Hi Matthew, I love your patch! Perhaps something to improve:
[auto build test WARNING on linus/master] [also build test WARNING on v4.14-rc6 next-20171018] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Matthew-Wilcox/Check-all-c-files-for-bad-kernel-doc-comments/20171030-033926 config: i386-tinyconfig (attached as .config) compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901 reproduce: # save the attached .config to linux build tree make ARCH=i386 All warnings (new ones prefixed by >>): >> fs//attr.c:114: warning: Excess function parameter 'Returns' description in >> 'inode_newsize_ok' >> fs//attr.c:205: warning: No description found for parameter 'attr' >> fs//attr.c:205: warning: Excess function parameter 'iattr' description in >> 'notify_change' -- >> arch/x86/kernel/i8259.c:234: warning: No description found for parameter >> 'trigger' -- >> arch/x86/kernel/tsc.c:1163: warning: No description found for parameter >> 'work' -- >> arch/x86/mm/pgtable.c:558: warning: No description found for parameter >> 'reserve' >> arch/x86/mm/pgtable.c:595: warning: No description found for parameter 'p4d' >> arch/x86/mm/pgtable.c:595: warning: No description found for parameter 'addr' >> arch/x86/mm/pgtable.c:595: warning: No description found for parameter 'prot' arch/x86/mm/pgtable.c:605: warning: No description found for parameter 'p4d' >> arch/x86/mm/pgtable.c:629: warning: No description found for parameter 'pud' arch/x86/mm/pgtable.c:629: warning: No description found for parameter 'addr' arch/x86/mm/pgtable.c:629: warning: No description found for parameter 'prot' >> arch/x86/mm/pgtable.c:654: warning: No description found for parameter 'pmd' arch/x86/mm/pgtable.c:654: warning: No description found for parameter 'addr' arch/x86/mm/pgtable.c:654: warning: No description found for parameter 'prot' arch/x86/mm/pgtable.c:680: warning: No description found for parameter 'pud' arch/x86/mm/pgtable.c:695: warning: No description found for parameter 'pmd' -- >> arch/x86/events/intel/pt.c:1064: warning: No description found for parameter >> 'nr_pages' >> arch/x86/events/intel/pt.c:1064: warning: Excess function parameter 'size' >> description in 'pt_buffer_init_topa' -- >> drivers/base/attribute_container.c:255: warning: No description found for >> parameter 'fn' >> drivers/base/attribute_container.c:369: warning: No description found for >> parameter 'cont' >> drivers/base/attribute_container.c:369: warning: No description found for >> parameter 'dev' >> drivers/base/attribute_container.c:369: warning: No description found for >> parameter 'classdev' -- >> kernel//events/core.c:133: warning: No description found for parameter 'cpu' >> kernel//events/core.c:9911: warning: No description found for parameter >> 'flags' >> kernel//events/core.c:10350: warning: No description found for parameter >> 'overflow_handler' >> kernel//events/core.c:10350: warning: No description found for parameter >> 'context' -- >> kernel//events/hw_breakpoint.c:420: warning: No description found for >> parameter 'context' >> kernel//events/hw_breakpoint.c:434: warning: Excess function parameter >> 'triggered' description in 'modify_user_hw_breakpoint' >> kernel//events/hw_breakpoint.c:434: warning: Excess function parameter 'tsk' >> description in 'modify_user_hw_breakpoint' kernel//events/hw_breakpoint.c:502: warning: No description found for parameter 'context' -- >> kernel//irq/devres.c:103: warning: Excess function parameter 