Messages in this thread Patch in this message | | | From | davej@redhat ... | Subject | Restore 2.4 MTRR feature. | Date | Fri, 23 Jan 2004 06:35:25 +0000 |
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If the CPU doesn't support MTRRs, don't create a /proc/mtrr
Dave
diff -urpN --exclude-from=/home/davej/.exclude bk-linus/arch/i386/kernel/cpu/mtrr/if.c linux-2.5/arch/i386/kernel/cpu/mtrr/if.c --- bk-linus/arch/i386/kernel/cpu/mtrr/if.c 2003-09-29 19:45:18.000000000 +0100 +++ linux-2.5/arch/i386/kernel/cpu/mtrr/if.c 2003-11-27 17:04:42.000000000 +0000 @@ -352,6 +352,14 @@ static int mtrr_seq_show(struct seq_file static int __init mtrr_if_init(void) { + struct cpuinfo_x86 *c = &boot_cpu_data; + + if ((!cpu_has(c, X86_FEATURE_MTRR)) && + (!cpu_has(c, X86_FEATURE_K6_MTRR)) && + (!cpu_has(c, X86_FEATURE_CYRIX_ARR)) && + (!cpu_has(c, X86_FEATURE_CENTAUR_MCR))) + return -ENODEV; + proc_root_mtrr = create_proc_entry("mtrr", S_IWUSR | S_IRUGO, &proc_root); if (proc_root_mtrr) { - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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