tree: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git timers/urgent head: 75f62a4c59d4fce751f8ee71f87955943fd69b74 commit: 64dac5c9e0f5a933e4520f0cb689b7b143925207 [2/4] ktime: Get rid of the union config: blackfin-BF561-EZKIT-SMP_defconfig (attached as .config) compiler: bfin-uclinux-gcc (GCC) 6.2.0 reproduce: wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 64dac5c9e0f5a933e4520f0cb689b7b143925207 # save the attached .config to linux build tree make.cross ARCH=blackfin
Note: it may well be a FALSE warning. FWIW you are at least aware of it now. http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings All warnings (new ones prefixed by >>): kernel/time/tick-common.c: In function 'tick_setup_device': >> kernel/time/tick-common.c:233:3: warning: 'next_event' may be used >> uninitialized in this function [-Wmaybe-uninitialized] tick_setup_oneshot(newdev, handler, next_event); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ vim +/next_event +233 kernel/time/tick-common.c 320ab2b0b Rusty Russell 2008-12-13 217 if (!cpumask_equal(newdev->cpumask, cpumask)) 0de26520c Rusty Russell 2008-12-13 218 irq_set_affinity(newdev->irq, cpumask); 906568c9c Thomas Gleixner 2007-02-16 219 f8381cba0 Thomas Gleixner 2007-02-16 220 /* f8381cba0 Thomas Gleixner 2007-02-16 221 * When global broadcasting is active, check if the current f8381cba0 Thomas Gleixner 2007-02-16 222 * device is registered as a placeholder for broadcast mode. f8381cba0 Thomas Gleixner 2007-02-16 223 * This allows us to handle this x86 misfeature in a generic 07bd11729 Thomas Gleixner 2013-07-01 224 * way. This function also returns !=0 when we keep the 07bd11729 Thomas Gleixner 2013-07-01 225 * current active broadcast state for this CPU. f8381cba0 Thomas Gleixner 2007-02-16 226 */ f8381cba0 Thomas Gleixner 2007-02-16 227 if (tick_device_uses_broadcast(newdev, cpu)) f8381cba0 Thomas Gleixner 2007-02-16 228 return; f8381cba0 Thomas Gleixner 2007-02-16 229 906568c9c Thomas Gleixner 2007-02-16 230 if (td->mode == TICKDEV_MODE_PERIODIC) 906568c9c Thomas Gleixner 2007-02-16 231 tick_setup_periodic(newdev, 0); 79bf2bb33 Thomas Gleixner 2007-02-16 232 else 79bf2bb33 Thomas Gleixner 2007-02-16 @233 tick_setup_oneshot(newdev, handler, next_event); 906568c9c Thomas Gleixner 2007-02-16 234 } 906568c9c Thomas Gleixner 2007-02-16 235 03e13cf5e Thomas Gleixner 2013-04-25 236 void tick_install_replacement(struct clock_event_device *newdev) 03e13cf5e Thomas Gleixner 2013-04-25 237 { 22127e93c Christoph Lameter 2014-08-17 238 struct tick_device *td = this_cpu_ptr(&tick_cpu_device); 03e13cf5e Thomas Gleixner 2013-04-25 239 int cpu = smp_processor_id(); 03e13cf5e Thomas Gleixner 2013-04-25 240 03e13cf5e Thomas Gleixner 2013-04-25 241 clockevents_exchange_device(td->evtdev, newdev); :::::: The code at line 233 was first introduced by commit :::::: 79bf2bb335b85db25d27421c798595a2fa2a0e82 [PATCH] tick-management: dyntick / highres functionality :::::: TO: Thomas Gleixner <[email protected]> :::::: CC: Linus Torvalds <[email protected]> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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