[PATCH v6 14/21] arm64:ilp32: add sys_ilp32.c and a separate table (in entry.S) to use it

On Fri, Jan 08, 2016 at 10:21:06AM +0100, Arnd Bergmann wrote:

On Friday 08 January 2016 02:34:32 Yury Norov wrote:

quoted

@@ -688,6 +692,12 @@ ni_sys:
 	b	ret_fast_syscall
 ENDPROC(el0_svc)
 
+#ifdef CONFIG_ARM64_ILP32
+el0_ilp32_svc:
+	adrp	stbl, sys_call_ilp32_table // load syscall table pointer
+	b el0_svc_naked
+#endif

Don't we still need some code that clears the top halves of the 32-bit
arguments? That thread has taken so many turns now that I'm confused
about what we actually need, but I thought we had concluded that your
current approach has at some some problems.

quoted

+#include <asm/syscall.h>
+
+#undef __SYSCALL
+#undef __SC_COMP
+#undef __SC_3264
+#undef __SC_COMP_3264

The four #undef are not needed, right?

	Arnd

No, removing any of them follows compilation problems.