tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core.git driver-core-testing head: 3bd418f13312393093d17a312ec0033395d6892e commit: 055cd38ba6715e5affe753600b907acccfc85b7e [21/31] debugfs: prevent access to possibly dead file_operations at file open reproduce: make htmldocs
All warnings (new ones prefixed by >>):
>> fs/debugfs/file.c:71: warning: No description found for parameter 'dentry'
>> fs/debugfs/file.c:71: warning: Excess function parameter 'file' description
>> in 'debugfs_use_file_start'
include/linux/jbd2.h:439: warning: No description found for parameter
'i_transaction'
include/linux/jbd2.h:439: warning: No description found for parameter
'i_next_transaction'
include/linux/jbd2.h:439: warning: No description found for parameter
'i_list'
include/linux/jbd2.h:439: warning: No description found for parameter
'i_vfs_inode'
include/linux/jbd2.h:439: warning: No description found for parameter
'i_flags'
include/linux/jbd2.h:495: warning: No description found for parameter
'h_rsv_handle'
include/linux/jbd2.h:495: warning: No description found for parameter
'h_reserved'
include/linux/jbd2.h:495: warning: No description found for parameter
'h_type'
include/linux/jbd2.h:495: warning: No description found for parameter
'h_line_no'
include/linux/jbd2.h:495: warning: No description found for parameter
'h_start_jiffies'
include/linux/jbd2.h:495: warning: No description found for parameter
'h_requested_credits'
include/linux/jbd2.h:495: warning: No description found for parameter
'h_lockdep_map'
include/linux/jbd2.h:1038: warning: No description found for parameter
'j_chkpt_bhs[JBD2_NR_BATCH]'
include/linux/jbd2.h:1038: warning: No description found for parameter
'j_devname[BDEVNAME_SIZE+24]'
include/linux/jbd2.h:1038: warning: No description found for parameter
'j_average_commit_time'
include/linux/jbd2.h:1038: warning: No description found for parameter
'j_min_batch_time'
include/linux/jbd2.h:1038: warning: No description found for parameter
'j_max_batch_time'
include/linux/jbd2.h:1038: warning: No description found for parameter
'j_commit_callback'
include/linux/jbd2.h:1038: warning: No description found for parameter
'j_failed_commit'
include/linux/jbd2.h:1038: warning: No description found for parameter
'j_chksum_driver'
include/linux/jbd2.h:1038: warning: No description found for parameter
'j_csum_seed'
include/linux/jbd2.h:1038: warning: Excess struct/union/enum/typedef member
'j_history' description in 'journal_s'
include/linux/jbd2.h:1038: warning: Excess struct/union/enum/typedef member
'j_history_max' description in 'journal_s'
include/linux/jbd2.h:1038: warning: Excess struct/union/enum/typedef member
'j_history_cur' description in 'journal_s'
fs/jbd2/transaction.c:429: warning: No description found for parameter
'rsv_blocks'
fs/jbd2/transaction.c:429: warning: No description found for parameter
'gfp_mask'
fs/jbd2/transaction.c:429: warning: No description found for parameter 'type'
fs/jbd2/transaction.c:429: warning: No description found for parameter
'line_no'
fs/jbd2/transaction.c:505: warning: No description found for parameter 'type'
fs/jbd2/transaction.c:505: warning: No description found for parameter
'line_no'
fs/jbd2/transaction.c:635: warning: No description found for parameter
'gfp_mask'
vim +/dentry +71 fs/debugfs/file.c
55 * and debugfs_remove_recursive() will block. Since associated private
56 * file data may only get freed after a successful return of any of
57 * the removal functions, you may safely access it after a successful
58 * call to debugfs_use_file_start() without worrying about
59 * lifetime issues.
60 *
61 * If -%EIO is returned, the file has already been removed and thus,
62 * it is not safe to access any of its data. If, on the other hand,
63 * it is allowed to access the file data, zero is returned.
64 *
65 * Regardless of the return code, any call to
66 * debugfs_use_file_start() must be followed by a matching call
67 * to debugfs_use_file_finish().
68 */
69 static int debugfs_use_file_start(const struct dentry *dentry, int
*srcu_idx)
70 __acquires(&debugfs_srcu)
> 71 {
72 *srcu_idx = srcu_read_lock(&debugfs_srcu);
73 barrier();
74 if (d_unlinked(dentry))
75 return -EIO;
76 return 0;
77 }
78
79 /**
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