virtiofs: simplify sb setup

Currently when acquiring an sb for virtiofs fuse_mount_get() is being
called from virtio_fs_set_super() if a new sb is being filled and
fuse_mount_put() is called unconditionally after sget_fc() returns.

The exact same result can be obtained by checking whether
fs_contex->s_fs_info was set to NULL (ref trasferred to sb->s_fs_info) and
only calling fuse_mount_put() if the ref wasn't transferred (error or
matching sb found).

This allows getting rid of virtio_fs_set_super() and fuse_mount_get().

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>

1 files changed, 0 insertions, 7 deletions

diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index 1a47afc95f80..654708574d5e 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -742,13 +742,6 @@ void fuse_mount_put(struct fuse_mount *fm)
 }
 EXPORT_SYMBOL_GPL(fuse_mount_put);
 
-struct fuse_mount *fuse_mount_get(struct fuse_mount *fm)
-{
-	refcount_inc(&fm->count);
-	return fm;
-}
-EXPORT_SYMBOL_GPL(fuse_mount_get);
-
 static struct inode *fuse_get_root_inode(struct super_block *sb, unsigned mode)
 {
 	struct fuse_attr attr;