Commit eb8f3142 authored Apr 18, 2009 by Mikael Pettersson Committed by Russell King Apr 20, 2009

[ARM] 5456/1: add sys_preadv and sys_pwritev



Kernel 2.6.30-rc1 added sys_preadv and sys_pwritev to most archs
but not ARM, resulting in

<stdin>:1421:2: warning: #warning syscall preadv not implemented
<stdin>:1425:2: warning: #warning syscall pwritev not implemented

This patch adds sys_preadv and sys_pwritev to ARM.

These syscalls simply take five long-sized parameters, so they
should have no calling-convention/ABI issues in the kernel.

Tested on armv5tel eabi using a preadv/pwritev test program posted
on linuxppc-dev earlier this month.

It would be nice to get this into the kernel before 2.6.30 final,
so that glibc's kernel version feature test for these syscalls
doesn't have to special-case ARM.

Signed-off-by: Mikael Pettersson <mikpe@it.uu.se>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

parent d91dfbb4

arch/arm/include/asm/unistd.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -387,6 +387,8 @@
		#define __NR_dup3 (__NR_SYSCALL_BASE+358)
		#define __NR_pipe2 (__NR_SYSCALL_BASE+359)
		#define __NR_inotify_init1 (__NR_SYSCALL_BASE+360)
		#define __NR_preadv (__NR_SYSCALL_BASE+361)
		#define __NR_pwritev (__NR_SYSCALL_BASE+362)

		/*
		* The following SWIs are ARM private.

arch/arm/kernel/calls.S

+2 −0

Original line number	Diff line number	Diff line
		@@ -370,6 +370,8 @@
		CALL(sys_dup3)
		CALL(sys_pipe2)
		/* 360 */ CALL(sys_inotify_init1)
		CALL(sys_preadv)
		CALL(sys_pwritev)
		#ifndef syscalls_counted
		.equ syscalls_padding, ((NR_syscalls + 3) & ~3) - NR_syscalls
		#define syscalls_counted