On Thu, Jul 09, 2026 at 01:40:06PM +0200, Christophe Leroy (CS GROUP) wrote:
> 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.
Reviewed-by: Andy Shevchenko <[email protected]>
Thanks!
--
With Best Regards,
Andy Shevchenko