'thread_fn' >> description in 'devm_request_any_context_irq' -- >> kernel//power/qos.c:476: warning: No description found for parameter >> 'new_value' >> kernel//power/qos.c:476: warning: Excess function parameter 'value' >> description in 'pm_qos_update_request' -- >> kernel//time/timekeeping.c:370: warning: No description found for parameter >> 'tkf' kernel//time/timekeeping.c:419: warning: No description found for parameter 'tkf' >> kernel//time/timekeeping.c:568: warning: No description found for parameter >> 'nb' kernel//time/timekeeping.c:587: warning: No description found for parameter 'nb' >> kernel//time/timekeeping.c:680: warning: No description found for parameter >> 'tk' >> kernel//time/timekeeping.c:1268: warning: No description found for parameter >> 'ts' >> kernel//time/timekeeping.c:1268: warning: Excess function parameter 'tv' >> description in 'timekeeping_inject_offset' kernel//time/timekeeping.c:1313: warning: No description found for parameter 'tk' >> kernel//time/timekeeping.c:1313: warning: No description found for parameter >> 'tai_offset' >> kernel//time/timekeeping.c:1324: warning: No description found for parameter >> 'data' kernel//time/timekeeping.c:1449: warning: No description found for parameter 'ts' kernel//time/timekeeping.c:1472: warning: No description found for parameter 'ts' kernel//time/timekeeping.c:1545: warning: No description found for parameter 'tk' kernel//time/timekeeping.c:1963: warning: No description found for parameter 'tk' kernel//time/timekeeping.c:2004: warning: No description found for parameter 'tk' >> kernel//time/timekeeping.c:2004: warning: No description found for parameter >> 'offset' >> kernel//time/timekeeping.c:2004: warning: No description found for parameter >> 'shift' >> kernel//time/timekeeping.c:2004: warning: No description found for parameter >> 'clock_set' >> kernel//time/timekeeping.c:2254: warning: No description found for parameter >> 'txc' >> kernel//time/timekeeping.c:2307: warning: No description found for parameter >> 'phase_ts' >> kernel//time/timekeeping.c:2307: warning: No description found for parameter >> 'raw_ts' .. vim +114 fs//attr.c ^1da177e4 Linus Torvalds 2005-04-16 97 25d9e2d15 npig...@suse.de 2009-08-21 98 /** 25d9e2d15 npig...@suse.de 2009-08-21 99 * inode_newsize_ok - may this inode be truncated to a given size 25d9e2d15 npig...@suse.de 2009-08-21 100 * @inode: the inode to be truncated 25d9e2d15 npig...@suse.de 2009-08-21 101 * @offset: the new size to assign to the inode 25d9e2d15 npig...@suse.de 2009-08-21 102 * @Returns: 0 on success, -ve errno on failure 25d9e2d15 npig...@suse.de 2009-08-21 103 * 7bb46a673 npig...@suse.de 2010-05-27 104 * inode_newsize_ok must be called with i_mutex held. 7bb46a673 npig...@suse.de 2010-05-27 105 * 25d9e2d15 npig...@suse.de 2009-08-21 106 * inode_newsize_ok will check filesystem limits and ulimits to check that the 25d9e2d15 npig...@suse.de 2009-08-21 107 * new inode size is within limits. inode_newsize_ok will also send SIGXFSZ 25d9e2d15 npig...@suse.de 2009-08-21 108 * when necessary. Caller must not proceed with inode size change if failure is 25d9e2d15 npig...@suse.de 2009-08-21 109 * returned. @inode must be a file (not directory), with appropriate 25d9e2d15 npig...@suse.de 2009-08-21 110 * permissions to allow truncate (inode_newsize_ok does NOT check these 25d9e2d15 npig...@suse.de 2009-08-21 111 * conditions). 25d9e2d15 npig...@suse.de 2009-08-21 112 */ 25d9e2d15 npig...