ocfs2: clean up redundant function declarations

ocfs2_extend_allocation() has been deleted, clean up its declaration.
Also change the static function name from __ocfs2_extend_allocation() to
ocfs2_extend_allocation() to be consistent with the corresponding trace
events as well as comments for ocfs2_lock_allocators().

Link: http://lkml.kernel.org/r/09cf7125-6f12-e53e-20f5-e606b2c16b48@huawei.com
Fixes: 964f14a0 ("ocfs2: clean up some dead code")
Signed-off-by: Jia Guo <guojia12@huawei.com>
Acked-by: Joseph Qi <jiangqi903@gmail.com>
Reviewed-by: Jun Piao <piaojun@huawei.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Changwei Ge <ge.changwei@h3c.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

fs/ocfs2/file.c

@@ -563,7 +563,7 @@ int ocfs2_add_inode_data(struct ocfs2_super *osb,
 	return ret;
 }
 
-static int __ocfs2_extend_allocation(struct inode *inode, u32 logical_start,
+static int ocfs2_extend_allocation(struct inode *inode, u32 logical_start,
 				   u32 clusters_to_add, int mark_unwritten)
 {
 	int status = 0;
@@ -1035,7 +1035,7 @@ int ocfs2_extend_no_holes(struct inode *inode, struct buffer_head *di_bh,
 		clusters_to_add -= oi->ip_clusters;
 
 	if (clusters_to_add) {
-		ret = __ocfs2_extend_allocation(inode, oi->ip_clusters,
+		ret = ocfs2_extend_allocation(inode, oi->ip_clusters,
 					      clusters_to_add, 0);
 		if (ret) {
 			mlog_errno(ret);
@@ -1493,7 +1493,7 @@ static int ocfs2_allocate_unwritten_extents(struct inode *inode,
 			goto next;
 		}
 
-		ret = __ocfs2_extend_allocation(inode, cpos, alloc_size, 1);
+		ret = ocfs2_extend_allocation(inode, cpos, alloc_size, 1);
 		if (ret) {
 			if (ret != -ENOSPC)
 				mlog_errno(ret);

fs/ocfs2/file.h

@@ -65,8 +65,6 @@ int ocfs2_extend_no_holes(struct inode *inode, struct buffer_head *di_bh,
 			  u64 new_i_size, u64 zero_to);
 int ocfs2_zero_extend(struct inode *inode, struct buffer_head *di_bh,
 		      loff_t zero_to);
-int ocfs2_extend_allocation(struct inode *inode, u32 logical_start,
-		u32 clusters_to_add, int mark_unwritten);
 int ocfs2_setattr(struct dentry *dentry, struct iattr *attr);
 int ocfs2_getattr(const struct path *path, struct kstat *stat,
 		  u32 request_mask, unsigned int flags);