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Commit 3453c847 authored by Dave Jones's avatar Dave Jones
Browse files

[CPUFREQ] Remove unneeded errata workaround from p4-clockmod. 

This workaround unnecessarily cripples functionality to work
around an errata that doesn't seem possible to hit due to
us using the automatic clock throttling in the p4 mcheck code.

See http://lkml.org/lkml/2006/10/28/148

 for complete reasoning
and lack of disconsent.

Signed-off-by: default avatarDave Jones <davej@redhat.com>
parent 0142f9dc

arch/i386/kernel/cpu/cpufreq/p4-clockmod.c

+0 −9
Original line number Diff line number Diff line
@@ -51,7 +51,6 @@ enum { 




static int has_N44_O17_errata[NR_CPUS];

static int has_N60_errata[NR_CPUS];

static unsigned int stock_freq;

static struct cpufreq_driver p4clockmod_driver;

static unsigned int cpufreq_p4_get(unsigned int cpu);
@@ -224,12 +223,6 @@ static int cpufreq_p4_cpu_init(struct cpufreq_policy *policy) 
	case 0x0f12:

		has_N44_O17_errata[policy->cpu] = 1;

		dprintk("has errata -- disabling low frequencies\n");

		break;



	case 0x0f29:

		has_N60_errata[policy->cpu] = 1;

		dprintk("has errata -- disabling frequencies lower than 2ghz\n");

		break;

	}



	/* get max frequency */
@@ -241,8 +234,6 @@ static int cpufreq_p4_cpu_init(struct cpufreq_policy *policy) 
	for (i=1; (p4clockmod_table[i].frequency != CPUFREQ_TABLE_END); i++) {

		if ((i<2) && (has_N44_O17_errata[policy->cpu]))

			p4clockmod_table[i].frequency = CPUFREQ_ENTRY_INVALID;

		else if (has_N60_errata[policy->cpu] && ((stock_freq * i)/8) < 2000000)

			p4clockmod_table[i].frequency = CPUFREQ_ENTRY_INVALID;

		else

			p4clockmod_table[i].frequency = (stock_freq * i)/8;

	}