mtd: rename random32() to prandom_u32()

Use more preferable function name which implies using a pseudo-random
number generator.
Signed-off-by: NAkinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: NArtem Bityutskiy <artem.bityutskiy@linux.intel.com>

drivers/mtd/nand/nandsim.c

@@ -1476,12 +1476,12 @@ int do_read_error(struct nandsim *ns, int num)
 
 void do_bit_flips(struct nandsim *ns, int num)
 {
-	if (bitflips && random32() < (1 << 22)) {
+	if (bitflips && prandom_u32() < (1 << 22)) {
 		int flips = 1;
 		if (bitflips > 1)
-			flips = (random32() % (int) bitflips) + 1;
+			flips = (prandom_u32() % (int) bitflips) + 1;
 		while (flips--) {
-			int pos = random32() % (num * 8);
+			int pos = prandom_u32() % (num * 8);
 			ns->buf.byte[pos / 8] ^= (1 << (pos % 8));
 			NS_WARN("read_page: flipping bit %d in page %d "
 				"reading from %d ecc: corrected=%u failed=%u\n",

drivers/mtd/tests/mtd_nandecctest.c

@@ -44,7 +44,7 @@ struct nand_ecc_test {
 static void single_bit_error_data(void *error_data, void *correct_data,
 				size_t size)
 {
-	unsigned int offset = random32() % (size * BITS_PER_BYTE);
+	unsigned int offset = prandom_u32() % (size * BITS_PER_BYTE);
 
 	memcpy(error_data, correct_data, size);
 	__change_bit_le(offset, error_data);
@@ -55,9 +55,9 @@ static void double_bit_error_data(void *error_data, void *correct_data,
 {
 	unsigned int offset[2];
 
-	offset[0] = random32() % (size * BITS_PER_BYTE);
+	offset[0] = prandom_u32() % (size * BITS_PER_BYTE);
 	do {
-		offset[1] = random32() % (size * BITS_PER_BYTE);
+		offset[1] = prandom_u32() % (size * BITS_PER_BYTE);
 	} while (offset[0] == offset[1]);
 
 	memcpy(error_data, correct_data, size);
@@ -68,7 +68,7 @@ static void double_bit_error_data(void *error_data, void *correct_data,
 
 static unsigned int random_ecc_bit(size_t size)
 {
-	unsigned int offset = random32() % (3 * BITS_PER_BYTE);
+	unsigned int offset = prandom_u32() % (3 * BITS_PER_BYTE);
 
 	if (size == 256) {
 		/*
@@ -76,7 +76,7 @@ static unsigned int random_ecc_bit(size_t size)
 		 * and 17th bit) in ECC code for 256 byte data block
 		 */
 		while (offset == 16 || offset == 17)
-			offset = random32() % (3 * BITS_PER_BYTE);
+			offset = prandom_u32() % (3 * BITS_PER_BYTE);
 	}
 
 	return offset;

drivers/mtd/tests/mtd_stresstest.c

@@ -55,7 +55,7 @@ static int rand_eb(void)
 	unsigned int eb;
 
 again:
-	eb = random32();
+	eb = prandom_u32();
 	/* Read or write up 2 eraseblocks at a time - hence 'ebcnt - 1' */
 	eb %= (ebcnt - 1);
 	if (bbt[eb])
@@ -67,7 +67,7 @@ static int rand_offs(void)
 {
 	unsigned int offs;
 
-	offs = random32();
+	offs = prandom_u32();
 	offs %= bufsize;
 	return offs;
 }
@@ -76,7 +76,7 @@ static int rand_len(int offs)
 {
 	unsigned int len;
 
-	len = random32();
+	len = prandom_u32();
 	len %= (bufsize - offs);
 	return len;
 }
@@ -191,7 +191,7 @@ static int do_write(void)
 
 static int do_operation(void)
 {
-	if (random32() & 1)
+	if (prandom_u32() & 1)
 		return do_read();
 	else
 		return do_write();

drivers/mtd/ubi/debug.h

@@ -86,7 +86,7 @@ static inline int ubi_dbg_is_bgt_disabled(const struct ubi_device *ubi)
 static inline int ubi_dbg_is_bitflip(const struct ubi_device *ubi)
 {
 	if (ubi->dbg.emulate_bitflips)
-		return !(random32() % 200);
+		return !(prandom_u32() % 200);
 	return 0;
 }
 
@@ -100,7 +100,7 @@ static inline int ubi_dbg_is_bitflip(const struct ubi_device *ubi)
 static inline int ubi_dbg_is_write_failure(const struct ubi_device *ubi)
 {
 	if (ubi->dbg.emulate_io_failures)
-		return !(random32() % 500);
+		return !(prandom_u32() % 500);
 	return 0;
 }
 
@@ -114,7 +114,7 @@ static inline int ubi_dbg_is_write_failure(const struct ubi_device *ubi)
 static inline int ubi_dbg_is_erase_failure(const struct ubi_device *ubi)
 {
 	if (ubi->dbg.emulate_io_failures)
-		return !(random32() % 400);
+		return !(prandom_u32() % 400);
 	return 0;
 }