linux-kernel - Re: [PATCH 03/52] [microblaze] Cpuinfo handling

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Message-ID: <Pine.LNX.4.64.0801271352510.1185@fbirervta.pbzchgretzou.qr>
Date:	Sun, 27 Jan 2008 13:55:50 +0100 (CET)
From:	Jan Engelhardt <jengelh@...putergmbh.de>
To:	monstr@...str.eu
cc:	linux-kernel@...r.kernel.org, stephen.neuendorffer@...inx.com,
	john.williams@...alogix.com, microblaze-uclinux@...e.uq.edu.au,
	microblaze <microblaze@...alhost.localdomain.monstr.eu>
Subject: Re: [PATCH 03/52] [microblaze] Cpuinfo handling


On Jan 24 2008 16:03, monstr@...str.eu wrote:
>+
>+static char family_string[] = CONFIG_XILINX_MICROBLAZE0_FAMILY;
>+static char cpu_ver_string[] = CONFIG_XILINX_MICROBLAZE0_HW_VER;
>+
I have not checked - can mark these const?



>--- /dev/null
>+++ b/arch/microblaze/kernel/cpu/cpuinfo.c
>+
>+static struct cpuinfo the_cpuinfo;
>+struct cpuinfo *cpuinfo = &the_cpuinfo;

Why is this indirection needed?

>+static struct cpu_ver_key the_cpu_ver_lookup[] = {
        ^const?

>+	/* These key value are as per MBV field in PVR0 */
>+	{"5.00.a", 0x01},
>+	{"5.00.b", 0x02},
>+	{"5.00.c", 0x03},
>+	{"6.00.a", 0x04},
>+	{"6.00.b", 0x06},
>+	{"7.00.a", 0x05},
>+	/* FIXME There is no keycode defined in MBV for these versions */
>+	{"2.10.a", 0x10},
>+	{"3.00.a", 0x20},
>+	{"4.00.a", 0x30},
>+	{"4.00.b", 0x40},
>+	{NULL, 0},
>+};
>+struct cpu_ver_key *cpu_ver_lookup =
>+	(struct cpu_ver_key *) the_cpu_ver_lookup;

Again an indirection. And the case, you guessed it, is redundant
(check other code too).

>+/*
>+ * FIXME Not sure if the actual key is defined by Xilinx in the PVR
>+ */
>+static struct family_string_key the_family_string_lookup[] = {
const?

>+	{"virtex2", 0x4},
>+	{"virtex2pro", 0x5},
>+	{"spartan3", 0x6},
>+	{"virtex4", 0x7},
>+	{"virtex5", 0x8},
>+	{"spartan3e", 0x9},
>+	{"spartan3a", 0xa},
>+	{"spartan3an", 0xb},
>+	/* FIXME There is no key code defined for spartan2 */
>+	{"spartan2", 0xf0},
>+	{NULL, 0},
>+};
>+struct family_string_key *family_string_lookup =
>+	(struct family_string_key *) the_family_string_lookup;

Dito.


>+#ifndef _ASM_CPUINFO_H
>+#define _ASM_CPUINFO_H
>+
>+#include <asm/prom.h>
>+
>+extern unsigned long loops_per_jiffy;
>+
>+/* CPU Version and FPGA Family code conversion table type */
>+struct cpu_ver_key {
>+	char *s;
const char *s; if you never modify s.

>+	unsigned k;
>+};
>+
>+struct family_string_key {
>+	char *s;
Dito.

>+	unsigned k;
>+};
>+
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