Hi Nicolas, [auto build test WARNING on asm-generic/master] [also WARNING on: v4.3 next-20151103] url: https://github.com/0day-ci/linux/commits/Nicolas-Pitre/div64-h-optimize-do_div-for-power-of-two-constant-divisors/20151103-065348 base: https://github.com/0day-ci/linux Nicolas-Pitre/div64-h-optimize-do_div-for-power-of-two-constant-divisors/20151103-065348 config: arm-allyesconfig (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 # save the attached .config to linux build tree make.cross ARCH=arm All warnings (new ones prefixed by >>): In file included from arch/arm/include/asm/div64.h:126:0, from include/linux/kernel.h:136, from drivers/cpufreq/s5pv210-cpufreq.c:13: drivers/cpufreq/s5pv210-cpufreq.c: In function 's5pv210_set_refresh': include/asm-generic/div64.h:217:28: warning: comparison of distinct pointer types lacks a cast (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \ ^ >> drivers/cpufreq/s5pv210-cpufreq.c:215:2: note: in expansion of macro 'do_div' do_div(tmp, freq); ^ >> drivers/cpufreq/s5pv210-cpufreq.c:215:2: warning: right shift count >= width of type In file included from include/linux/kernel.h:136:0, from drivers/cpufreq/s5pv210-cpufreq.c:13: arch/arm/include/asm/div64.h:49:20: warning: passing argument 1 of '__div64_32' from incompatible pointer type #define __div64_32 __div64_32 ^ include/asm-generic/div64.h:235:11: note: in expansion of macro '__div64_32' __rem = __div64_32(&(n), __base); \ ^ >> drivers/cpufreq/s5pv210-cpufreq.c:215:2: note: in expansion of macro 'do_div' do_div(tmp, freq); ^ arch/arm/include/asm/div64.h:32:24: note: expected 'uint64_t *' but argument is of type 'long unsigned int *' static inline uint32_t __div64_32(uint64_t *n, uint32_t base) ^ In file included from arch/arm/include/asm/div64.h:126:0, from include/linux/kernel.h:136, from drivers/cpufreq/s5pv210-cpufreq.c:13: include/asm-generic/div64.h:217:28: warning: comparison of distinct pointer types lacks a cast (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \ ^ drivers/cpufreq/s5pv210-cpufreq.c:219:2: note: in expansion of macro 'do_div' do_div(tmp1, tmp); ^ drivers/cpufreq/s5pv210-cpufreq.c:219:2: warning: right shift count >= width of type In file included from include/linux/kernel.h:136:0, from drivers/cpufreq/s5pv210-cpufreq.c:13: arch/arm/include/asm/div64.h:49:20: warning: passing argument 1 of '__div64_32' from incompatible pointer type #define __div64_32 __div64_32 ^ include/asm-generic/div64.h:235:11: note: in expansion of macro '__div64_32' __rem = __div64_32(&(n), __base); \ ^ drivers/cpufreq/s5pv210-cpufreq.c:219:2: note: in expansion of macro 'do_div' do_div(tmp1, tmp); ^ arch/arm/include/asm/div64.h:32:24: note: expected 'uint64_t *' but argument is of type 'long unsigned int *' static inline uint32_t __div64_32(uint64_t *n, uint32_t base) ^ vim +/do_div +215 drivers/cpufreq/s5pv210-cpufreq.c 83efc743 arch/arm/mach-s5pv210/cpufreq.c Jaecheol Lee 2010-10-12 199 { 83efc743 arch/arm/mach-s5pv210/cpufreq.c Jaecheol Lee 2010-10-12 200 unsigned long tmp, tmp1; 83efc743 arch/arm/mach-s5pv210/cpufreq.c Jaecheol Lee 2010-10-12 201 void __iomem *reg = NULL; 83efc743 arch/arm/mach-s5pv210/cpufreq.c Jaecheol Lee 2010-10-12 202 d62fa311 arch/arm/mach-s5pv210/cpufreq.c Jonghwan Choi 2011-05-12 203 if (ch == DMC0) { 6d4ed0f4 drivers/cpufreq/s5pv210-cpufreq.c Tomasz Figa 2014-07-03 204 reg = (dmc_base[0] + 0x30); d62fa311 arch/arm/mach-s5pv210/cpufreq.c Jonghwan Choi 2011-05-12 205 } else if (ch == DMC1) { 6d4ed0f4 drivers/cpufreq/s5pv210-cpufreq.c Tomasz Figa 2014-07-03 206 reg = (dmc_base[1] + 0x30); d62fa311 arch/arm/mach-s5pv210/cpufreq.c Jonghwan Choi 2011-05-12 207 } else { 83efc743 arch/arm/mach-s5pv210/cpufreq.c Jaecheol Lee 2010-10-12 208 printk(KERN_ERR "Cannot find DMC port\n"); d62fa311 arch/arm/mach-s5pv210/cpufreq.c Jonghwan Choi 2011-05-12 209 return; d62fa311 arch/arm/mach-s5pv210/cpufreq.c Jonghwan Choi 2011-05-12 210 } 83efc743 arch/arm/mach-s5pv210/cpufreq.c Jaecheol Lee 2010-10-12 211 83efc743 arch/arm/mach-s5pv210/cpufreq.c Jaecheol Lee 2010-10-12 212 /* Find current DRAM frequency */ 83efc743 arch/arm/mach-s5pv210/cpufreq.c Jaecheol Lee 2010-10-12 213 tmp = s5pv210_dram_conf[ch].freq; 83efc743 arch/arm/mach-s5pv210/cpufreq.c Jaecheol Lee 2010-10-12 214 83efc743 arch/arm/mach-s5pv210/cpufreq.c Jaecheol Lee 2010-10-12 @215 do_div(tmp, freq); 83efc743 arch/arm/mach-s5pv210/cpufreq.c Jaecheol Lee 2010-10-12 216 83efc743 arch/arm/mach-s5pv210/cpufreq.c Jaecheol Lee 2010-10-12 217 tmp1 = s5pv210_dram_conf[ch].refresh; 83efc743 arch/arm/mach-s5pv210/cpufreq.c Jaecheol Lee 2010-10-12 218 83efc743 arch/arm/mach-s5pv210/cpufreq.c Jaecheol Lee 2010-10-12 219 do_div(tmp1, tmp); 83efc743 arch/arm/mach-s5pv210/cpufreq.c Jaecheol Lee 2010-10-12 220 83efc743 arch/arm/mach-s5pv210/cpufreq.c Jaecheol Lee 2010-10-12 221 __raw_writel(tmp1, reg); 83efc743 arch/arm/mach-s5pv210/cpufreq.c Jaecheol Lee 2010-10-12 222 } 83efc743 arch/arm/mach-s5pv210/cpufreq.c Jaecheol Lee 2010-10-12 223 :::::: The code at line 215 was first introduced by commit :::::: 83efc7432f881d4f4bcedd6800710c2c4c24c58d ARM: S5PV210: Add support CPUFREQ :::::: TO: Jaecheol Lee <jc.lee@xxxxxxxxxxx> :::::: CC: Kukjin Kim <kgene.kim@xxxxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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