Silence compiler warnings for expected and handled error conditions

Silly compiler emitting warnings that just cause people to break code
attempting to silence the compiler.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

2 files changed, 13 insertions, 2 deletions

diff --git a/lib/drmtest.c b/lib/drmtest.c
index 9a1232f4..632fec41 100644
--- a/lib/drmtest.c
+++ b/lib/drmtest.c
@@ -218,11 +218,11 @@ int drm_get_card(void)
 	return -1;
 }
 
-static void modprobe(const char *driver)
+static int modprobe(const char *driver)
 {
 	char buf[128];
 	snprintf(buf, sizeof(buf), "/sbin/modprobe -s %s", driver);
-	system(buf);
+	return system(buf);
 }
 
 /**
diff --git a/lib/igt_core.h b/lib/igt_core.h
index 59952331..64d823f6 100644
--- a/lib/igt_core.h
+++ b/lib/igt_core.h
@@ -297,6 +297,17 @@ void __igt_fail_assert(const char *domain, const char *file,
 void igt_exit(void) __attribute__((noreturn));
 
 /**
+ * igt_ignore_warn:
+ * @expr: condition to ignore
+ *
+ *
+ * Stops the compiler warning about an unused return value.
+ */
+static inline void igt_ignore_warn(bool value)
+{
+}
+
+/**
  * igt_assert:
  * @expr: condition to test
  *