From 234f186a7d70707c54aa68b0b37a0d7bbefe911e Mon Sep 17 00:00:00 2001
From: Jonas 'Sortie' Termansen <sortie@maxsi.org>
Date: Sun, 23 Feb 2014 14:09:22 +0100
Subject: [PATCH] Ensure system call indices are valid expressions in libc
 syscall stubs.

---
 libc/include/sys/syscall.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libc/include/sys/syscall.h b/libc/include/sys/syscall.h
index bc8ea75f..eb793988 100644
--- a/libc/include/sys/syscall.h
+++ b/libc/include/sys/syscall.h
@@ -59,6 +59,11 @@
 /* Create a function that selects the right system call and jumps into the
    generic implementation of system calls. */
 #define SYSCALL_FUNCTION(syscall_name, syscall_index) \
+__attribute__((unused)) \
+static void __verify_index_expression_##syscall_name(void) \
+{ \
+	(void) syscall_index; \
+} \
 __asm__("\n" \
 ".pushsection .text\n" \
 ".type " #syscall_name ", @function\n" \