From: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> Subject: lib/test_bitmap.c: add bitmap_zero()/bitmap_clear() test cases Explicitly test bitmap_zero() and bitmap_clear() functions. Link: http://lkml.kernel.org/r/20180109172430.87452-1-andriy.shevchenko@xxxxxxxxxxxxxxx Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> Reviewed-by: Yury Norov <ynorov@xxxxxxxxxxxxxxxxxx> Cc: Rasmus Villemoes <linux@xxxxxxxxxxxxxxxxxx> Cc: Randy Dunlap <rdunlap@xxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- lib/test_bitmap.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) diff -puN lib/test_bitmap.c~bitmap-add-bitmap_zero-bitmap_clear-test-cases lib/test_bitmap.c --- a/lib/test_bitmap.c~bitmap-add-bitmap_zero-bitmap_clear-test-cases +++ a/lib/test_bitmap.c @@ -105,6 +105,35 @@ __check_eq_u32_array(const char *srcfile #define expect_eq_pbl(...) __expect_eq(pbl, ##__VA_ARGS__) #define expect_eq_u32_array(...) __expect_eq(u32_array, ##__VA_ARGS__) +static void __init test_zero_clear(void) +{ + DECLARE_BITMAP(bmap, 1024); + + /* Known way to set all bits */ + memset(bmap, 0xff, 128); + + expect_eq_pbl("0-22", bmap, 23); + expect_eq_pbl("0-1023", bmap, 1024); + + /* single-word bitmaps */ + bitmap_clear(bmap, 0, 9); + expect_eq_pbl("9-1023", bmap, 1024); + + bitmap_zero(bmap, 35); + expect_eq_pbl("64-1023", bmap, 1024); + + /* cross boundaries operations */ + bitmap_clear(bmap, 79, 19); + expect_eq_pbl("64-78,98-1023", bmap, 1024); + + bitmap_zero(bmap, 115); + expect_eq_pbl("128-1023", bmap, 1024); + + /* Zeroing entire area */ + bitmap_zero(bmap, 1024); + expect_eq_pbl("", bmap, 1024); +} + static void __init test_zero_fill_copy(void) { DECLARE_BITMAP(bmap1, 1024); @@ -309,6 +338,7 @@ static void noinline __init test_mem_opt static int __init test_bitmap_init(void) { + test_zero_clear(); test_zero_fill_copy(); test_bitmap_arr32(); test_bitmap_parselist(); _ -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
