sort set_blocksize() calls out
      swapon(2)/swapoff(2): don't bother with block size
      swapon(2): open swap with O_EXCL
      zram: don't bother with reopening - just use O_EXCL for open
      swsusp: don't bother with setting block size
      btrfs_get_bdev_and_sb(): call set_blocksize() only for exclusive opens
      set_blocksize(): switch to passing struct file *
      make set_blocksize() fail unless block device is opened exclusive

 Documentation/filesystems/porting.rst |  7 +++++++
 block/bdev.c                          | 14 ++++++++++----
 block/ioctl.c                         | 21 ++++++++++++---------
 drivers/block/pktcdvd.c               |  7 +------
 drivers/block/zram/zram_drv.c         | 29 +++++++----------------------
 drivers/block/zram/zram_drv.h         |  2 +-
 drivers/md/bcache/super.c             |  4 ----
 fs/btrfs/dev-replace.c                |  2 +-
 fs/btrfs/volumes.c                    | 13 ++++++++-----
 fs/ext4/super.c                       |  2 +-
 fs/reiserfs/journal.c                 |  5 ++---
 fs/xfs/xfs_buf.c                      |  2 +-
 include/linux/blkdev.h                |  2 +-
 include/linux/swap.h                  |  2 --
 kernel/power/swap.c                   |  7 +------
 mm/swapfile.c                         | 29 ++---------------------------
 16 files changed, 55 insertions(+), 93 deletions(-)