db71922217
This patch is a preparation necessary to remove the BKL from do_new_mount().
It explicitly adds calls to lock_kernel()/unlock_kernel() around
get_sb/fill_super operations for filesystems that still uses the BKL.
I've read through all the code formerly covered by the BKL inside
do_kern_mount() and have satisfied myself that it doesn't need the BKL
any more.
do_kern_mount() is already called without the BKL when mounting the rootfs
and in nfsctl. do_kern_mount() calls vfs_kern_mount(), which is called
from various places without BKL: simple_pin_fs(), nfs_do_clone_mount()
through nfs_follow_mountpoint(), afs_mntpt_do_automount() through
afs_mntpt_follow_link(). Both later functions are actually the filesystems
follow_link inode operation. vfs_kern_mount() is calling the specified
get_sb function and lets the filesystem do its job by calling the given
fill_super function.
Therefore I think it is safe to push down the BKL from the VFS to the
low-level filesystems get_sb/fill_super operation.
[arnd: do not add the BKL to those file systems that already
don't use it elsewhere]
Signed-off-by: Jan Blunck <jblunck@infradead.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Matthew Wilcox <matthew@wil.cx>
Cc: Christoph Hellwig <hch@infradead.org>
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| .. | ||
| aops.c | ||
| aops.h | ||
| attrib.c | ||
| attrib.h | ||
| bitmap.c | ||
| bitmap.h | ||
| collate.c | ||
| collate.h | ||
| compress.c | ||
| debug.c | ||
| debug.h | ||
| dir.c | ||
| dir.h | ||
| endian.h | ||
| file.c | ||
| index.c | ||
| index.h | ||
| inode.c | ||
| inode.h | ||
| Kconfig | ||
| layout.h | ||
| lcnalloc.c | ||
| lcnalloc.h | ||
| logfile.c | ||
| logfile.h | ||
| Makefile | ||
| malloc.h | ||
| mft.c | ||
| mft.h | ||
| mst.c | ||
| namei.c | ||
| ntfs.h | ||
| quota.c | ||
| quota.h | ||
| runlist.c | ||
| runlist.h | ||
| super.c | ||
| sysctl.c | ||
| sysctl.h | ||
| time.h | ||
| types.h | ||
| unistr.c | ||
| upcase.c | ||
| usnjrnl.c | ||
| usnjrnl.h | ||
| volume.h | ||