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SubjectRe: [PATCH v6 6/7] clk: Add common clock driver for BM1880 SoC
Hi Manivannan,

I love your patch! Yet something to improve:

[auto build test ERROR on clk/clk-next]
[also build test ERROR on v5.4-rc5 next-20191029]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url: https://github.com/0day-ci/linux/commits/Manivannan-Sadhasivam/Add-Bitmain-BM1880-clock-driver/20191029-142130
base: https://git.kernel.org/pub/scm/linux/kernel/git/clk/linux.git clk-next
config: arm-allmodconfig (attached as .config)
compiler: arm-linux-gnueabi-gcc (GCC) 7.4.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
GCC_VERSION=7.4.0 make.cross ARCH=arm

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

In file included from arch/arm/include/asm/div64.h:127:0,
from include/linux/kernel.h:18,
from include/linux/list.h:9,
from include/linux/kobject.h:19,
from include/linux/of.h:17,
from include/linux/clk-provider.h:9,
from drivers/clk/clk-bm1880.c:9:
drivers/clk/clk-bm1880.c: In function 'bm1880_pll_rate_calc':
include/asm-generic/div64.h:226:28: warning: comparison of distinct pointer types lacks a cast
(void)(((typeof((n)) *)0) == ((uint64_t *)0)); \
^
drivers/clk/clk-bm1880.c:488:2: note: in expansion of macro 'do_div'
do_div(numerator, denominator);
^~~~~~
In file included from arch/arm/include/asm/bitops.h:27:0,
from include/linux/bitops.h:19,
from include/linux/of.h:15,
from include/linux/clk-provider.h:9,
from drivers/clk/clk-bm1880.c:9:
include/asm-generic/div64.h:239:25: warning: right shift count >= width of type [-Wshift-count-overflow]
} else if (likely(((n) >> 32) == 0)) { \
^
include/linux/compiler.h:77:40: note: in definition of macro 'likely'
# define likely(x) __builtin_expect(!!(x), 1)
^
drivers/clk/clk-bm1880.c:488:2: note: in expansion of macro 'do_div'
do_div(numerator, denominator);
^~~~~~
In file included from arch/arm/include/asm/div64.h:127:0,
from include/linux/kernel.h:18,
from include/linux/list.h:9,
from include/linux/kobject.h:19,
from include/linux/of.h:17,
from include/linux/clk-provider.h:9,
from drivers/clk/clk-bm1880.c:9:
>> include/asm-generic/div64.h:243:22: error: passing argument 1 of '__div64_32' from incompatible pointer type [-Werror=incompatible-pointer-types]
__rem = __div64_32(&(n), __base); \
^
drivers/clk/clk-bm1880.c:488:2: note: in expansion of macro 'do_div'
do_div(numerator, denominator);
^~~~~~
In file included from include/linux/kernel.h:18:0,
from include/linux/list.h:9,
from include/linux/kobject.h:19,
from include/linux/of.h:17,
from include/linux/clk-provider.h:9,
from drivers/clk/clk-bm1880.c:9:
arch/arm/include/asm/div64.h:33:24: note: expected 'uint64_t * {aka long long unsigned int *}' but argument is of type 'long unsigned int *'
static inline uint32_t __div64_32(uint64_t *n, uint32_t base)
^~~~~~~~~~
cc1: some warnings being treated as errors
--
In file included from arch/arm/include/asm/div64.h:127:0,
from include/linux/kernel.h:18,
from include/linux/list.h:9,
from include/linux/kobject.h:19,
from include/linux/of.h:17,
from include/linux/clk-provider.h:9,
from drivers//clk/clk-bm1880.c:9:
drivers//clk/clk-bm1880.c: In function 'bm1880_pll_rate_calc':
include/asm-generic/div64.h:226:28: warning: comparison of distinct pointer types lacks a cast
(void)(((typeof((n)) *)0) == ((uint64_t *)0)); \
^
drivers//clk/clk-bm1880.c:488:2: note: in expansion of macro 'do_div'
do_div(numerator, denominator);
^~~~~~
In file included from arch/arm/include/asm/bitops.h:27:0,
from include/linux/bitops.h:19,
from include/linux/of.h:15,
from include/linux/clk-provider.h:9,
from drivers//clk/clk-bm1880.c:9:
include/asm-generic/div64.h:239:25: warning: right shift count >= width of type [-Wshift-count-overflow]
} else if (likely(((n) >> 32) == 0)) { \
^
include/linux/compiler.h:77:40: note: in definition of macro 'likely'
# define likely(x) __builtin_expect(!!(x), 1)
^
drivers//clk/clk-bm1880.c:488:2: note: in expansion of macro 'do_div'
do_div(numerator, denominator);
^~~~~~
In file included from arch/arm/include/asm/div64.h:127:0,
from include/linux/kernel.h:18,
from include/linux/list.h:9,
from include/linux/kobject.h:19,
from include/linux/of.h:17,
from include/linux/clk-provider.h:9,
from drivers//clk/clk-bm1880.c:9:
>> include/asm-generic/div64.h:243:22: error: passing argument 1 of '__div64_32' from incompatible pointer type [-Werror=incompatible-pointer-types]
__rem = __div64_32(&(n), __base); \
^
drivers//clk/clk-bm1880.c:488:2: note: in expansion of macro 'do_div'
do_div(numerator, denominator);
^~~~~~
In file included from include/linux/kernel.h:18:0,
from include/linux/list.h:9,
from include/linux/kobject.h:19,
from include/linux/of.h:17,
from include/linux/clk-provider.h:9,
from drivers//clk/clk-bm1880.c:9:
arch/arm/include/asm/div64.h:33:24: note: expected 'uint64_t * {aka long long unsigned int *}' but argument is of type 'long unsigned int *'
static inline uint32_t __div64_32(uint64_t *n, uint32_t base)
^~~~~~~~~~
cc1: some warnings being treated as errors

