lib/test_bitmap: correct test data offsets for 32-bit

On 32-bit platform the size of long is only 32 bits which makes wrong
offset in the array of 64 bit size.

Calculate offset based on BITS_PER_LONG.

Link: http://lkml.kernel.org/r/20200109103601.45929-1-andriy.shevchenko@linux.intel.com
Fixes: 30544ed5de43 ("lib/bitmap: introduce bitmap_replace() helper")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reported-by: Guenter Roeck <linux@roeck-us.net>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Yury Norov <yury.norov@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/lib/test_bitmap.c b/lib/test_bitmap.c
index e14a15a..71ec3af 100644 (file)
--- a/lib/test_bitmap.c
+++ b/lib/test_bitmap.c
@@ -275,22 +275,23 @@ static void __init test_copy(void)
 static void __init test_replace(void)
 {
        unsigned int nbits = 64;
+       unsigned int nlongs = DIV_ROUND_UP(nbits, BITS_PER_LONG);
        DECLARE_BITMAP(bmap, 1024);
 
        bitmap_zero(bmap, 1024);
-       bitmap_replace(bmap, &exp2[0], &exp2[1], exp2_to_exp3_mask, nbits);
+       bitmap_replace(bmap, &exp2[0 * nlongs], &exp2[1 * nlongs], exp2_to_exp3_mask, nbits);
        expect_eq_bitmap(bmap, exp3_0_1, nbits);
 
        bitmap_zero(bmap, 1024);
-       bitmap_replace(bmap, &exp2[1], &exp2[0], exp2_to_exp3_mask, nbits);
+       bitmap_replace(bmap, &exp2[1 * nlongs], &exp2[0 * nlongs], exp2_to_exp3_mask, nbits);
        expect_eq_bitmap(bmap, exp3_1_0, nbits);
 
        bitmap_fill(bmap, 1024);
-       bitmap_replace(bmap, &exp2[0], &exp2[1], exp2_to_exp3_mask, nbits);
+       bitmap_replace(bmap, &exp2[0 * nlongs], &exp2[1 * nlongs], exp2_to_exp3_mask, nbits);
        expect_eq_bitmap(bmap, exp3_0_1, nbits);
 
        bitmap_fill(bmap, 1024);
-       bitmap_replace(bmap, &exp2[1], &exp2[0], exp2_to_exp3_mask, nbits);
+       bitmap_replace(bmap, &exp2[1 * nlongs], &exp2[0 * nlongs], exp2_to_exp3_mask, nbits);
        expect_eq_bitmap(bmap, exp3_1_0, nbits);
 }