[PATCH] i386: use smp_call_function_single()

It will execure cpuid only on the cpu we need.

Signed-off-by: Alexey Dobriyan <adobriyan@openvz.org>
Signed-off-by: Andi Kleen <ak@suse.de>

diff --git a/arch/i386/kernel/cpuid.c b/arch/i386/kernel/cpuid.c
index 4da75fa3208d8842f92255d82678331183215c72..eeae0d992337dd3e7c543e683adcc45233abb697 100644 (file)
--- a/arch/i386/kernel/cpuid.c
+++ b/arch/i386/kernel/cpuid.c
@@ -48,7 +48,6 @@ static struct class *cpuid_class;
 #ifdef CONFIG_SMP
 
 struct cpuid_command {
-       int cpu;
        u32 reg;
        u32 *data;
 };
@@ -57,8 +56,7 @@ static void cpuid_smp_cpuid(void *cmd_block)
 {
        struct cpuid_command *cmd = (struct cpuid_command *)cmd_block;
 
-       if (cmd->cpu == smp_processor_id())
-               cpuid(cmd->reg, &cmd->data[0], &cmd->data[1], &cmd->data[2],
+       cpuid(cmd->reg, &cmd->data[0], &cmd->data[1], &cmd->data[2],
                      &cmd->data[3]);
 }
 
@@ -70,11 +68,10 @@ static inline void do_cpuid(int cpu, u32 reg, u32 * data)
        if (cpu == smp_processor_id()) {
                cpuid(reg, &data[0], &data[1], &data[2], &data[3]);
        } else {
-               cmd.cpu = cpu;
                cmd.reg = reg;
                cmd.data = data;
 
-               smp_call_function(cpuid_smp_cpuid, &cmd, 1, 1);
+               smp_call_function_single(cpu, cpuid_smp_cpuid, &cmd, 1, 1);
        }
        preempt_enable();
 }