Hi,
在 2025/08/06 17:41, kernel test robot 写道:
All error/warnings (new ones prefixed by >>):
In file included from ./arch/sparc/include/generated/asm/div64.h:1,
from include/linux/math.h:6,
from include/linux/kernel.h:27,
from include/linux/cpumask.h:11,
from arch/sparc/include/asm/smp_32.h:15,
from arch/sparc/include/asm/smp.h:7,
from arch/sparc/include/asm/switch_to_32.h:5,
from arch/sparc/include/asm/switch_to.h:7,
from arch/sparc/include/asm/ptrace.h:120,
from arch/sparc/include/asm/thread_info_32.h:19,
from arch/sparc/include/asm/thread_info.h:7,
from include/linux/thread_info.h:60,
from arch/sparc/include/asm/current.h:15,
from include/linux/sched.h:12,
from lib/sbitmap.c:7:
lib/sbitmap.c: In function '__map_depth_with_shallow':
include/asm-generic/div64.h:183:35: warning: comparison of distinct pointer types lacks a cast
183 | (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \
| ^~
lib/sbitmap.c:222:20: note: in expansion of macro 'do_div'
222 | reminder = do_div(shallow_word_depth, sb->depth);
| ^~~~~~
/* The unnecessary pointer compare is there
* to check for type safety (n must be 64bit)
*/
# define do_div(n,base) ({
I didn't notice that under specific arch, do_div() will require the fist
paramater to be 64bit.
I'll wait a bit longer for people to review the solution before I send a
new version.
Thanks,
Kuai
