2:05 a.m.
tree: https://github.com/intel/linux-intel-lts.git 5.4/yocto
head: 5342fd3d769c58688aad5088b77b3c9f44438ef7
commit: e3b73159b8cfd2c940dd6e55702754c16f1f3923 [5/10] mfd: intel-ehl-gpio: Introduce MFD
framework to PSE GPIO/TGPIO
config: x86_64-randconfig-r026-20210514 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project
425781bce01f2f1d5f553d3b2bf9ebbd6e15068c)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O
~/bin/make.cross
chmod +x ~/bin/make.cross
# install x86_64 cross compiling tool for clang build
# apt-get install binutils-x86-64-linux-gnu
#
https://github.com/intel/linux-intel-lts/commit/e3b73159b8cfd2c940dd6e557...
git remote add intel-linux-intel-lts https://github.com/intel/linux-intel-lts.git
git fetch --no-tags intel-linux-intel-lts 5.4/yocto
git checkout e3b73159b8cfd2c940dd6e55702754c16f1f3923
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=x86_64
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com>
All warnings (new ones prefixed by >>):
> drivers/ptp/ptp-intel-tgpio-plat.c:234:6: warning: variable
'isgn' is used uninitialized whenever 'if' condition is false
[-Wsometimes-uninitialized]
if (scaled_ppm < 0) {
^~~~~~~~~~~~~~
drivers/ptp/ptp-intel-tgpio-plat.c:247:9: note: uninitialized use occurs here
reg |= isgn << 31;
^~~~
drivers/ptp/ptp-intel-tgpio-plat.c:234:2: note: remove the 'if' if its
condition is always true
if (scaled_ppm < 0) {
^~~~~~~~~~~~~~~~~~~~
drivers/ptp/ptp-intel-tgpio-plat.c:229:13: note: initialize the variable 'isgn'
to silence this warning
bool isgn;
^
= 0
1 warning generated.
vim +234 drivers/ptp/ptp-intel-tgpio-plat.c
223
224 static int intel_tgpio_adjfine(struct ptp_clock_info *info, long scaled_ppm)
225 {
226 struct intel_tgpio *tgpio = to_intel_tgpio(info);
227 unsigned long flags;
228 u32 reg;
229 bool isgn;
230
231 pm_runtime_get_sync(tgpio->dev->parent);
232
233 spin_lock_irqsave(&tgpio->lock, flags);
234 if (scaled_ppm < 0) {
235 isgn = true;
236 scaled_ppm = -scaled_ppm;
237 }
238
239 /*
240 * HW uses a 200MHz clock, meaning it has a 5ns period. Just
241 * multiply scaled_ppm by 5 to get our increment.
242 */
243 reg = 5 * scaled_ppm;
244
245 /* bit 31 is sign bit */
246 reg &= ~BIT(31);
247 reg |= isgn << 31;
248
249 intel_tgpio_writel(tgpio->base, TIMINCA_GLOBAL, reg);
250 spin_unlock_irqrestore(&tgpio->lock, flags);
251
252 pm_runtime_put(tgpio->dev->parent);
253
254 return 0;
255 }
256
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org