[GFS2] Pass the correct value to kunmap_atomic

Pass kaddr rather than (incorrect) struct page to kunmap_atomic.
Signed-off-by: NRussell Cattelan <cattelan@redhat.com>
Signed-off-by: NSteven Whitehouse <swhiteho@redhat.com>

fs/gfs2/lops.c

@@ -492,7 +492,7 @@ static int gfs2_check_magic(struct buffer_head *bh)
 	ptr = kaddr + bh_offset(bh);
 	if (*ptr == cpu_to_be32(GFS2_MAGIC))
 		rv = 1;
-	kunmap_atomic(page, KM_USER0);
+	kunmap_atomic(kaddr, KM_USER0);
 
 	return rv;
 }
@@ -626,7 +626,7 @@ static void databuf_lo_before_commit(struct gfs2_sbd *sdp)
 				memcpy(bh->b_data,
 				       kaddr + bh_offset(bd2->bd_bh),
 				       sdp->sd_sb.sb_bsize);
-				kunmap_atomic(page, KM_USER0);
+				kunmap_atomic(kaddr, KM_USER0);
 				*(__be32 *)bh->b_data = 0;
 			} else {
 				bh = gfs2_log_fake_buf(sdp, bd2->bd_bh);

fs/gfs2/ops_address.c

@@ -162,7 +162,7 @@ static int zero_readpage(struct page *page)
 
 	kaddr = kmap_atomic(page, KM_USER0);
 	memset(kaddr, 0, PAGE_CACHE_SIZE);
-	kunmap_atomic(page, KM_USER0);
+	kunmap_atomic(kaddr, KM_USER0);
 
 	SetPageUptodate(page);
 
@@ -195,7 +195,7 @@ static int stuffed_readpage(struct gfs2_inode *ip, struct page *page)
 	memcpy(kaddr, dibh->b_data + sizeof(struct gfs2_dinode),
 	       ip->i_di.di_size);
 	memset(kaddr + ip->i_di.di_size, 0, PAGE_CACHE_SIZE - ip->i_di.di_size);
-	kunmap_atomic(page, KM_USER0);
+	kunmap_atomic(kaddr, KM_USER0);
 
 	brelse(dibh);
 
@@ -485,7 +485,7 @@ static int gfs2_commit_write(struct file *file, struct page *page,
 		kaddr = kmap_atomic(page, KM_USER0);
 		memcpy(dibh->b_data + sizeof(struct gfs2_dinode) + from,
 		       kaddr + from, to - from);
-		kunmap_atomic(page, KM_USER0);
+		kunmap_atomic(kaddr, KM_USER0);
 
 		SetPageUptodate(page);