alloc_buffer_head  831 fs/buffer.c    		bh = alloc_buffer_head(gfp);
alloc_buffer_head 3366 fs/buffer.c    EXPORT_SYMBOL(alloc_buffer_head);
alloc_buffer_head  361 fs/jbd2/journal.c 	new_bh = alloc_buffer_head(GFP_NOFS|__GFP_NOFAIL);
alloc_buffer_head  197 include/linux/buffer_head.h struct buffer_head *alloc_buffer_head(gfp_t gfp_flags);