xfs: rename block gc start and stop functions

Shorten the names of the two functions that start and stop block
preallocation garbage collection and move them up to the other blockgc
functions.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
diff --git a/fs/xfs/xfs_icache.h b/fs/xfs/xfs_icache.h
index 5c57476..d1fddb1 100644
--- a/fs/xfs/xfs_icache.h
+++ b/fs/xfs/xfs_icache.h
@@ -75,7 +75,7 @@ int xfs_inode_walk(struct xfs_mount *mp, int iter_flags,
 int xfs_icache_inode_is_allocated(struct xfs_mount *mp, struct xfs_trans *tp,
 				  xfs_ino_t ino, bool *inuse);
 
-void xfs_stop_block_reaping(struct xfs_mount *mp);
-void xfs_start_block_reaping(struct xfs_mount *mp);
+void xfs_blockgc_stop(struct xfs_mount *mp);
+void xfs_blockgc_start(struct xfs_mount *mp);
 
 #endif