[PATCH ?] ACPI: pr->id is unsigned

[roel kluin]

since pr->id is unsigned, shouldn't something like
the patch below be applied?

Signed-off-by: Roel Kluin <roel.kluin@xxxxxxxxx>
---
diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c
index e36422a..75c0f76 100644
--- a/drivers/acpi/processor_core.c
+++ b/drivers/acpi/processor_core.c
@@ -667,7 +667,7 @@ static int __cpuinit acpi_processor_start(struct acpi_device *device)
 		return 0;
 	}
 
-	BUG_ON((pr->id >= nr_cpu_ids) || (pr->id < 0));
+	BUG_ON((pr->id >= nr_cpu_ids) || ((unsigned long)pr->id < 0));
 
 	/*
 	 * Buggy BIOS check
--
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