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: Michael Walle <michael@walle.cc>
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Link: https://lore.kernel.org/r/20210305234552.19204-1-michael@walle.cc

diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c
index 0522304..4a315cb 100644 (file)
--- a/drivers/mtd/spi-nor/core.c
+++ b/drivers/mtd/spi-nor/core.c
@@ -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;