On Thu, Dec 7, 2017 at 1:32 AM, Qu Wenruo <[email protected]> wrote:
>
>
> On 2017年12月06日 22:18, Arnd Bergmann wrote:
>> The return value of sizeof() is of type size_t, so we must print it
>> using the %z format modifier rather than %l to avoid this warning
>> on some architectures:
>>
>> fs/btrfs/tree-checker.c: In function 'check_dir_item':
>> fs/btrfs/tree-checker.c:273:50: error: format '%lu' expects argument of type
>> 'long unsigned int', but argument 5 has type 'u32' {aka 'unsigned int'}
>> [-Werror=format=]
>
> Any idea about which architecture will cause such warning?
> On x86_64 I always fail to get such warning.
I think all 32-bit architectures:
#ifndef __kernel_size_t
#if __BITS_PER_LONG != 64
typedef unsigned int __kernel_size_t;
typedef int __kernel_ssize_t;
typedef int __kernel_ptrdiff_t;
#else
typedef __kernel_ulong_t __kernel_size_t;
typedef __kernel_long_t __kernel_ssize_t;
typedef __kernel_long_t __kernel_ptrdiff_t;
#endif
#endif
Arnd
