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 /** --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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