dm flakey: fix a bug with 32-bit highmem systems

The function page_address does not work with 32-bit systems with high memory. Use bvec_kmap_local/kunmap_local instead. Cc: [email protected] Signed-off-by: Mikulas Patocka <[email protected]> Reviewed-by: Sweet Tea Dorminy <[email protected]> Signed-off-by: Mike Snitzer <[email protected]>
tobetter · Feb 1, 2023 · 8eb29c4 · 8eb29c4
1 parent f50714b
commit 8eb29c4
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/drivers/md/dm-flakey.c b/drivers/md/dm-flakey.c
@@ -307,8 +307,9 @@ static void corrupt_bio_data(struct bio *bio, struct flakey_c *fc)
 			struct page *page = bio_iter_page(bio, iter);
 			if (unlikely(page == ZERO_PAGE(0)))
 				break;
-			segment = (page_address(page) + bio_iter_offset(bio, iter));
+			segment = bvec_kmap_local(&bvec);
 			segment[corrupt_bio_byte] = fc->corrupt_bio_value;
+			kunmap_local(segment);
 			DMDEBUG("Corrupting data bio=%p by writing %u to byte %u "
 				"(rw=%c bi_opf=%u bi_sector=%llu size=%u)\n",
 				bio, fc->corrupt_bio_value, fc->corrupt_bio_byte,