path: root/drivers/acpi
diff options
authorGustavo A. R. Silva <gustavo@embeddedor.com>2018-02-06 17:36:17 -0600
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2018-02-07 11:15:02 +0100
commitb52f451105020677cad61a13b3b67af3fdedb91f (patch)
tree472e39c7427a8e3dd1d29232b06c92140d0227da /drivers/acpi
parent1a9a126b5098160ca934a352617e9e65dbfa679d (diff)
ACPI / CPPC: Use 64-bit arithmetic instead of 32-bit
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>
Diffstat (limited to 'drivers/acpi')
1 files changed, 1 insertions, 1 deletions
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;

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