From: Pavel Machek <pavel-+ZI9xUNit7I@public.gmane.org>
To: ACPI mailing list
<acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org>,
Rusty trivial patch monkey Russell
<trivial-8n+1lVoiYb80n/F98K4Iww@public.gmane.org>
Subject: Teach acpi how to get power-of-two
Date: Sat, 28 Feb 2004 16:44:44 +0100 [thread overview]
Message-ID: <20040228154444.GA10309@elf.ucw.cz> (raw)
Hi!
I do not know why ACPI people did this... computing 1<<x using lookup
table. Its not even funny. Please apply,
Pavel
--- tmp/linux/drivers/acpi/processor.c 2004-02-20 12:29:21.000000000 +0100
+++ linux/drivers/acpi/processor.c 2004-02-28 15:30:52.000000000 +0100
@@ -66,9 +66,6 @@
#define C2_OVERHEAD 4 /* 1us (3.579 ticks per us) */
#define C3_OVERHEAD 4 /* 1us (3.579 ticks per us) */
-
-const u32 POWER_OF_2[] = {1,2,4,8,16,32,64};
-
#define ACPI_PROCESSOR_LIMIT_USER 0
#define ACPI_PROCESSOR_LIMIT_THERMAL 1
@@ -1489,7 +1486,7 @@
return_VALUE(0);
}
- pr->throttling.state_count = POWER_OF_2[acpi_fadt.duty_width];
+ pr->throttling.state_count = 1<<acpi_fadt.duty_width;
/*
* Compute state values. Note that throttling displays a linear power/
--
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[Johanka's followup: and *two* hearts?]
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reply other threads:[~2004-02-28 15:44 UTC|newest]
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