gfs2: Eliminate GIF_INVALID flag

With the addition of the new GLF_INSTANTIATE_NEEDED flag, the
GIF_INVALID flag is now redundant. This patch removes it.
Since inode_instantiate is only called when instantiation is needed,
the check in inode_instantiate is removed too.
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>

fs/gfs2/glops.c

@@ -356,7 +356,6 @@ static void inode_go_inval(struct gfs2_glock *gl, int flags)
 		struct address_space *mapping = gfs2_glock2aspace(gl);
 		truncate_inode_pages(mapping, 0);
 		if (ip) {
-			set_bit(GIF_INVALID, &ip->i_flags);
 			set_bit(GLF_INSTANTIATE_NEEDED, &gl->gl_flags);
 			forget_all_cached_acls(&ip->i_inode);
 			security_inode_invalidate_secctx(&ip->i_inode);
@@ -477,8 +476,6 @@ int gfs2_inode_refresh(struct gfs2_inode *ip)
 
 	error = gfs2_dinode_in(ip, dibh->b_data);
 	brelse(dibh);
-	clear_bit(GIF_INVALID, &ip->i_flags);
-
 	return error;
 }
 
@@ -499,11 +496,9 @@ static int inode_go_instantiate(struct gfs2_holder *gh)
 	if (!ip) /* no inode to populate - read it in later */
 		goto out;
 
-	if (test_bit(GIF_INVALID, &ip->i_flags)) {
 	error = gfs2_inode_refresh(ip);
 	if (error)
 		goto out;
-	}
 
 	if (gh->gh_state != LM_ST_DEFERRED)
 		inode_dio_wait(&ip->i_inode);

fs/gfs2/incore.h

@@ -373,7 +373,6 @@ struct gfs2_glock {
 };
 
 enum {
-	GIF_INVALID		= 0,
 	GIF_QD_LOCKED		= 1,
 	GIF_ALLOC_FAILED	= 2,
 	GIF_SW_PAGED		= 3,

fs/gfs2/inode.c

@@ -182,7 +182,6 @@ struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type,
 		}
 
 		glock_set_object(ip->i_gl, ip);
-		set_bit(GIF_INVALID, &ip->i_flags);
 		set_bit(GLF_INSTANTIATE_NEEDED, &ip->i_gl->gl_flags);
 		error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
 		if (unlikely(error))

fs/gfs2/super.c

@@ -1244,7 +1244,7 @@ static enum dinode_demise evict_should_delete(struct inode *inode,
 	if (ret)
 		return SHOULD_NOT_DELETE_DINODE;
 
-	if (test_bit(GIF_INVALID, &ip->i_flags)) {
+	if (test_bit(GLF_INSTANTIATE_NEEDED, &ip->i_gl->gl_flags)) {
 		ret = gfs2_instantiate(gh);
 		if (ret)
 			return SHOULD_NOT_DELETE_DINODE;