Erhard reports failure of bitmap tests on powerpc:
test_bitmap: loaded.
test_bitmap: [lib/test_bitmap.c:397] bitmaps contents differ: expected
"1,3-4,9", got "1,3-4,9,65-71,73-79,81-87,89-95,97-99"
test_bitmap: parselist('0-2047:128/256'): 912
test_bitmap: scnprintf("%*pbl", '0-32767'): 5977
test_bitmap: test_bitmap_read_perf: 1191082
test_bitmap: test_bitmap_write_perf: 1270153
test_bitmap: failed 1 out of 208655 tests
The happens mainly when CONFIG_INIT_STACK_ALL_PATTERN is set.
Commit 6b5a4b687367 ("bitmap: Add test for out-of-boundary
modifications for scatter & gather") extended the test to
out-of-boundary bits, but those bits where left uninitialised.
Properly initialise the entire result bitmap before the test.
Reported-by: Erhard Furtner <[email protected]>
Closes:
https://lore.kernel.org/all/[email protected]
Fixes: 6b5a4b687367 ("bitmap: Add test for out-of-boundary modifications for
scatter & gather")
Signed-off-by: Christophe Leroy (CS GROUP) <[email protected]>
---
lib/test_bitmap.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/lib/test_bitmap.c b/lib/test_bitmap.c
index 69813c10e6c0..448c3eb48a4a 100644
--- a/lib/test_bitmap.c
+++ b/lib/test_bitmap.c
@@ -392,6 +392,7 @@ static void __init test_bitmap_sg(void)
/* Scatter/gather relationship */
bitmap_zero(bmap_tmp, 100);
+ bitmap_zero(bmap_res, 100);
bitmap_gather(bmap_tmp, bmap_scatter, sg_mask, nbits);
bitmap_scatter(bmap_res, bmap_tmp, sg_mask, nbits);
expect_eq_bitmap(bmap_scatter, bmap_res, 100);
--
2.54.0
