[PATCH] mtd: maps: physmap-core: fix flash size larger than 32-bit

[Baruch Siach]

mtd-ram can potentially be larger than 4GB. get_bitmask_order() uses
fls() that is not guaranteed to work with values larger than 32-bit.
Specifically on aarch64 fls() returns 0 when all 32 LSB bits are clear.
Use fls64() instead.

Fixes: ba32ce95cbd987 ("mtd: maps: Merge gpio-addr-flash.c into physmap-core.c")
Signed-off-by: Baruch Siach <baruch at tkos.co.il>
---
 drivers/mtd/maps/physmap-core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mtd/maps/physmap-core.c b/drivers/mtd/maps/physmap-core.c
index 746a27d15d44..96eb2e782c38 100644
--- a/drivers/mtd/maps/physmap-core.c
+++ b/drivers/mtd/maps/physmap-core.c
@@ -518,7 +518,7 @@ static int physmap_flash_probe(struct platform_device *dev)
 		if (!info->maps[i].phys)
 			info->maps[i].phys = res->start;
 
-		info->win_order = get_bitmask_order(resource_size(res)) - 1;
+		info->win_order = fls64(resource_size(res)) - 1;
 		info->maps[i].size = BIT(info->win_order +
 					 (info->gpios ?
 					  info->gpios->ndescs : 0));
-- 
2.43.0