Commit 7f8a30e5 authored by Coly Li's avatar Coly Li Committed by Song Liu
Browse files

raid5: update code comment of scribble_alloc() 



Code comments of scribble_alloc() is outdated for a while. This patch
update the comments in function header for the new parameter list.

Suggested-by: default avatarSong Liu <songliubraving@fb.com>
Signed-off-by: default avatarColy Li <colyli@suse.de>
Signed-off-by: default avatarSong Liu <songliubraving@fb.com>
parent ba54d4d4

drivers/md/raid5.c

+5 −2
Original line number Diff line number Diff line
@@ -2215,10 +2215,13 @@ static int grow_stripes(struct r5conf *conf, int num) 
}



/**

 * scribble_len - return the required size of the scribble region

 * scribble_alloc - allocate percpu scribble buffer for required size

 *		    of the scribble region

 * @percpu - from for_each_present_cpu() of the caller

 * @num - total number of disks in the array

 * @cnt - scribble objs count for required size of the scribble region

 *

 * The size must be enough to contain:

 * The scribble buffer size must be enough to contain:

 * 1/ a struct page pointer for each device in the array +2

 * 2/ room to convert each entry in (1) to its corresponding dma

 *    (dma_map_page()) or page (page_address()) address.

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