Commit 04fc298c authored by Michael Walle's avatar Michael Walle Committed by Tudor Ambarus
Browse files

mtd: spi-nor: use is_power_of_2() 



There is already a function to check if an integer is a power of 2. Use
it.

Signed-off-by: default avatarMichael Walle <michael@walle.cc>
Signed-off-by: default avatarTudor Ambarus <tudor.ambarus@microchip.com>
Link: https://lore.kernel.org/r/20210305234552.19204-1-michael@walle.cc
parent ff013330

drivers/mtd/spi-nor/core.c

+1 −4
Original line number Diff line number Diff line
@@ -2336,11 +2336,8 @@ static int spi_nor_write(struct mtd_info *mtd, loff_t to, size_t len, 
		 * If page_size is a power of two, the offset can be quickly

		 * calculated with an AND operation. On the other cases we

		 * need to do a modulus operation (more expensive).

		 * Power of two numbers have only one bit set and we can use

		 * the instruction hweight32 to detect if we need to do a

		 * modulus (do_div()) or not.

		 */

		if (hweight32(nor->page_size) == 1) {

		if (is_power_of_2(nor->page_size)) {

			page_offset = addr & (nor->page_size - 1);

		} else {

			uint64_t aux = addr;