Re: [PATCH 6/6] powerpc/compat_sys: Declare syscalls

[Michael Ellerman <mpe@ellerman.id.au>]

Cédric Le Goater <clg@kaod.org> writes:
> This fixes a compile error with W=1.
>
> Cc: Christophe Leroy <christophe.leroy@c-s.fr>
> Signed-off-by: Cédric Le Goater <clg@kaod.org>
> ---
>  arch/powerpc/include/asm/syscalls.h | 31 +++++++++++++++++++++++++++++
>  1 file changed, 31 insertions(+)
>
> diff --git a/arch/powerpc/include/asm/syscalls.h b/arch/powerpc/include/asm/syscalls.h
> index 398171fdcd9f..1d5f2abaa38a 100644
> --- a/arch/powerpc/include/asm/syscalls.h
> +++ b/arch/powerpc/include/asm/syscalls.h
> @@ -6,6 +6,7 @@
>  #include <linux/compiler.h>
>  #include <linux/linkage.h>
>  #include <linux/types.h>
> +#include <linux/compat.h>
>  
>  struct rtas_args;
>  
> @@ -18,5 +19,35 @@ asmlinkage long sys_mmap2(unsigned long addr, size_t len,
>  asmlinkage long ppc64_personality(unsigned long personality);
>  asmlinkage long sys_rtas(struct rtas_args __user *uargs);
>  
> +#ifdef CONFIG_COMPAT
> +unsigned long compat_sys_mmap2(unsigned long addr, size_t len,
> +			       unsigned long prot, unsigned long flags,
> +			       unsigned long fd, unsigned long pgoff);
> +
> +compat_ssize_t compat_sys_pread64(unsigned int fd, char __user *ubuf, compat_size_t count,
> +				  u32 reg6, u32 pos1, u32 pos2);
> +
> +compat_ssize_t compat_sys_pwrite64(unsigned int fd, const char __user *ubuf, compat_size_t count,
> +				   u32 reg6, u32 pos1, u32 pos2);
> +
> +compat_ssize_t compat_sys_readahead(int fd, u32 r4, u32 offset1, u32 offset2, u32 count);
> +
> +asmlinkage int compat_sys_truncate64(const char __user *path, u32 reg4,
> +				     unsigned long len1, unsigned long len2);

asmlinkage does nothing, ie. it's an empty macro. Let's not add new uses
of it.

cheers