system/linux
system/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux synced 2024-09-21 03:28:37 +00:00
Code Issues Packages Projects Releases Wiki Activity

mtd: spi-nor: use is_power_of_2()

Browse source 
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
This commit is contained in:
Michael Walle 2021-03-06 00:45:52 +01:00 committed by Tudor Ambarus
parent ff013330fb
commit 04fc298c7d
1 changed files with 1 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

5
drivers/mtd/spi-nor/core.c
View file

@ -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;