Re: [PATCH 5/5] ARM: asm/div64.h: adjust to generic codde

From: kbuild test robot
Date: Tue Nov 03 2015 - 16:40:19 EST

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

Attachment: .config.gz
Description: Binary data