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Commit 25d71cb9 authored by Alex Elder's avatar Alex Elder Committed by Sage Weil
Browse files

ceph: use page_offset() in ceph_writepages_start() 

There's one spot in ceph_writepages_start() that open-codes what
page_offset() does safely.  Use the macro so we don't have to worry
about wrapping.

This resolves:
    http://tracker.ceph.com/issues/4648



Signed-off-by: default avatarAlex Elder <elder@inktank.com>
Reviewed-by: default avatarJosh Durgin <josh.durgin@inktank.com>
parent ef4859d6

fs/ceph/addr.c

+1 −1
Original line number Diff line number Diff line
@@ -900,7 +900,7 @@ static int ceph_writepages_start(struct address_space *mapping, 
		}



		/* submit the write */

		offset = req->r_data_out.pages[0]->index << PAGE_CACHE_SHIFT;

		offset = page_offset(req->r_data_out.pages[0]);

		len = min((snap_size ? snap_size : i_size_read(inode)) - offset,

			  (u64)locked_pages << PAGE_CACHE_SHIFT);

		dout("writepages got %d pages at %llu~%llu\n",