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SubjectRe: [Patch 2/2] xtensa: use generic sys_pipe()
[CC Chris]

On Wed, Jul 22, 2009 at 05:08:42AM -0400, Amerigo Wang wrote:
>
> As suggested by Al, we can use the generic sys_pipe() instead of xtensa_pipe()
> for xtensa.
>
> Signed-off-by: WANG Cong <amwang@redhat.com>
> Cc: Al Viro <viro@zeniv.linux.org.uk>
> CC: Linus Torvalds <torvalds@linux-foundation.org>

Reviewed-by: Johannes Weiner <jw@emlix.com>

> ---
> diff --git a/arch/xtensa/include/asm/syscall.h b/arch/xtensa/include/asm/syscall.h
> index 05cebf8..76a1fb8 100644
> --- a/arch/xtensa/include/asm/syscall.h
> +++ b/arch/xtensa/include/asm/syscall.h
> @@ -12,7 +12,6 @@ struct pt_regs;
> struct sigaction;
> asmlinkage long xtensa_execve(char*, char**, char**, struct pt_regs*);
> asmlinkage long xtensa_clone(unsigned long, unsigned long, struct pt_regs*);
> -asmlinkage long xtensa_pipe(int __user *);
> asmlinkage long xtensa_mmap2(unsigned long, unsigned long, unsigned long,
> unsigned long, unsigned long, unsigned long);
> asmlinkage long xtensa_ptrace(long, long, long, long);
> diff --git a/arch/xtensa/include/asm/unistd.h b/arch/xtensa/include/asm/unistd.h
> index c092c8f..b6880c8 100644
> --- a/arch/xtensa/include/asm/unistd.h
> +++ b/arch/xtensa/include/asm/unistd.h
> @@ -94,7 +94,7 @@ __SYSCALL( 35, sys_readlink, 3)
> #define __NR_mknod 36
> __SYSCALL( 36, sys_mknod, 3)
> #define __NR_pipe 37
> -__SYSCALL( 37, xtensa_pipe, 1)
> +__SYSCALL(37, sys_pipe, 1)

It would have been nice to keep the spacing but that shouldn't be a
show stopper..

> #define __NR_unlink 38
> __SYSCALL( 38, sys_unlink, 1)
> #define __NR_rmdir 39
> diff --git a/arch/xtensa/kernel/syscall.c b/arch/xtensa/kernel/syscall.c
> index ac15ecb..c7279be 100644
> --- a/arch/xtensa/kernel/syscall.c
> +++ b/arch/xtensa/kernel/syscall.c
> @@ -39,24 +39,6 @@ syscall_t sys_call_table[__NR_syscall_count] /* FIXME __cacheline_aligned */= {
> #include <asm/unistd.h>
> };
>
> -/*
> - * xtensa_pipe() is the normal C calling standard for creating a pipe. It's not
> - * the way unix traditional does this, though.
> - */
> -
> -asmlinkage long xtensa_pipe(int __user *userfds)
> -{
> - int fd[2];
> - int error;
> -
> - error = do_pipe_flags(fd, 0);
> - if (!error) {
> - if (copy_to_user(userfds, fd, 2 * sizeof(int)))
> - error = -EFAULT;
> - }
> - return error;
> -}
> -
>
> asmlinkage long xtensa_mmap2(unsigned long addr, unsigned long len,
> unsigned long prot, unsigned long flags,

Hannes


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