fix uml-x86_64

__NR_syscall_max is done in x86_64 asm-offsets; do an equivalent in
uml kern_constants.h

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/um/sys-x86_64/syscall_table.c b/arch/um/sys-x86_64/syscall_table.c
index 9e9ad72..5133988 100644
--- a/arch/um/sys-x86_64/syscall_table.c
+++ b/arch/um/sys-x86_64/syscall_table.c
@@ -4,6 +4,7 @@
 #include <linux/linkage.h>
 #include <linux/sys.h>
 #include <linux/cache.h>
+#include <kern_constants.h>
 
 #define __NO_STUBS
 
@@ -45,8 +46,8 @@
 
 extern void sys_ni_syscall(void);
 
-sys_call_ptr_t sys_call_table[__NR_syscall_max+1] __cacheline_aligned = {
+sys_call_ptr_t sys_call_table[UM_NR_syscall_max+1] __cacheline_aligned = {
 	/* Smells like a like a compiler bug -- it doesn't work when the & below is removed. */
-	[0 ... __NR_syscall_max] = &sys_ni_syscall,
+	[0 ... UM_NR_syscall_max] = &sys_ni_syscall,
 #include <asm-x86_64/unistd.h>
 };