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lib/test_bitmap.c: add for_each_set_clump8 test cases 

The introduction of the for_each_set_clump8 macro warrants test cases to
verify the implementation.  This patch adds test case checks for whether
an out-of-bounds clump index is returned, a zero clump is returned, or
the returned clump value differs from the expected clump value.

Link: http://lkml.kernel.org/r/febc0fb8151e3e3fdd61c34da9193d1c4d7e6c12.1570641097.git.vilhelm.gray@gmail.com
Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Tested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Lukas Wunner <lukas@wunner.de>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Mathias Duckeck <m.duckeck@kunbus.de>
Cc: Morten Hein Tiljeset <morten.tiljeset@prevas.dk>
Cc: Phil Reid <preid@electromag.com.au>
Cc: Sean Nyekjaer <sean.nyekjaer@prevas.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
William Breathitt Gray 2019-12-04 16:51:01 -08:00 committed by Linus Torvalds
parent 169c474fb2
commit e4aa168de8
1 changed files with 65 additions and 0 deletions
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65
lib/test_bitmap.c
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@ -92,6 +92,36 @@ __check_eq_u32_array(const char *srcfile, unsigned int line,
return true;
}
static bool __init __check_eq_clump8(const char *srcfile, unsigned int line,
const unsigned int offset,
const unsigned int size,
const unsigned char *const clump_exp,
const unsigned long *const clump)
{
unsigned long exp;
if (offset >= size) {
pr_warn("[%s:%u] bit offset for clump out-of-bounds: expected less than %u, got %u\n",
srcfile, line, size, offset);
return false;
}
exp = clump_exp[offset / 8];
if (!exp) {
pr_warn("[%s:%u] bit offset for zero clump: expected nonzero clump, got bit offset %u with clump value 0",
srcfile, line, offset);
return false;
}
if (*clump != exp) {
pr_warn("[%s:%u] expected clump value of 0x%lX, got clump value of 0x%lX",
srcfile, line, exp, *clump);
return false;
}
return true;
}
#define __expect_eq(suffix, ...) \
({ \
int result = 0; \
@ -108,6 +138,7 @@ __check_eq_u32_array(const char *srcfile, unsigned int line,
#define expect_eq_bitmap(...) __expect_eq(bitmap, ##__VA_ARGS__)
#define expect_eq_pbl(...) __expect_eq(pbl, ##__VA_ARGS__)
#define expect_eq_u32_array(...) __expect_eq(u32_array, ##__VA_ARGS__)
#define expect_eq_clump8(...) __expect_eq(clump8, ##__VA_ARGS__)
static void __init test_zero_clear(void)
{
@ -404,6 +435,39 @@ static void noinline __init test_mem_optimisations(void)
}
}
static const unsigned char clump_exp[] __initconst = {
0x01, /* 1 bit set */
0x02, /* non-edge 1 bit set */
0x00, /* zero bits set */
0x38, /* 3 bits set across 4-bit boundary */
0x38, /* Repeated clump */
0x0F, /* 4 bits set */
0xFF, /* all bits set */
0x05, /* non-adjacent 2 bits set */
};
static void __init test_for_each_set_clump8(void)
{
#define CLUMP_EXP_NUMBITS 64
DECLARE_BITMAP(bits, CLUMP_EXP_NUMBITS);
unsigned int start;
unsigned long clump;
/* set bitmap to test case */
bitmap_zero(bits, CLUMP_EXP_NUMBITS);
bitmap_set(bits, 0, 1); /* 0x01 */
bitmap_set(bits, 9, 1); /* 0x02 */
bitmap_set(bits, 27, 3); /* 0x28 */
bitmap_set(bits, 35, 3); /* 0x28 */
bitmap_set(bits, 40, 4); /* 0x0F */
bitmap_set(bits, 48, 8); /* 0xFF */
bitmap_set(bits, 56, 1); /* 0x05 - part 1 */
bitmap_set(bits, 58, 1); /* 0x05 - part 2 */
for_each_set_clump8(start, clump, bits, CLUMP_EXP_NUMBITS)
expect_eq_clump8(start, CLUMP_EXP_NUMBITS, clump_exp, &clump);
}
static void __init selftest(void)
{
test_zero_clear();
@ -413,6 +477,7 @@ static void __init selftest(void)
test_bitmap_parselist();
test_bitmap_parselist_user();
test_mem_optimisations();
test_for_each_set_clump8();
}
KSTM_MODULE_LOADERS(test_bitmap);