1 files changed, 31 insertions, 175 deletions

diff --git a/lib/test_bitmap.c b/lib/test_bitmap.c
index aa1f2669bdd5..de7ef2996a07 100644
--- a/lib/test_bitmap.c
+++ b/lib/test_bitmap.c
@@ -23,7 +23,7 @@ __check_eq_uint(const char *srcfile, unsigned int line,
                 const unsigned int exp_uint, unsigned int x)
 {
         if (exp_uint != x) {
-                pr_warn("[%s:%u] expected %u, got %u\n",
+                pr_err("[%s:%u] expected %u, got %u\n",
                         srcfile, line, exp_uint, x);
                 return false;
         }
@@ -33,19 +33,13 @@ __check_eq_uint(const char *srcfile, unsigned int line,
 
 static bool __init
 __check_eq_bitmap(const char *srcfile, unsigned int line,
-                  const unsigned long *exp_bmap, unsigned int exp_nbits,
-                  const unsigned long *bmap, unsigned int nbits)
+                  const unsigned long *exp_bmap, const unsigned long *bmap,
+                  unsigned int nbits)
 {
-        if (exp_nbits != nbits) {
-                pr_warn("[%s:%u] bitmap length mismatch: expected %u, got %u\n",
-                        srcfile, line, exp_nbits, nbits);
-                return false;
-        }
-
         if (!bitmap_equal(exp_bmap, bmap, nbits)) {
                 pr_warn("[%s:%u] bitmaps contents differ: expected \"%*pbl\", got \"%*pbl\"\n",
                         srcfile, line,
-                        exp_nbits, exp_bmap, nbits, bmap);
+                        nbits, exp_bmap, nbits, bmap);
                 return false;
         }
         return true;
@@ -69,6 +63,10 @@ __check_eq_pbl(const char *srcfile, unsigned int line,
 static bool __init
 __check_eq_u32_array(const char *srcfile, unsigned int line,
                      const u32 *exp_arr, unsigned int exp_len,
+                     const u32 *arr, unsigned int len) __used;
+static bool __init
+__check_eq_u32_array(const char *srcfile, unsigned int line,
+                     const u32 *exp_arr, unsigned int exp_len,
                      const u32 *arr, unsigned int len)
 {
         if (exp_len != len) {
@@ -255,171 +253,29 @@ static void __init test_bitmap_parselist(void)
         }
 }
 
