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bitmap: Add test for out-of-boundary modifications for scatter & gather

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Make sure that bitmap_scatter() and bitmap_gather() do not modify
the bits outside of the given nbits span.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Yury Norov <ynorov@nvidia.com>
This commit is contained in:
Andy Shevchenko 2026-02-26 12:16:44 +01:00 committed by Yury Norov
parent c369299895
commit 6b5a4b6873
1 changed files with 7 additions and 3 deletions
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10
lib/test_bitmap.c
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@ -354,18 +354,22 @@ static void __init test_replace(void)
static const unsigned long sg_mask[] __initconst = {
BITMAP_FROM_U64(0x000000000000035aULL),
BITMAP_FROM_U64(0x0000000000000000ULL),
};
static const unsigned long sg_src[] __initconst = {
BITMAP_FROM_U64(0x0000000000000667ULL),
BITMAP_FROM_U64(0x0000000000000000ULL),
};
static const unsigned long sg_gather_exp[] __initconst = {
BITMAP_FROM_U64(0x0000000000000029ULL),
BITMAP_FROM_U64(0x0000000000000000ULL),
};
static const unsigned long sg_scatter_exp[] __initconst = {
BITMAP_FROM_U64(0x000000000000021aULL),
BITMAP_FROM_U64(0x0000000000000000ULL),
};
static void __init test_bitmap_sg(void)
@ -379,18 +383,18 @@ static void __init test_bitmap_sg(void)
/* Simple gather call */
bitmap_zero(bmap_gather, 100);
bitmap_gather(bmap_gather, sg_src, sg_mask, nbits);
expect_eq_bitmap(sg_gather_exp, bmap_gather, nbits);
expect_eq_bitmap(sg_gather_exp, bmap_gather, 100);
/* Simple scatter call */
bitmap_zero(bmap_scatter, 100);
bitmap_scatter(bmap_scatter, sg_src, sg_mask, nbits);
expect_eq_bitmap(sg_scatter_exp, bmap_scatter, nbits);
expect_eq_bitmap(sg_scatter_exp, bmap_scatter, 100);
/* Scatter/gather relationship */
bitmap_zero(bmap_tmp, 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, nbits);
expect_eq_bitmap(bmap_scatter, bmap_res, 100);
}
#define PARSE_TIME 0x1