From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: Wed, 17 Jun 2020 12:06:28 +0000 (+1000)
Subject: tests/xics: Ensure no compiler optimisations in delay()
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=0b82024b011c77d3e7c2374b17855031db91d650;p=microwatt.git

tests/xics: Ensure no compiler optimisations in delay()

In case it would be tempted to "read ahead" the delay function

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---

diff --git a/tests/xics/xics.c b/tests/xics/xics.c
index 46f9a01..f41c3a4 100644
--- a/tests/xics/xics.c
+++ b/tests/xics/xics.c
@@ -12,8 +12,8 @@ void delay(void)
 {
 	static volatile int i;
 
-	for (i = 0; i < 10; ++i)
-		;
+	for (i = 0; i < 16; ++i)
+		__asm__ volatile("" : : : "memory");
 }
 
 void print_number(unsigned int i) // only for i = 0-999