Re: [PATCH] f2fs: introduce gcless mount option to avoid foreground GC
From: kernel test robot
Date: Sat Jul 18 2026 - 03:53:11 EST
Hi Yonggil,
kernel test robot noticed the following build warnings:
[auto build test WARNING on cb8ff3ead9a3fc43727980be58c7099506f65261]
url: https://github.com/intel-lab-lkp/linux/commits/Yonggil-Song/f2fs-introduce-gcless-mount-option-to-avoid-foreground-GC/20260706-154229
base: cb8ff3ead9a3fc43727980be58c7099506f65261
patch link: https://lore.kernel.org/r/20260706062043epcms2p16928216befdca1242bc2d3cd7cb34afe%40epcms2p1
patch subject: [PATCH] f2fs: introduce gcless mount option to avoid foreground GC
config: i386-randconfig-2006-20250825 (https://download.01.org/0day-ci/archive/20260718/202607180917.doNNtTXN-lkp@xxxxxxxxx/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260718/202607180917.doNNtTXN-lkp@xxxxxxxxx/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202607180917.doNNtTXN-lkp@xxxxxxxxx/
All warnings (new ones prefixed by >>):
In file included from include/linux/bits.h:5,
from include/linux/bitops.h:6,
from include/linux/log2.h:12,
from arch/x86/include/asm/div64.h:8,
from include/linux/math.h:6,
from include/linux/math64.h:6,
from include/linux/time.h:6,
from include/linux/stat.h:19,
from include/linux/fs_dirent.h:5,
from include/linux/fs/super_types.h:5,
from include/linux/fs/super.h:5,
from include/linux/fs.h:5,
from fs/f2fs/dir.c:9:
fs/f2fs/f2fs.h: In function 'inc_valid_node_count':
>> include/vdso/bits.h:7:40: warning: left shift count >= width of type [-Wshift-count-overflow]
7 | #define BIT(nr) (UL(1) << (nr))
| ^~
fs/f2fs/f2fs.h:150:33: note: in expansion of macro 'BIT'
150 | (F2FS_OPTION(sbi).opt & BIT(F2FS_MOUNT_##option))
| ^~~
fs/f2fs/f2fs.h:2945:25: note: in expansion of macro 'test_opt'
2945 | test_opt(sbi, RESERVE_NODE));
| ^~~~~~~~
>> include/vdso/bits.h:7:40: warning: left shift count >= width of type [-Wshift-count-overflow]
7 | #define BIT(nr) (UL(1) << (nr))
| ^~
fs/f2fs/f2fs.h:150:33: note: in expansion of macro 'BIT'
150 | (F2FS_OPTION(sbi).opt & BIT(F2FS_MOUNT_##option))
| ^~~
fs/f2fs/f2fs.h:2953:13: note: in expansion of macro 'test_opt'
2953 | if (test_opt(sbi, RESERVE_NODE) &&
| ^~~~~~~~
--
In file included from include/linux/bits.h:5,
from include/linux/ratelimit_types.h:5,
from include/linux/printk.h:9,
from include/asm-generic/bug.h:31,
from arch/x86/include/asm/bug.h:193,
from arch/x86/include/asm/alternative.h:9,
from arch/x86/include/asm/barrier.h:5,
from include/linux/list.h:11,
from include/linux/module.h:12,
from fs/f2fs/super.c:8:
fs/f2fs/f2fs.h: In function 'inc_valid_node_count':
>> include/vdso/bits.h:7:40: warning: left shift count >= width of type [-Wshift-count-overflow]
7 | #define BIT(nr) (UL(1) << (nr))
| ^~
fs/f2fs/f2fs.h:150:33: note: in expansion of macro 'BIT'
150 | (F2FS_OPTION(sbi).opt & BIT(F2FS_MOUNT_##option))
| ^~~
fs/f2fs/f2fs.h:2945:25: note: in expansion of macro 'test_opt'
2945 | test_opt(sbi, RESERVE_NODE));
