Re: [next:master 156/212] fs/binfmt_elf.c:158:18: note: in expansion of macro 'min'

[David Rientjes <rientjes@google.com>]

On Thu, 26 Jun 2014, Jeff Liu wrote:

> >>>    fs/binfmt_elf.c: In function 'get_atrandom_bytes':
> >>>    include/linux/kernel.h:713:17: warning: comparison of distinct pointer types lacks a cast
> >>>      (void) (&_min1 == &_min2);  \
> >>>                     ^
> >>>>> fs/binfmt_elf.c:158:18: note: in expansion of macro 'min'
> >>>       size_t chunk = min(nbytes, sizeof(random_variable));
> >>
> >> I remember we have the same report on arch mn10300 about half a year ago, but the code
> >> is correct. :)
> >>
> > 
> > Casting the sizeof operator to size_t would fix this issue on am33.
> 
> Thanks for pointing this out, I once considered to use min_t() to do explicitly casting.
> However, both values to compare are already size_t, maybe this depending on the compiler's
> result of what sizeof() would be...
> 

Have you read arch/mn10300/include/uapi/asm/posix_types.h?  am33 defines 
this to be unsigned int for gcc version 4.  You would not see this warning 
with gcc major version != 4 or if you do what I suggested and cast it to 
size_t.

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