@@ -685,6 +685,7 @@ static int __f2fs_issue_discard_zone(struct f2fs_sb_info *sbi,
{
sector_t nr_sects = SECTOR_FROM_BLOCK(blklen);
sector_t sector;
+ u32 rem;
int devi = 0;
if (sbi->s_ndevs) {
@@ -693,7 +694,8 @@ static int __f2fs_issue_discard_zone(struct f2fs_sb_info *sbi,
}
sector = SECTOR_FROM_BLOCK(blkstart);
- if (sector % bdev_zone_size(bdev) || nr_sects != bdev_zone_size(bdev)) {
+ div_u64_rem(sector, bdev_zone_size(bdev), &rem);
+ if (rem || nr_sects != bdev_zone_size(bdev)) {
f2fs_msg(sbi->sb, KERN_INFO,
"(%d) %s: Unaligned discard attempted (block %x + %x)",
devi, sbi->s_ndevs ? FDEV(devi).path: "",
The addition of multiple-device support broke CONFIG_BLK_DEV_ZONED on 32-bit machines because of a 64-bit division: fs/f2fs/f2fs.o: In function `__issue_discard_async': extent_cache.c:(.text.__issue_discard_async+0xd4): undefined reference to `__aeabi_uldivmod' Unfortunately, the sector number is usually a 64-bit number, and we probably can't guarantee that bdev_zone_size() returns a power-of-two number, so we actually have to do the expensive 64-bit operation to get the remainder. Fixes: 792b84b74b54 ("f2fs: support multiple devices") Signed-off-by: Arnd Bergmann <arnd@arndb.de> --- fs/f2fs/segment.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) -- 2.9.0