* Re: [PATCH v3] tracefs: Add read-only eventfs filesystem at /sys/kernel/events
[not found] <20260810160708.3460a2fd@gandalf.local.home>
@ 2026-08-20 11:25 ` kernel test robot
2026-08-20 16:32 ` Li, Philip
0 siblings, 1 reply; 2+ messages in thread
From: kernel test robot @ 2026-08-20 11:25 UTC (permalink / raw)
To: Steven Rostedt, LKML, Linux Trace Kernel
Cc: llvm, oe-kbuild-all, Anubhav Shelat, Masami Hiramatsu,
Shivank Garg, Ackerley Tng, Fuad Tabba, Christian Brauner,
Sean Christopherson
Hi Steven,
kernel test robot noticed the following build errors:
[auto build test ERROR on v7.2]
[also build test ERROR on next-20260819]
[cannot apply to trace/for-next linus/master]
[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/Steven-Rostedt/tracefs-Add-read-only-eventfs-filesystem-at-sys-kernel-events/20260810-160708
base: v7.2
patch link: https://lore.kernel.org/r/20260810160708.3460a2fd%40gandalf.local.home
patch subject: [PATCH v3] tracefs: Add read-only eventfs filesystem at /sys/kernel/events
config: x86_64-kexec (https://download.01.org/0day-ci/archive/20260820/202608201957.NHoAQjoy-lkp@intel.com/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/20260820/202608201957.NHoAQjoy-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/202608201957.NHoAQjoy-lkp@intel.com/
All errors (new ones prefixed by >>):
>> fs/tracefs/event_inode.c:38:16: error: use of undeclared identifier 'EVENTFS_SUPER_MAGIC'
38 | sb->s_magic = EVENTFS_SUPER_MAGIC;
| ^~~~~~~~~~~~~~~~~~~
1 error generated.
vim +/EVENTFS_SUPER_MAGIC +38 fs/tracefs/event_inode.c
30
31 static int eventfs_ro_fill_super(struct super_block *sb, struct fs_context *fc)
32 {
33 struct inode *inode;
34 struct dentry *root;
35
36 sb->s_blocksize = PAGE_SIZE;
37 sb->s_blocksize_bits = PAGE_SHIFT;
> 38 sb->s_magic = EVENTFS_SUPER_MAGIC;
39 sb->s_op = &eventfs_ro_super_operations;
40 sb->s_time_gran = 1;
41 sb->s_flags |= SB_RDONLY;
42
43 inode = new_inode(sb);
44 if (!inode)
45 return -ENOMEM;
46
47 inode->i_ino = 1;
48 inode->i_mode = S_IFDIR | 0555;
49 simple_inode_init_ts(inode);
50 inode->i_op = &simple_dir_inode_operations;
51 inode->i_fop = &simple_dir_operations;
52 set_nlink(inode, 2);
53
54 set_default_d_op(sb, &tracefs_dentry_operations);
55
56 root = d_make_root(inode);
57 if (!root)
58 return -ENOMEM;
59
60 sb->s_root = root;
61
62 return 0;
63 }
64
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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