Hi Michael, [auto build test WARNING on linus/master] [also build test WARNING on v4.10-rc7 next-20170209] [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/Michael-S-Tsirkin/jump_label-mark-__start-stop___jump_table-const/20170210-104623 config: x86_64-rhel (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=x86_64 All warnings (new ones prefixed by >>): kernel/jump_label.c: In function 'jump_label_init': >> kernel/jump_label.c:284:34: warning: initialization discards 'const' >> qualifier from pointer target type [-Wdiscarded-qualifiers] struct jump_entry *iter_start = __start___jump_table; ^~~~~~~~~~~~~~~~~~~~ kernel/jump_label.c:285:33: warning: initialization discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers] struct jump_entry *iter_stop = __stop___jump_table; ^~~~~~~~~~~~~~~~~~~ kernel/jump_label.c: In function 'jump_label_text_reserved': >> kernel/jump_label.c:549:39: warning: passing argument 1 of >> '__jump_label_text_reserved' discards 'const' qualifier from pointer target >> type [-Wdiscarded-qualifiers] int ret = __jump_label_text_reserved(__start___jump_table, ^~~~~~~~~~~~~~~~~~~~ kernel/jump_label.c:210:12: note: expected 'struct jump_entry *' but argument is of type 'const struct jump_entry *' static int __jump_label_text_reserved(struct jump_entry *iter_start, ^~~~~~~~~~~~~~~~~~~~~~~~~~ kernel/jump_label.c:550:4: warning: passing argument 2 of '__jump_label_text_reserved' discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers] __stop___jump_table, start, end); ^~~~~~~~~~~~~~~~~~~ kernel/jump_label.c:210:12: note: expected 'struct jump_entry *' but argument is of type 'const struct jump_entry *' static int __jump_label_text_reserved(struct jump_entry *iter_start, ^~~~~~~~~~~~~~~~~~~~~~~~~~ kernel/jump_label.c: In function 'jump_label_update': kernel/jump_label.c:563:28: warning: initialization discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers] struct jump_entry *stop = __stop___jump_table; ^~~~~~~~~~~~~~~~~~~ vim +/const +284 kernel/jump_label.c 706249c22 Peter Zijlstra 2015-07-24 268 struct jump_entry *entry, 706249c22 Peter Zijlstra 2015-07-24 269 struct jump_entry *stop) 706249c22 Peter Zijlstra 2015-07-24 270 { 706249c22 Peter Zijlstra 2015-07-24 271 for (; (entry < stop) && (jump_entry_key(entry) == key); entry++) { 706249c22 Peter Zijlstra 2015-07-24 272 /* 706249c22 Peter Zijlstra 2015-07-24 273 * entry->code set to 0 invalidates module init text sections 706249c22 Peter Zijlstra 2015-07-24 274 * kernel_text_address() verifies we are not in core kernel 706249c22 Peter Zijlstra 2015-07-24 275 * init code, see jump_label_invalidate_module_init(). 706249c22 Peter Zijlstra 2015-07-24 276 */ 706249c22 Peter Zijlstra 2015-07-24 277 if (entry->code && kernel_text_address(entry->code)) 706249c22 Peter Zijlstra 2015-07-24 278 arch_jump_label_transform(entry, jump_label_type(entry)); 706249c22 Peter Zijlstra 2015-07-24 279 } 706249c22 Peter Zijlstra 2015-07-24 280 } 706249c22 Peter Zijlstra 2015-07-24 281 97ce2c88f Jeremy Fitzhardinge 2011-10-12 282 void __init jump_label_init(void) bf5438fca Jason Baron 2010-09-17 283 { bf5438fca Jason Baron 2010-09-17 @284 struct jump_entry *iter_start = __start___jump_table; bf5438fca Jason Baron 2010-09-17 285 struct jump_entry *iter_stop = __stop___jump_table; c5905afb0 Ingo Molnar 2012-02-24 286 struct static_key *key = NULL; bf5438fca Jason Baron 2010-09-17 287 struct jump_entry *iter; bf5438fca Jason Baron 2010-09-17 288 1f69bf9c6 Jason Baron 2016-08-03 289 /* 1f69bf9c6 Jason Baron 2016-08-03 290 * Since we are initializing the static_key.enabled field with 1f69bf9c6 Jason Baron 2016-08-03 291 * with the 'raw' int values (to avoid pulling in atomic.h) in 1f69bf9c6 Jason Baron 2016-08-03 292 * jump_label.h, let's make sure that is safe. There are only two :::::: The code at line 284 was first introduced by commit :::::: bf5438fca2950b03c21ad868090cc1a8fcd49536 jump label: Base patch for jump label :::::: TO: Jason Baron <[email protected]> :::::: CC: Steven Rostedt <[email protected]> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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