sys_move_pages() support for 32bit (i386 and x86_64 compat)

Add support for move_pages(0 for i386 and also add the
compat functions necessary to run 32 bit binaries on x86_64.

Signed-off-by: Christoph Lameter <clameter@sgi.com>

Index: linux-2.6.17-rc4-mm2/arch/i386/kernel/syscall_table.S
===================================================================
--- linux-2.6.17-rc4-mm2.orig/arch/i386/kernel/syscall_table.S	2006-05-20 20:23:11.000000000 -0700
+++ linux-2.6.17-rc4-mm2/arch/i386/kernel/syscall_table.S	2006-05-20 21:20:20.000000000 -0700
@@ -315,3 +315,5 @@
 	.long sys_splice
 	.long sys_sync_file_range
 	.long sys_tee			/* 315 */
+	.long sys_ni_syscall		/* vmsplice */
+	.long sys_move_pages
Index: linux-2.6.17-rc4-mm2/arch/x86_64/ia32/ia32entry.S
===================================================================
--- linux-2.6.17-rc4-mm2.orig/arch/x86_64/ia32/ia32entry.S	2006-05-20 20:23:11.000000000 -0700
+++ linux-2.6.17-rc4-mm2/arch/x86_64/ia32/ia32entry.S	2006-05-20 21:20:20.000000000 -0700
@@ -699,4 +699,5 @@
 	.quad sys_sync_file_range
 	.quad sys_tee
 	.quad compat_sys_vmsplice
+	.quad compat_sys_move_pages
 ia32_syscall_end:		
Index: linux-2.6.17-rc4-mm2/fs/compat.c
===================================================================
--- linux-2.6.17-rc4-mm2.orig/fs/compat.c	2006-05-20 20:23:11.000000000 -0700
+++ linux-2.6.17-rc4-mm2/fs/compat.c	2006-05-21 15:35:01.000000000 -0700
@@ -1329,6 +1329,26 @@
 	return sys_vmsplice(fd, iov, nr_segs, flags);
 }
 
+asmlinkage long
+compat_sys_move_pages(int pid, unsigned long nr_pages,
+		const compat_ulong_t __user *pages32,
+		const int __user *nodes,
+		int __user *status,
+		unsigned int flags)
+{
+	void **pages;
+	int i;
+
+	pages = compat_alloc_user_space(nr_pages * sizeof(unsigned long));
+	for (i = 0; i < nr_pages; i++) {
+		void __user *p;
+		if (get_user(p, pages32 + i) ||
+			put_user(compat_ptr(p), pages + i))
+			return -EFAULT;
+	}
+	return sys_move_pages(pid, nr_pages, pages, nodes, status, flags);
+}
+
 /*
  * Exactly like fs/open.c:sys_open(), except that it doesn't set the
  * O_LARGEFILE flag.
Index: linux-2.6.17-rc4-mm2/include/asm-i386/unistd.h
===================================================================
--- linux-2.6.17-rc4-mm2.orig/include/asm-i386/unistd.h	2006-05-20 20:23:11.000000000 -0700
+++ linux-2.6.17-rc4-mm2/include/asm-i386/unistd.h	2006-05-20 21:20:20.000000000 -0700
@@ -322,10 +322,11 @@
 #define __NR_sync_file_range	314
 #define __NR_tee		315
 #define __NR_vmsplice		316
+#define __NR_move_pages		317
 
 #ifdef __KERNEL__
 
-#define NR_syscalls 317
+#define NR_syscalls 318
 
 /*
  * user-visible error numbers are in the range -1 - -128: see