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

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@tkos.co.il>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/9fbf3664ce00f8b07867f1011834015f21d162a5.1707388458.git.baruch@tkos.co.il

authored by

Baruch Siach and committed by
Miquel Raynal 3884f03e 18af7e35

+1 -1
+1 -1
drivers/mtd/maps/physmap-core.c
··· 518 518 if (!info->maps[i].phys) 519 519 info->maps[i].phys = res->start; 520 520 521 - info->win_order = get_bitmask_order(resource_size(res)) - 1; 521 + info->win_order = fls64(resource_size(res)) - 1; 522 522 info->maps[i].size = BIT(info->win_order + 523 523 (info->gpios ? 524 524 info->gpios->ndescs : 0));