| ^~~~~~~~
>> include/vdso/bits.h:7:40: warning: left shift count >= width of type [-Wshift-count-overflow]
7 | #define BIT(nr) (UL(1) << (nr))
| ^~
fs/f2fs/f2fs.h:150:33: note: in expansion of macro 'BIT'
150 | (F2FS_OPTION(sbi).opt & BIT(F2FS_MOUNT_##option))
| ^~~
fs/f2fs/f2fs.h:2953:13: note: in expansion of macro 'test_opt'
2953 | if (test_opt(sbi, RESERVE_NODE) &&
| ^~~~~~~~
fs/f2fs/super.c: In function 'limit_reserve_root':
>> include/vdso/bits.h:7:40: warning: left shift count >= width of type [-Wshift-count-overflow]
7 | #define BIT(nr) (UL(1) << (nr))
| ^~
fs/f2fs/f2fs.h:150:33: note: in expansion of macro 'BIT'
150 | (F2FS_OPTION(sbi).opt & BIT(F2FS_MOUNT_##option))
| ^~~
fs/f2fs/super.c:520:13: note: in expansion of macro 'test_opt'
520 | if (test_opt(sbi, RESERVE_NODE) &&
| ^~~~~~~~
>> include/vdso/bits.h:7:40: warning: left shift count >= width of type [-Wshift-count-overflow]
7 | #define BIT(nr) (UL(1) << (nr))
| ^~
fs/f2fs/f2fs.h:150:33: note: in expansion of macro 'BIT'
150 | (F2FS_OPTION(sbi).opt & BIT(F2FS_MOUNT_##option))
| ^~~
fs/f2fs/super.c:526:46: note: in expansion of macro 'test_opt'
526 | if (!test_opt(sbi, RESERVE_ROOT) && !test_opt(sbi, RESERVE_NODE) &&
| ^~~~~~~~
fs/f2fs/super.c: In function 'f2fs_check_opt_consistency':
>> include/vdso/bits.h:7:40: warning: left shift count >= width of type [-Wshift-count-overflow]
7 | #define BIT(nr) (UL(1) << (nr))
| ^~
fs/f2fs/f2fs.h:150:33: note: in expansion of macro 'BIT'
150 | (F2FS_OPTION(sbi).opt & BIT(F2FS_MOUNT_##option))
| ^~~
fs/f2fs/super.c:1528:13: note: in expansion of macro 'test_opt'
1528 | if (test_opt(sbi, RESERVE_NODE) &&
| ^~~~~~~~
>> include/vdso/bits.h:7:40: warning: left shift count >= width of type [-Wshift-count-overflow]
7 | #define BIT(nr) (UL(1) << (nr))
| ^~
fs/f2fs/super.c:1529:42: note: in expansion of macro 'BIT'
1529 | (ctx->opt_mask & BIT(F2FS_MOUNT_RESERVE_NODE)) &&
| ^~~
>> include/vdso/bits.h:7:40: warning: left shift count >= width of type [-Wshift-count-overflow]
7 | #define BIT(nr) (UL(1) << (nr))
| ^~
fs/f2fs/super.c:1534:35: note: in expansion of macro 'BIT'
1534 | ctx->opt_mask &= ~BIT(F2FS_MOUNT_RESERVE_NODE);
| ^~~
fs/f2fs/super.c: In function 'f2fs_show_options':
>> include/vdso/bits.h:7:40: warning: left shift count >= width of type [-Wshift-count-overflow]
7 | #define BIT(nr) (UL(1) << (nr))
| ^~
fs/f2fs/f2fs.h:150:33: note: in expansion of macro 'BIT'
150 | (F2FS_OPTION(sbi).opt & BIT(F2FS_MOUNT_##option))
| ^~~
fs/f2fs/super.c:2475:44: note: in expansion of macro 'test_opt'
2475 | if (test_opt(sbi, RESERVE_ROOT) || test_opt(sbi, RESERVE_NODE))
| ^~~~~~~~
vim +7 include/vdso/bits.h
3945ff37d2f48d Vincenzo Frascino 2020-03-20 6
3945ff37d2f48d Vincenzo Frascino 2020-03-20 @7 #define BIT(nr) (UL(1) << (nr))
cbdb1f163af2bb Andy Shevchenko 2022-11-28 8 #define BIT_ULL(nr) (ULL(1) << (nr))
3945ff37d2f48d Vincenzo Frascino 2020-03-20 9
--
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