x86-64, ia32: Move compat_ni_syscall into C and its own file

Move compat_ni_syscall out of ia32entry.S and into its own .c file.
Although this is a trivial function, it is not performance-critical,
and this will simplify further cleanups.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

arch/x86/ia32/Makefile

@@ -3,6 +3,7 @@
 #
 
 obj-$(CONFIG_IA32_EMULATION) := ia32entry.o sys_ia32.o ia32_signal.o
+obj-$(CONFIG_IA32_EMULATION) += nosyscall.o
 
 sysv-$(CONFIG_SYSVIPC) := ipc32.o
 obj-$(CONFIG_IA32_EMULATION) += $(sysv-y)

arch/x86/ia32/ia32entry.S

@@ -453,9 +453,6 @@ ia32_badsys:
 	movq $-ENOSYS,%rax
 	jmp ia32_sysret
 
-quiet_ni_syscall:
-	movq $-ENOSYS,%rax
-	ret
 	CFI_ENDPROC
 	
 	.macro PTREGSCALL label, func, arg

arch/x86/ia32/nosyscall.c

@@ -0,0 +1,7 @@
+#include <linux/kernel.h>
+#include <linux/errno.h>
+
+long compat_ni_syscall(void)
+{
+	return -ENOSYS;
+}