vim +/__div64_32 +243 include/asm-generic/div64.h

^1da177e4c3f41 Linus Torvalds 2005-04-16 219
^1da177e4c3f41 Linus Torvalds 2005-04-16 220 /* The unnecessary pointer compare is there
^1da177e4c3f41 Linus Torvalds 2005-04-16 221 * to check for type safety (n must be 64bit)
^1da177e4c3f41 Linus Torvalds 2005-04-16 222 */
^1da177e4c3f41 Linus Torvalds 2005-04-16 223 # define do_div(n,base) ({ \
^1da177e4c3f41 Linus Torvalds 2005-04-16 224 uint32_t __base = (base); \
^1da177e4c3f41 Linus Torvalds 2005-04-16 225 uint32_t __rem; \
^1da177e4c3f41 Linus Torvalds 2005-04-16 226 (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \
911918aa7ef6f8 Nicolas Pitre 2015-11-02 227 if (__builtin_constant_p(__base) && \
911918aa7ef6f8 Nicolas Pitre 2015-11-02 228 is_power_of_2(__base)) { \
911918aa7ef6f8 Nicolas Pitre 2015-11-02 229 __rem = (n) & (__base - 1); \
911918aa7ef6f8 Nicolas Pitre 2015-11-02 230 (n) >>= ilog2(__base); \
461a5e51060c93 Nicolas Pitre 2015-10-30 231 } else if (__div64_const32_is_OK && \
461a5e51060c93 Nicolas Pitre 2015-10-30 232 __builtin_constant_p(__base) && \
461a5e51060c93 Nicolas Pitre 2015-10-30 233 __base != 0) { \
461a5e51060c93 Nicolas Pitre 2015-10-30 234 uint32_t __res_lo, __n_lo = (n); \
461a5e51060c93 Nicolas Pitre 2015-10-30 235 (n) = __div64_const32(n, __base); \
461a5e51060c93 Nicolas Pitre 2015-10-30 236 /* the remainder can be computed with 32-bit regs */ \
461a5e51060c93 Nicolas Pitre 2015-10-30 237 __res_lo = (n); \
461a5e51060c93 Nicolas Pitre 2015-10-30 238 __rem = __n_lo - __res_lo * __base; \
911918aa7ef6f8 Nicolas Pitre 2015-11-02 239 } else if (likely(((n) >> 32) == 0)) { \
^1da177e4c3f41 Linus Torvalds 2005-04-16 240 __rem = (uint32_t)(n) % __base; \
^1da177e4c3f41 Linus Torvalds 2005-04-16 241 (n) = (uint32_t)(n) / __base; \
^1da177e4c3f41 Linus Torvalds 2005-04-16 242 } else \
^1da177e4c3f41 Linus Torvalds 2005-04-16 @243 __rem = __div64_32(&(n), __base); \
^1da177e4c3f41 Linus Torvalds 2005-04-16 244 __rem; \
^1da177e4c3f41 Linus Torvalds 2005-04-16 245 })
^1da177e4c3f41 Linus Torvalds 2005-04-16 246

:::::: The code at line 243 was first introduced by commit
:::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2

:::::: TO: Linus Torvalds <torvalds@ppc970.osdl.org>
:::::: CC: Linus Torvalds <torvalds@ppc970.osdl.org>

---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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