From 29c7c946139459945dacfb8bda67ab70b90ac10e Mon Sep 17 00:00:00 2001
From: "Gustavo A. R. Silva" <gustavo@embeddedor.com>
Date: Tue, 6 Feb 2018 17:36:17 -0600
Subject: [PATCH 07/14] ACPI / CPPC: Use 64-bit arithmetic instead of 32-bit

Git-commit: b52f451105020677cad61a13b3b67af3fdedb91f
Patch-mainline: v4.16-rc1
References: bsc#1084771

Add suffix ULL to constant 500 in order to give the compiler complete
information about the proper arithmetic to use. Notice that this
constant is used in a context that expects an expression of type
u64 (64 bits, unsigned).

The expression NUM_RETRIES * cppc_ss->latency at line 578, which at
preprocessing time translates to 500 * cppc_ss->latency is currently
being evaluated using 32-bit arithmetic.

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@suse.com>
---
 drivers/acpi/cppc_acpi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/acpi/cppc_acpi.c b/drivers/acpi/cppc_acpi.c
index 06ea4749ebd9..0afbb2658cbc 100644
--- a/drivers/acpi/cppc_acpi.c
+++ b/drivers/acpi/cppc_acpi.c
@@ -119,7 +119,7 @@ static DEFINE_PER_CPU(struct cpc_desc *, cpc_desc_ptr);
  * to PCC commands. Keeping it high enough to cover emulators where
  * the processors run painfully slow.
  */
-#define NUM_RETRIES 500
+#define NUM_RETRIES 500ULL
 
 struct cppc_attr {
 	struct attribute attr;
-- 
2.11.0