@suse.de 2009-08-21 113 int inode_newsize_ok(const struct inode *inode, loff_t offset) 25d9e2d15 npig...@suse.de 2009-08-21 @114 { 25d9e2d15 npig...@suse.de 2009-08-21 115 if (inode->i_size < offset) { 25d9e2d15 npig...@suse.de 2009-08-21 116 unsigned long limit; 25d9e2d15 npig...@suse.de 2009-08-21 117 d554ed895 Jiri Slaby 2010-03-05 118 limit = rlimit(RLIMIT_FSIZE); 25d9e2d15 npig...@suse.de 2009-08-21 119 if (limit != RLIM_INFINITY && offset > limit) 25d9e2d15 npig...@suse.de 2009-08-21 120 goto out_sig; 25d9e2d15 npig...@suse.de 2009-08-21 121 if (offset > inode->i_sb->s_maxbytes) 25d9e2d15 npig...@suse.de 2009-08-21 122 goto out_big; 25d9e2d15 npig...@suse.de 2009-08-21 123 } else { 25d9e2d15 npig...@suse.de 2009-08-21 124 /* 25d9e2d15 npig...@suse.de 2009-08-21 125 * truncation of in-use swapfiles is disallowed - it would 25d9e2d15 npig...@suse.de 2009-08-21 126 * cause subsequent swapout to scribble on the now-freed 25d9e2d15 npig...@suse.de 2009-08-21 127 * blocks. 25d9e2d15 npig...@suse.de 2009-08-21 128 */ 25d9e2d15 npig...@suse.de 2009-08-21 129 if (IS_SWAPFILE(inode)) 25d9e2d15 npig...@suse.de 2009-08-21 130 return -ETXTBSY; 25d9e2d15 npig...@suse.de 2009-08-21 131 } 25d9e2d15 npig...@suse.de 2009-08-21 132 25d9e2d15 npig...@suse.de 2009-08-21 133 return 0; 25d9e2d15 npig...@suse.de 2009-08-21 134 out_sig: 25d9e2d15 npig...@suse.de 2009-08-21 135 send_sig(SIGXFSZ, current, 0); 25d9e2d15 npig...@suse.de 2009-08-21 136 out_big: 25d9e2d15 npig...@suse.de 2009-08-21 137 return -EFBIG; 25d9e2d15 npig...@suse.de 2009-08-21 138 } 25d9e2d15 npig...@suse.de 2009-08-21 139 EXPORT_SYMBOL(inode_newsize_ok); 25d9e2d15 npig...@suse.de 2009-08-21 140 7bb46a673 npig...@suse.de 2010-05-27 141 /** 6a1a90ad1 Christoph Hellwig 2010-06-04 142 * setattr_copy - copy simple metadata updates into the generic inode 7bb46a673 npig...@suse.de 2010-05-27 143 * @inode: the inode to be updated 7bb46a673 npig...@suse.de 2010-05-27 144 * @attr: the new attributes 7bb46a673 npig...@suse.de 2010-05-27 145 * 6a1a90ad1 Christoph Hellwig 2010-06-04 146 * setattr_copy must be called with i_mutex held. 7bb46a673 npig...@suse.de 2010-05-27 147 * 6a1a90ad1 Christoph Hellwig 2010-06-04 148 * setattr_copy updates the inode's metadata with that specified 25985edce Lucas De Marchi 2011-03-30 149 * in attr. Noticeably missing is inode size update, which is more complex 2c27c65ed Christoph Hellwig 2010-06-04 150 * as it requires pagecache updates. 7bb46a673 npig...@suse.de 2010-05-27 151 * 7bb46a673 npig...@suse.de 2010-05-27 152 * The inode is not marked as dirty after this operation. The rationale is 7bb46a673 npig...@suse.de 2010-05-27 153 * that for "simple" filesystems, the struct inode is the inode storage. 7bb46a673 npig...@suse.de 2010-05-27 154 * The caller is free to mark the inode dirty afterwards if needed. 7bb46a673 npig...@suse.de 2010-05-27 155 */ 6a1a90ad1 Christoph Hellwig 2010-06-04 156 void setattr_copy(struct inode *inode, const struct iattr *attr) ^1da177e4 Linus Torvalds 2005-04-16 157 { ^1da177e4 Linus Torvalds 2005-04-16 158 unsigned int ia_valid = attr->ia_valid; 4a30131e7 NeilBrown 2006-01-08 159 ^1da177e4 Linus Torvalds 2005-04-16 160 if (ia_valid & ATTR_UID) ^1da177e4 Linus Torvalds 2005-04-16 161 inode->i_uid = attr->ia_uid; ^1da177e4 Linus Torvalds 2005-04-16 162 if (ia_valid & ATTR_GID) ^1da177e4 Linus Torvalds 2005-04-16 163 inode->i_gid = attr->ia_gid; ^1da177e4 Linus Torvalds 2005-04-16 