Re: [PATCH] btrfs: check if root is readonly when setting posix acl

Hi Sun,

kernel test robot noticed the following build errors:

[auto build test ERROR on linus/master]
[also build test ERROR on v7.2-rc6]
[cannot apply to kdave/for-next next-20260807]
[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/Sun-YangKai/btrfs-check-if-root-is-readonly-when-setting-posix-acl/20260807-183739
base:   linus/master
patch link:    https://lore.kernel.org/r/20260709071529.4033-1-sunk67188%40gmail.com
patch subject: [PATCH] btrfs: check if root is readonly when setting posix acl
config: x86_64-kexec (https://download.01.org/0day-ci/archive/20260809/[email protected]/config)
compiler: clang version 22.1.3 (https://github.com/llvm/llvm-project e9846648fd6183ee6d8cbdb4502213fcf902a211)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260809/[email protected]/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 <[email protected]>
| Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/

All errors (new ones prefixed by >>):

>> fs/btrfs/acl.c:110:26: error: call to undeclared function 'BTRFS_I'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     110 |         if (btrfs_root_readonly(BTRFS_I(inode)->root))
         |                                 ^
>> fs/btrfs/acl.c:110:42: error: member reference type 'int' is not a pointer
     110 |         if (btrfs_root_readonly(BTRFS_I(inode)->root))
         |                                 ~~~~~~~~~~~~~~  ^
   2 errors generated.


vim +/BTRFS_I +110 fs/btrfs/acl.c

   102	
   103	int btrfs_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
   104			  struct posix_acl *acl, int type)
   105	{
   106		int ret;
   107		struct inode *inode = d_inode(dentry);
   108		umode_t old_mode = inode->i_mode;
   109	
 > 110		if (btrfs_root_readonly(BTRFS_I(inode)->root))

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