Hi Damien.Horsley, [auto build test results on v4.3-rc3 -- if it's inappropriate base, please ignore] config: blackfin-allmodconfig (attached as .config) 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 5037c15dd47c86ab337b73c7f9ffcabe1bb86f3b # 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 >>): sound/soc/img/img-i2s-out.c: In function 'img_i2s_out_set_fmt': >> include/asm-generic/io.h:163:2: warning: 'reg' may be used uninitialized in this function [-Wuninitialized] sound/soc/img/img-i2s-out.c:291:6: note: 'reg' was declared here vim +/reg +163 include/asm-generic/io.h 9216efaf Thierry Reding 2014-10-01 147 __raw_writeb(value, addr); 3f7e212d Arnd Bergmann 2009-05-13 148 } 9216efaf Thierry Reding 2014-10-01 149 #endif 3f7e212d Arnd Bergmann 2009-05-13 150 9216efaf Thierry Reding 2014-10-01 151 #ifndef writew 9216efaf Thierry Reding 2014-10-01 152 #define writew writew 9216efaf Thierry Reding 2014-10-01 153 static inline void writew(u16 value, volatile void __iomem *addr) 3f7e212d Arnd Bergmann 2009-05-13 154 { 9216efaf Thierry Reding 2014-10-01 155 __raw_writew(cpu_to_le16(value), addr); 3f7e212d Arnd Bergmann 2009-05-13 156 } 9216efaf Thierry Reding 2014-10-01 157 #endif 3f7e212d Arnd Bergmann 2009-05-13 158 9216efaf Thierry Reding 2014-10-01 159 #ifndef writel 9216efaf Thierry Reding 2014-10-01 160 #define writel writel 9216efaf Thierry Reding 2014-10-01 161 static inline void writel(u32 value, volatile void __iomem *addr) 3f7e212d Arnd Bergmann 2009-05-13 162 { 9216efaf Thierry Reding 2014-10-01 @163 __raw_writel(__cpu_to_le32(value), addr); 3f7e212d Arnd Bergmann 2009-05-13 164 } 9216efaf Thierry Reding 2014-10-01 165 #endif 3f7e212d Arnd Bergmann 2009-05-13 166 9216efaf Thierry Reding 2014-10-01 167 #ifdef CONFIG_64BIT 9216efaf Thierry Reding 2014-10-01 168 #ifndef writeq 9216efaf Thierry Reding 2014-10-01 169 #define writeq writeq 9216efaf Thierry Reding 2014-10-01 170 static inline void writeq(u64 value, volatile void __iomem *addr) 3f7e212d Arnd Bergmann 2009-05-13 171 { :::::: The code at line 163 was first introduced by commit :::::: 9216efafc52ff99e9351ef60de5fcafc2bc8adb6 asm-generic/io.h: Reconcile I/O accessor overrides :::::: TO: Thierry Reding <treding@xxxxxxxxxx> :::::: CC: Thierry Reding <treding@xxxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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