From: Jan Luebbe <jlu@pengutronix.de>
Date: Thu, 2 May 2013 14:47:12 +0000 (+0200)
Subject: libkmod: Avoid calling syscall() with -1
X-Git-Tag: v14~5
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=5eac795b8b067842caec32f96d55a7554c3c67f9;p=platform%2Fupstream%2Fkmod.git

libkmod: Avoid calling syscall() with -1

At least in qemu 1.4.1 for vexpress/arm-cortexa9, this resulted in an
illegal instruction error. Solve that by returning an error when
__NR_finit_module is -1.
---

diff --git a/libkmod/missing.h b/libkmod/missing.h
index edb88b9..b45bbe2 100644
--- a/libkmod/missing.h
+++ b/libkmod/missing.h
@@ -20,8 +20,15 @@
 #endif
 
 #ifndef HAVE_FINIT_MODULE
+#include <errno.h>
+
 static inline int finit_module(int fd, const char *uargs, int flags)
 {
+	if (__NR_finit_module == -1) {
+		errno = ENOSYS;
+		return -1;
+	}
+
 	return syscall(__NR_finit_module, fd, uargs, flags);
 }
 #endif