Re: [PATCH 1/2] bcachefs: do not use PF_MEMALLOC_NORECLAIM

[kernel test robot <lkp@intel.com>]

Hi Michal,

kernel test robot noticed the following build errors:

[auto build test ERROR on akpm-mm/mm-everything]
[also build test ERROR on tip/sched/core brauner-vfs/vfs.all linus/master v6.11-rc5]
[cannot apply to next-20240826]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Michal-Hocko/bcachefs-do-not-use-PF_MEMALLOC_NORECLAIM/20240826-171013
base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
patch link:    https://lore.kernel.org/r/20240826085347.1152675-2-mhocko%40kernel.org
patch subject: [PATCH 1/2] bcachefs: do not use PF_MEMALLOC_NORECLAIM
config: arc-randconfig-001-20240827 (https://download.01.org/0day-ci/archive/20240827/202408270304.AUPHM0xo-lkp@intel.com/config)
compiler: arc-elf-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240827/202408270304.AUPHM0xo-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/202408270304.AUPHM0xo-lkp@intel.com/

All errors (new ones prefixed by >>):

   fs/bcachefs/fs.c: In function '__bch2_new_inode':
>> fs/bcachefs/fs.c:248:70: error: macro "unlikely" passed 2 arguments, but takes just 1
     248 |         if (unlikely(inode_init_always_gfp(c->vfs_sb, &inode->v), gfp)) {
         |                                                                      ^
   In file included from include/linux/build_bug.h:5,
                    from include/linux/container_of.h:5,
                    from include/linux/list.h:5,
                    from include/linux/backing-dev-defs.h:5,
                    from fs/bcachefs/bcachefs.h:186,
                    from fs/bcachefs/fs.c:4:
   include/linux/compiler.h:77: note: macro "unlikely" defined here
      77 | # define unlikely(x)    __builtin_expect(!!(x), 0)
         | 
>> fs/bcachefs/fs.c:248:13: error: 'unlikely' undeclared (first use in this function)
     248 |         if (unlikely(inode_init_always_gfp(c->vfs_sb, &inode->v), gfp)) {
         |             ^~~~~~~~
   fs/bcachefs/fs.c:248:13: note: each undeclared identifier is reported only once for each function it appears in
   fs/bcachefs/fs.c: In function 'bch2_new_inode':
>> fs/bcachefs/fs.c:261:67: error: 'GFP_NOWARN' undeclared (first use in this function); did you mean 'GFP_NOWAIT'?
     261 |         struct bch_inode_info *inode = __bch2_new_inode(trans->c, GFP_NOWARN | GFP_NOWAIT);
         |                                                                   ^~~~~~~~~~
         |                                                                   GFP_NOWAIT


vim +/unlikely +248 fs/bcachefs/fs.c

   233	
   234	static struct bch_inode_info *__bch2_new_inode(struct bch_fs *c, gfp_t gfp)
   235	{
   236		struct bch_inode_info *inode = kmem_cache_alloc(bch2_inode_cache, gfp);
   237		if (!inode)
   238			return NULL;
   239	
   240		inode_init_once(&inode->v);
   241		mutex_init(&inode->ei_update_lock);
   242		two_state_lock_init(&inode->ei_pagecache_lock);
   243		INIT_LIST_HEAD(&inode->ei_vfs_inode_list);
   244		inode->ei_flags = 0;
   245		mutex_init(&inode->ei_quota_lock);
   246		memset(&inode->ei_devs_need_flush, 0, sizeof(inode->ei_devs_need_flush));
   247	
 > 248		if (unlikely(inode_init_always_gfp(c->vfs_sb, &inode->v), gfp)) {
   249			kmem_cache_free(bch2_inode_cache, inode);
   250			return NULL;
   251		}
   252	
   253		return inode;
   254	}
   255	
   256	/*
   257	 * Allocate a new inode, dropping/retaking btree locks if necessary:
   258	 */
   259	static struct bch_inode_info *bch2_new_inode(struct btree_trans *trans)
   260	{
 > 261		struct bch_inode_info *inode = __bch2_new_inode(trans->c, GFP_NOWARN | GFP_NOWAIT);
   262	
   263		if (unlikely(!inode)) {
   264			int ret = drop_locks_do(trans, (inode = __bch2_new_inode(trans->c, GFP_NOFS)) ? 0 : -ENOMEM);
   265			if (ret && inode) {
   266				__destroy_inode(&inode->v);
   267				kmem_cache_free(bch2_inode_cache, inode);
   268			}
   269			if (ret)
   270				return ERR_PTR(ret);
   271		}
   272	
   273		return inode;
   274	}
   275	

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