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f2fs: fix 32-bit build

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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'

Fortunately, bdev_zone_size() is guaranteed to return a power-of-two
number, so we can replace the % operator with a cheaper bit mask.

Fixes: 792b84b74b54 ("f2fs: support multiple devices")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Arnd Bergmann 2016-11-22 15:20:16 +01:00 committed by Jaegeuk Kim
parent 05e6ea2685
commit 19c526515f
1 changed files with 2 additions and 1 deletions
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3
fs/f2fs/segment.c
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@ -693,7 +693,8 @@ 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)) {
if (sector & (bdev_zone_size(bdev) - 1) ||
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: "",