From: kernel test robot <lkp@intel.com>
To: Christian Brauner <brauner@kernel.org>
Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev,
Christian Brauner <christianvanbrauner@gmail.com>
Subject: [brauner-github:vfs.all 10/11] fs/super.c:392:5: error: no member named 's_min_writeback_pages' in 'struct super_block'
Date: Wed, 5 Nov 2025 18:47:42 +0800 [thread overview]
Message-ID: <202511051853.jM0A4ftr-lkp@intel.com> (raw)
tree: https://github.com/brauner/linux.git vfs.all
head: 0b843ef6ec4fae983bb106b2bfaae0481831d4be
commit: 3a8d78a1d066e50eadac1ac7ca8284a9867b8d8e [10/11] Merge branch 'vfs-6.19.fs_header' into vfs.all
config: arm-allnoconfig (https://download.01.org/0day-ci/archive/20251105/202511051853.jM0A4ftr-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project d2625a438020ad35330cda29c3def102c1687b1b)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251105/202511051853.jM0A4ftr-lkp@intel.com/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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202511051853.jM0A4ftr-lkp@intel.com/
All errors (new ones prefixed by >>):
>> fs/super.c:392:5: error: no member named 's_min_writeback_pages' in 'struct super_block'
392 | s->s_min_writeback_pages = MIN_WRITEBACK_PAGES;
| ~ ^
1 error generated.
--
>> fs/fs-writeback.c:1915:32: error: no member named 's_min_writeback_pages' in 'struct super_block'
1915 | return round_down(pages + sb->s_min_writeback_pages,
| ~~ ^
>> fs/fs-writeback.c:1915:32: error: no member named 's_min_writeback_pages' in 'struct super_block'
1915 | return round_down(pages + sb->s_min_writeback_pages,
| ~~ ^
fs/fs-writeback.c:1916:8: error: no member named 's_min_writeback_pages' in 'struct super_block'
1916 | sb->s_min_writeback_pages);
| ~~ ^
3 errors generated.
vim +392 fs/super.c
5accdf82ba25ca Jan Kara 2012-06-12 306
^1da177e4c3f41 Linus Torvalds 2005-04-16 307 /**
^1da177e4c3f41 Linus Torvalds 2005-04-16 308 * alloc_super - create new superblock
fe2bbc4832659b Henrik Kretzschmar 2006-09-06 309 * @type: filesystem type superblock should belong to
9249e17fe094d8 David Howells 2012-06-25 310 * @flags: the mount flags
6e4eab577a0cae Eric W. Biederman 2016-05-24 311 * @user_ns: User namespace for the super_block
^1da177e4c3f41 Linus Torvalds 2005-04-16 312 *
^1da177e4c3f41 Linus Torvalds 2005-04-16 313 * Allocates and initializes a new &struct super_block. alloc_super()
^1da177e4c3f41 Linus Torvalds 2005-04-16 314 * returns a pointer new superblock or %NULL if allocation had failed.
^1da177e4c3f41 Linus Torvalds 2005-04-16 315 */
6e4eab577a0cae Eric W. Biederman 2016-05-24 316 static struct super_block *alloc_super(struct file_system_type *type, int flags,
6e4eab577a0cae Eric W. Biederman 2016-05-24 317 struct user_namespace *user_ns)
^1da177e4c3f41 Linus Torvalds 2005-04-16 318 {
2b46a19db0a176 Alexander Mikhalitsyn 2023-12-08 319 struct super_block *s = kzalloc(sizeof(struct super_block), GFP_KERNEL);
b87221de6a4934 Alexey Dobriyan 2009-09-21 320 static const struct super_operations default_op;
7eb5e8826911f2 Al Viro 2013-10-01 321 int i;
7eb5e8826911f2 Al Viro 2013-10-01 322
7eb5e8826911f2 Al Viro 2013-10-01 323 if (!s)
7eb5e8826911f2 Al Viro 2013-10-01 324 return NULL;
^1da177e4c3f41 Linus Torvalds 2005-04-16 325
6e4eab577a0cae Eric W. Biederman 2016-05-24 326 s->s_user_ns = get_user_ns(user_ns);
ca0168e8a77cf8 Al Viro 2017-12-05 327 init_rwsem(&s->s_umount);
ca0168e8a77cf8 Al Viro 2017-12-05 328 lockdep_set_class(&s->s_umount, &type->s_umount_key);
ca0168e8a77cf8 Al Viro 2017-12-05 329 /*
ca0168e8a77cf8 Al Viro 2017-12-05 330 * sget() can have s_umount recursion.
