gfs2: Don't reread inodes unnecessarily

JIRA: https://issues.redhat.com/browse/RHEL-88093
Upstream Status: https://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2.git

In gfs2_create_inode(), we initialize the inode from scratch and then we
write the result to disk.  Clear the GLF_INSTANTIATE_NEEDED glock flag
to indicate that the inode is up to date.  Otherwise, the next time the
inode glock is acquired, gfs2_instantiate() would reread the inode from
disk, which isn't necessary.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
(cherry picked from commit 0d735a3bac90ac940ed6fa43356e8f58ed44bc1e)

Author: Andreas Gruenbacher

fs/gfs2/inode.c

@@ -760,6 +760,7 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
 	error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, &gh);
 	if (error)
 		goto fail_gunlock3;
+	clear_bit(GLF_INSTANTIATE_NEEDED, &ip->i_gl->gl_flags);
 
 	error = gfs2_trans_begin(sdp, blocks, 0);
 	if (error)