Re: [PATCH] uapi: fix another asm/shmbuf.h userspace compilation error

Arnd Bergmann
2017-03-02T13:07:20Z

On Thu, Mar 2, 2017 at 1:46 AM, Dmitry V. Levin <ldv@altlinux.org> wrote:
> Replace size_t with __kernel_size_t to fix asm/shmbuf.h userspace
> compilation errors like this:
>
> /usr/include/asm-generic/shmbuf.h:28:2: error: unknown type name 'size_t'
> size_t shm_segsz; /* size of segment (bytes) */
>
> x32 is the only architecture where sizeof(size_t) is less than
> sizeof(__kernel_size_t), but as the kernel treats shm_segsz field as
> __kernel_size_t anyway, UAPI should follow. Thanks to little-endiannes
> of x32 and 64-bit alignment of the field following shm_segsz, this
> change doesn't break ABI, and the difference doesn't manifest itself
> easily.
>
> Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>

Acked-by: Arnd Bergmann <arnd@arndb.de>