ca0168e8a77cf8 Al Viro 2017-12-05 331 *
ca0168e8a77cf8 Al Viro 2017-12-05 332 * When it cannot find a suitable sb, it allocates a new
ca0168e8a77cf8 Al Viro 2017-12-05 333 * one (this one), and tries again to find a suitable old
ca0168e8a77cf8 Al Viro 2017-12-05 334 * one.
ca0168e8a77cf8 Al Viro 2017-12-05 335 *
ca0168e8a77cf8 Al Viro 2017-12-05 336 * In case that succeeds, it will acquire the s_umount
ca0168e8a77cf8 Al Viro 2017-12-05 337 * lock of the old one. Since these are clearly distrinct
ca0168e8a77cf8 Al Viro 2017-12-05 338 * locks, and this object isn't exposed yet, there's no
ca0168e8a77cf8 Al Viro 2017-12-05 339 * risk of deadlocks.
ca0168e8a77cf8 Al Viro 2017-12-05 340 *
ca0168e8a77cf8 Al Viro 2017-12-05 341 * Annotate this by putting this lock in a different
ca0168e8a77cf8 Al Viro 2017-12-05 342 * subclass.
ca0168e8a77cf8 Al Viro 2017-12-05 343 */
ca0168e8a77cf8 Al Viro 2017-12-05 344 down_write_nested(&s->s_umount, SINGLE_DEPTH_NESTING);
b5bd856a0c2a63 Vladimir Davydov 2014-01-21 345
7b7a8665edd8db Christoph Hellwig 2013-09-04 346 if (security_sb_alloc(s))
7eb5e8826911f2 Al Viro 2013-10-01 347 goto fail;
7b7a8665edd8db Christoph Hellwig 2013-09-04 348
7eb5e8826911f2 Al Viro 2013-10-01 349 for (i = 0; i < SB_FREEZE_LEVELS; i++) {
8129ed29644bf5 Oleg Nesterov 2015-08-11 350 if (__percpu_init_rwsem(&s->s_writers.rw_sem[i],
8129ed29644bf5 Oleg Nesterov 2015-08-11 351 sb_writers_name[i],
8129ed29644bf5 Oleg Nesterov 2015-08-11 352 &type->s_writers_key[i]))
7eb5e8826911f2 Al Viro 2013-10-01 353 goto fail;
7eb5e8826911f2 Al Viro 2013-10-01 354 }
df0ce26cb4ee8b Christoph Hellwig 2015-01-14 355 s->s_bdi = &noop_backing_dev_info;
9249e17fe094d8 David Howells 2012-06-25 356 s->s_flags = flags;
cc50a07a247e17 Eric W. Biederman 2016-06-09 357 if (s->s_user_ns != &init_user_ns)
67690f937c38bb Eric W. Biederman 2016-05-18 358 s->s_iflags |= SB_I_NODEV;
a5166169f9b920 Al Viro 2011-12-12 359 INIT_HLIST_NODE(&s->s_instances);
f1ee616214cb22 NeilBrown 2017-12-21 360 INIT_HLIST_BL_HEAD(&s->s_roots);
e97fedb9ef9868 Dave Chinner 2015-03-04 361 mutex_init(&s->s_sync_lock);
^1da177e4c3f41 Linus Torvalds 2005-04-16 362 INIT_LIST_HEAD(&s->s_inodes);
74278da9f70d84 Dave Chinner 2015-03-04 363 spin_lock_init(&s->s_inode_list_lock);
6c60d2b5746cf2 Dave Chinner 2016-07-26 364 INIT_LIST_HEAD(&s->s_inodes_wb);
6c60d2b5746cf2 Dave Chinner 2016-07-26 365 spin_lock_init(&s->s_inode_wblist_lock);
5ca302c8e502ca Glauber Costa 2013-08-28 366
b20bd1a5e78af2 Al Viro 2010-03-22 367 s->s_count = 1;