164 if (ia_valid & ATTR_ATIME) ^1da177e4 Linus Torvalds 2005-04-16 165 inode->i_atime = timespec_trunc(attr->ia_atime, ^1da177e4 Linus Torvalds 2005-04-16 166 inode->i_sb->s_time_gran); ^1da177e4 Linus Torvalds 2005-04-16 167 if (ia_valid & ATTR_MTIME) ^1da177e4 Linus Torvalds 2005-04-16 168 inode->i_mtime = timespec_trunc(attr->ia_mtime, ^1da177e4 Linus Torvalds 2005-04-16 169 inode->i_sb->s_time_gran); ^1da177e4 Linus Torvalds 2005-04-16 170 if (ia_valid & ATTR_CTIME) ^1da177e4 Linus Torvalds 2005-04-16 171 inode->i_ctime = timespec_trunc(attr->ia_ctime, ^1da177e4 Linus Torvalds 2005-04-16 172 inode->i_sb->s_time_gran); ^1da177e4 Linus Torvalds 2005-04-16 173 if (ia_valid & ATTR_MODE) { ^1da177e4 Linus Torvalds 2005-04-16 174 umode_t mode = attr->ia_mode; ^1da177e4 Linus Torvalds 2005-04-16 175 7fa294c89 Eric W. Biederman 2012-09-02 176 if (!in_group_p(inode->i_gid) && 23adbe12e Andy Lutomirski 2014-06-10 177 !capable_wrt_inode_uidgid(inode, CAP_FSETID)) ^1da177e4 Linus Torvalds 2005-04-16 178 mode &= ~S_ISGID; ^1da177e4 Linus Torvalds 2005-04-16 179 inode->i_mode = mode; ^1da177e4 Linus Torvalds 2005-04-16 180 } 7bb46a673 npig...@suse.de 2010-05-27 181 } 6a1a90ad1 Christoph Hellwig 2010-06-04 182 EXPORT_SYMBOL(setattr_copy); 7bb46a673 npig...@suse.de 2010-05-27 183 27ac0ffea J. Bruce Fields 2011-09-20 184 /** 27ac0ffea J. Bruce Fields 2011-09-20 185 * notify_change - modify attributes of a filesytem object 27ac0ffea J. Bruce Fields 2011-09-20 186 * @dentry: object affected 27ac0ffea J. Bruce Fields 2011-09-20 187 * @iattr: new attributes 27ac0ffea J. Bruce Fields 2011-09-20 188 * @delegated_inode: returns inode, if the inode is delegated 27ac0ffea J. Bruce Fields 2011-09-20 189 * 27ac0ffea J. Bruce Fields 2011-09-20 190 * The caller must hold the i_mutex on the affected object. 27ac0ffea J. Bruce Fields 2011-09-20 191 * 27ac0ffea J. Bruce Fields 2011-09-20 192 * If notify_change discovers a delegation in need of breaking, 27ac0ffea J. Bruce Fields 2011-09-20 193 * it will return -EWOULDBLOCK and return a reference to the inode in 27ac0ffea J. Bruce Fields 2011-09-20 194 * delegated_inode. The caller should then break the delegation and 27ac0ffea J. Bruce Fields 2011-09-20 195 * retry. Because breaking a delegation may take a long time, the 27ac0ffea J. Bruce Fields 2011-09-20 196 * caller should drop the i_mutex before doing so. 27ac0ffea J. Bruce Fields 2011-09-20 197 * 27ac0ffea J. Bruce Fields 2011-09-20 198 * Alternatively, a caller may pass NULL for delegated_inode. This may 27ac0ffea J. Bruce Fields 2011-09-20 199 * be appropriate for callers that expect the underlying filesystem not 27ac0ffea J. Bruce Fields 2011-09-20 200 * to be NFS exported. Also, passing NULL is fine for callers holding 27ac0ffea J. Bruce Fields 2011-09-20 201 * the file open for write, as there can be no conflicting delegation in 27ac0ffea J. Bruce Fields 2011-09-20 202 * that case. 27ac0ffea J. Bruce Fields 2011-09-20 203 */ 27ac0ffea J. Bruce Fields 2011-09-20 204 int notify_change(struct dentry * dentry, struct iattr * attr, struct inode **delegated_inode) ^1da177e4 Linus Torvalds 2005-04-16 @205 { :::::: The code at line 114 was first introduced by commit :::::: 25d9e2d15286281ec834b829a4aaf8969011f1cd truncate: new helpers :::::: TO: npig...@suse.de <npig...@suse.de> :::::: CC: al <a...@dizzy.pdmi.ras.ru> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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