btrfs: raid56: open code rbio_stripe_page_index()

There is only one caller for that helper now, and we're definitely fine
to open-code it.

Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/raid56.c b/fs/btrfs/raid56.c
index 262cabe7953f385671114b85236a6ad0937215a6..84eb4890eea1564c69831eeb8220d8210a47e321 100644 (file)
--- a/fs/btrfs/raid56.c
+++ b/fs/btrfs/raid56.c
@@ -701,11 +701,6 @@ static struct sector_ptr *rbio_qstripe_sector(const struct btrfs_raid_bio *rbio,
        return rbio_stripe_sector(rbio, rbio->nr_data + 1, sector_nr);
 }
 
-static int rbio_stripe_page_index(struct btrfs_raid_bio *rbio, int stripe, int index)
-{
-       return stripe * rbio->stripe_npages + index;
-}
-
 /*
  * The first stripe in the table for a logical address
  * has the lock.  rbios are added in one of three ways:
@@ -1116,7 +1111,7 @@ static int alloc_rbio_pages(struct btrfs_raid_bio *rbio)
 /* only allocate pages for p/q stripes */
 static int alloc_rbio_parity_pages(struct btrfs_raid_bio *rbio)
 {
-       int data_pages = rbio_stripe_page_index(rbio, rbio->nr_data, 0);
+       const int data_pages = rbio->nr_data * rbio->stripe_npages;
        int ret;
 
        ret = btrfs_alloc_page_array(rbio->nr_pages - data_pages,