^1da177e4c3f41 Linus Torvalds 2005-04-16 368 atomic_set(&s->s_active, 1);
a11f3a0574a573 Arjan van de Ven 2006-03-23 369 mutex_init(&s->s_vfs_rename_mutex);
51ee049e771c14 Roland Dreier 2010-04-27 370 lockdep_set_class(&s->s_vfs_rename_mutex, &type->s_vfs_rename_key);
bc8230ee8e2ba9 Jan Kara 2017-06-08 371 init_rwsem(&s->s_dquot.dqio_sem);
^1da177e4c3f41 Linus Torvalds 2005-04-16 372 s->s_maxbytes = MAX_NON_LFS;
^1da177e4c3f41 Linus Torvalds 2005-04-16 373 s->s_op = &default_op;
^1da177e4c3f41 Linus Torvalds 2005-04-16 374 s->s_time_gran = 1000000000;
188d20bcd1ebd8 Deepa Dinamani 2018-01-21 375 s->s_time_min = TIME64_MIN;
188d20bcd1ebd8 Deepa Dinamani 2018-01-21 376 s->s_time_max = TIME64_MAX;
b0d40c92adafde Dave Chinner 2011-07-08 377
1720f5dd8d3af3 Qi Zheng 2023-09-11 378 s->s_shrink = shrinker_alloc(SHRINKER_NUMA_AWARE | SHRINKER_MEMCG_AWARE,
1720f5dd8d3af3 Qi Zheng 2023-09-11 379 "sb-%s", type->name);
1720f5dd8d3af3 Qi Zheng 2023-09-11 380 if (!s->s_shrink)
8e04944f0ea8b8 Tetsuo Handa 2018-04-04 381 goto fail;
1720f5dd8d3af3 Qi Zheng 2023-09-11 382
1720f5dd8d3af3 Qi Zheng 2023-09-11 383 s->s_shrink->scan_objects = super_cache_scan;
1720f5dd8d3af3 Qi Zheng 2023-09-11 384 s->s_shrink->count_objects = super_cache_count;
1720f5dd8d3af3 Qi Zheng 2023-09-11 385 s->s_shrink->batch = 1024;
1720f5dd8d3af3 Qi Zheng 2023-09-11 386 s->s_shrink->private_data = s;
1720f5dd8d3af3 Qi Zheng 2023-09-11 387
1720f5dd8d3af3 Qi Zheng 2023-09-11 388 if (list_lru_init_memcg(&s->s_dentry_lru, s->s_shrink))
2b3648a6ff83bd Kirill Tkhai 2018-08-17 389 goto fail;
1720f5dd8d3af3 Qi Zheng 2023-09-11 390 if (list_lru_init_memcg(&s->s_inode_lru, s->s_shrink))
2b3648a6ff83bd Kirill Tkhai 2018-08-17 391 goto fail;
90db4d4441f58d Christoph Hellwig 2025-10-17 @392 s->s_min_writeback_pages = MIN_WRITEBACK_PAGES;
^1da177e4c3f41 Linus Torvalds 2005-04-16 393 return s;
5ca302c8e502ca Glauber Costa 2013-08-28 394
7eb5e8826911f2 Al Viro 2013-10-01 395 fail:
0200894d11551a Al Viro 2017-10-11 396 destroy_unused_super(s);
7eb5e8826911f2 Al Viro 2013-10-01 397 return NULL;
^1da177e4c3f41 Linus Torvalds 2005-04-16 398 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 399
:::::: The code at line 392 was first introduced by commit
:::::: 90db4d4441f58d433ecf74f7e3bd17e0a553c20c writeback: allow the file system to override MIN_WRITEBACK_PAGES
:::::: TO: Christoph Hellwig <hch@lst.de>
:::::: CC: Christian Brauner <brauner@kernel.org>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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