On 2009-11-18 10:24:36, Jan Blunck wrote: > 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. > > Signed-off-by: Jan Blunck <jblunck@xxxxxxx> > Cc: Matthew Wilcox <matthew@xxxxxx> > Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx> > Cc: Arnd Bergmann <arnd@xxxxxxxx> Wrt fs/qnx4: Acked-by: Anders Larsen <al@xxxxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