-static void __init test_bitmap_u32_array_conversions(void)
+static void __init test_bitmap_arr32(void)
 {
-        DECLARE_BITMAP(bmap1, 1024);
-        DECLARE_BITMAP(bmap2, 1024);
-        u32 exp_arr[32], arr[32];
-        unsigned nbits;
-
-        for (nbits = 0 ; nbits < 257 ; ++nbits) {
-                const unsigned int used_u32s = DIV_ROUND_UP(nbits, 32);
-                unsigned int i, rv;
-
-                bitmap_zero(bmap1, nbits);
-                bitmap_set(bmap1, nbits, 1024 - nbits);  /* garbage */
-
-                memset(arr, 0xff, sizeof(arr));
-                rv = bitmap_to_u32array(arr, used_u32s, bmap1, nbits);
-                expect_eq_uint(nbits, rv);
-
-                memset(exp_arr, 0xff, sizeof(exp_arr));
-                memset(exp_arr, 0, used_u32s*sizeof(*exp_arr));
-                expect_eq_u32_array(exp_arr, 32, arr, 32);
-
-                bitmap_fill(bmap2, 1024);
-                rv = bitmap_from_u32array(bmap2, nbits, arr, used_u32s);
-                expect_eq_uint(nbits, rv);
-                expect_eq_bitmap(bmap1, 1024, bmap2, 1024);
-
-                for (i = 0 ; i < nbits ; ++i) {
-                        /*
-                         * test conversion bitmap -> u32[]
-                         */
-
-                        bitmap_zero(bmap1, 1024);
-                        __set_bit(i, bmap1);
-                        bitmap_set(bmap1, nbits, 1024 - nbits);  /* garbage */
-
-                        memset(arr, 0xff, sizeof(arr));
-                        rv = bitmap_to_u32array(arr, used_u32s, bmap1, nbits);
-                        expect_eq_uint(nbits, rv);
-
-                        /* 1st used u32 words contain expected bit set, the
-                         * remaining words are left unchanged (0xff)
-                         */
-                        memset(exp_arr, 0xff, sizeof(exp_arr));
-                        memset(exp_arr, 0, used_u32s*sizeof(*exp_arr));
-                        exp_arr[i/32] = (1U<<(i%32));
-                        expect_eq_u32_array(exp_arr, 32, arr, 32);
-
-
-                        /* same, with longer array to fill
-                         */
-                        memset(arr, 0xff, sizeof(arr));
-                        rv = bitmap_to_u32array(arr, 32, bmap1, nbits);
-                        expect_eq_uint(nbits, rv);
-
-                        /* 1st used u32 words contain expected bit set, the
-                         * remaining words are all 0s
-                         */
-                        memset(exp_arr, 0, sizeof(exp_arr));
-                        exp_arr[i/32] = (1U<<(i%32));
-                        expect_eq_u32_array(exp_arr, 32, arr, 32);
-
-                        /*
-                         * test conversion u32[] -> bitmap
-                         */
-
-                        /* the 1st nbits of bmap2 are identical to
-                         * bmap1, the remaining bits of bmap2 are left
-                         * unchanged (all 1s)
-                         */
-                        bitmap_fill(bmap2, 1024);
-                        rv = bitmap_from_u32array(bmap2, nbits,
-                                                  exp_arr, used_u32s);
-                        expect_eq_uint(nbits, rv);
-
-                        expect_eq_bitmap(bmap1, 1024, bmap2, 1024);
-
-                        /* same, with more bits to fill
-                         */
-                        memset(arr, 0xff, sizeof(arr));  /* garbage */
-                        memset(arr, 0, used_u32s*sizeof(u32));
-                        arr[i/32] = (1U<<(i%32));
-
-                        bitmap_fill(bmap2, 1024);
-                        rv = bitmap_from_u32array(bmap2, 1024, arr, used_u32s);
-                        expect_eq_uint(used_u32s*32, rv);
-
-                        /* the 1st nbits of bmap2 are identical to
-                         * bmap1, the remaining bits of bmap2 are cleared
-                         */
-                        bitmap_zero(bmap1, 1024);
-                        __set_bit(i, bmap1);
-                        expect_eq_bitmap(bmap1, 1024, bmap2, 1024);
-
-
-                        /*
-                         * test short conversion bitmap -> u32[] (1
-                         * word too short)
-                         */
-                        if (used_u32s > 1) {
-                                bitmap_zero(bmap1, 1024);
-                                __set_bit(i, bmap1);
-                                bitmap_set(bmap1, nbits,
-                                           1024 - nbits);  /* garbage */
-                                memset(arr, 0xff, sizeof(arr));
-
-                                rv = bitmap_to_u32array(arr, used_u32s - 1,
-                                                        bmap1, nbits);
-                                expect_eq_uint((used_u32s - 1)*32, rv);
-
-                                /* 1st used u32 words contain expected
-                                 * bit set, the remaining words are
-                                 * left unchanged (0xff)
-                                 */
-                                memset(exp_arr, 0xff, sizeof(exp_arr));
-                                memset(exp_arr, 0,
-                                       (used_u32s-1)*sizeof(*exp_arr));
-                                if ((i/32) < (used_u32s - 1))
-                                        exp_arr[i/32] = (1U<<(i%32));
-                                expect_eq_u32_array(exp_arr, 32, arr, 32);
-                        }
-
-                        /*
-                         * test short conversion u32[] -> bitmap (3
-                         * bits too short)
-                         */
-                        if (nbits > 3) {
-                                memset(arr, 0xff, sizeof(arr));  /* garbage */
-                                memset(arr, 0, used_u32s*sizeof(*arr));
-                                arr[i/32] = (1U<<(i%32));
-
-                                bitmap_zero(bmap1, 1024);
-                                rv = bitmap_from_u32array(bmap1, nbits - 3,
-                                                          arr, used_u32s);
-                                expect_eq_uint(nbits - 3, rv);
-
-                                /* we are expecting the bit < nbits -
-                                 * 3 (none otherwise), and the rest of
-                                 * bmap1 unchanged (0-filled)
-                                 */
-                                bitmap_zero(bmap2, 1024);
-                                if (i < nbits - 3)
-                                        __set_bit(i, bmap2);
-                                expect_eq_bitmap(bmap2, 1024, bmap1, 1024);
-
-                                /* do the same with bmap1 initially
-                                 * 1-filled
-                                 */
-
-                                bitmap_fill(bmap1, 1024);
-                                rv = bitmap_from_u32array(bmap1, nbits - 3,
-                                                         arr, used_u32s);
-                                expect_eq_uint(nbits - 3, rv);
-
-                                /* we are expecting the bit < nbits -
-                                 * 3 (none otherwise), and the rest of
-                                 * bmap1 unchanged (1-filled)
-                                 */
-                                bitmap_zero(bmap2, 1024);
-                                if (i < nbits - 3)
-                                        __set_bit(i, bmap2);
-                                bitmap_set(bmap2, nbits-3, 1024 - nbits + 3);
-                                expect_eq_bitmap(bmap2, 1024, bmap1, 1024);
-                        }
-                }
+        unsigned int nbits, next_bit, len = sizeof(exp) * 8;
+        u32 arr[sizeof(exp) / 4];
+        DECLARE_BITMAP(bmap2, len);
+
+        memset(arr, 0xa5, sizeof(arr));
+
+        for (nbits = 0; nbits < len; ++nbits) {
+                bitmap_to_arr32(arr, exp, nbits);
+                bitmap_from_arr32(bmap2, arr, nbits);
+                expect_eq_bitmap(bmap2, exp, nbits);
+
+                next_bit = find_next_bit(bmap2,
+                                round_up(nbits, BITS_PER_LONG), nbits);
+                if (next_bit < round_up(nbits, BITS_PER_LONG))
+                        pr_err("bitmap_copy_arr32(nbits == %d:"
+                                " tail is not safely cleared: %d\n",
+                                nbits, next_bit);
+
+                if (nbits < len - 32)
+                        expect_eq_uint(arr[DIV_ROUND_UP(nbits, 32)],
+                                                                0xa5a5a5a5);
         }
 }
 
@@ -454,7 +310,7 @@ static void noinline __init test_mem_optimisations(void)
 static int __init test_bitmap_init(void)
 {
         test_zero_fill_copy();
-        test_bitmap_u32_array_conversions();
+        test_bitmap_arr32();
         test_bitmap_parselist();
         test_mem_optimisations();