Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
bitmap: test bitmap_weight() for more
Test the function for correctness when some bits are set in the last word
of bitmap beyond nbits. This is motivated by commit a9dadc1c512807f9
("powerpc/xive: Fix the size of the cpumask used in
xive_find_target_in_mask()").
Signed-off-by: Yury Norov <ynorov@nvidia.com>
+19
+19
lib/test_bitmap.c
+19
lib/test_bitmap.c
···
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{
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unsigned int bit, w1, w2, w;
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DECLARE_BITMAP(b, 30);
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DECLARE_BITMAP(b1, 128);
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bitmap_parselist("all:1/2", b, 30);
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···
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w2 = bitmap_weight_from(exp1, bit, EXP1_IN_BITS);
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expect_eq_uint(w1 + w2, w);
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}
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+
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/* Test out-of-range */
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w = bitmap_weight_from(b, 31, 30);
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expect_eq_uint(0, !!(w < 30));
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+
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/*
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* Test bitmap_weight() for correctness in case of some bits set between
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* nbits and end of the last word.
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*/
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bitmap_fill(b1, 128);
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/* Inline */
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expect_eq_uint(30, bitmap_weight(b1, 30));
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expect_eq_uint(100, bitmap_weight(b1, 100));
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/* Outline */
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for (int i = 1; i < 128; i++)
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expect_eq_uint(i, bitmap_weight(b1, i));
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}
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static void __init test_for_each_clear_bit(void)