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authorAlexey Dobriyan <adobriyan@openvz.org>2007-02-13 13:26:23 +0100
committerAndi Kleen <andi@basil.nowhere.org>2007-02-13 13:26:23 +0100
commitd958f143329e685d114725b64fe6bef22994c74c (patch)
tree2e9c8f33d8d899e820cc8202ceca476e62d536bb
parentedf8dd36b53fdd558bc9a8ac5be793d27e110f90 (diff)
[PATCH] i386: use smp_call_function_single()
It will execute rdmsr and wrmsr only on the cpu we need. Signed-off-by: Alexey Dobriyan <adobriyan@openvz.org> Signed-off-by: Andi Kleen <ak@suse.de>
-rw-r--r--arch/i386/kernel/msr.c13
1 files changed, 4 insertions, 9 deletions
diff --git a/arch/i386/kernel/msr.c b/arch/i386/kernel/msr.c
index 4e14264f392..bcaa6e9b619 100644
--- a/arch/i386/kernel/msr.c
+++ b/arch/i386/kernel/msr.c
@@ -68,7 +68,6 @@ static inline int rdmsr_eio(u32 reg, u32 *eax, u32 *edx)
#ifdef CONFIG_SMP
struct msr_command {
- int cpu;
int err;
u32 reg;
u32 data[2];
@@ -78,16 +77,14 @@ static void msr_smp_wrmsr(void *cmd_block)
{
struct msr_command *cmd = (struct msr_command *)cmd_block;
- if (cmd->cpu == smp_processor_id())
- cmd->err = wrmsr_eio(cmd->reg, cmd->data[0], cmd->data[1]);
+ cmd->err = wrmsr_eio(cmd->reg, cmd->data[0], cmd->data[1]);
}
static void msr_smp_rdmsr(void *cmd_block)
{
struct msr_command *cmd = (struct msr_command *)cmd_block;
- if (cmd->cpu == smp_processor_id())
- cmd->err = rdmsr_eio(cmd->reg, &cmd->data[0], &cmd->data[1]);
+ cmd->err = rdmsr_eio(cmd->reg, &cmd->data[0], &cmd->data[1]);
}
static inline int do_wrmsr(int cpu, u32 reg, u32 eax, u32 edx)
@@ -99,12 +96,11 @@ static inline int do_wrmsr(int cpu, u32 reg, u32 eax, u32 edx)
if (cpu == smp_processor_id()) {
ret = wrmsr_eio(reg, eax, edx);
} else {
- cmd.cpu = cpu;
cmd.reg = reg;
cmd.data[0] = eax;
cmd.data[1] = edx;
- smp_call_function(msr_smp_wrmsr, &cmd, 1, 1);
+ smp_call_function_single(cpu, msr_smp_wrmsr, &cmd, 1, 1);
ret = cmd.err;
}
preempt_enable();
@@ -120,10 +116,9 @@ static inline int do_rdmsr(int cpu, u32 reg, u32 * eax, u32 * edx)
if (cpu == smp_processor_id()) {
ret = rdmsr_eio(reg, eax, edx);
} else {
- cmd.cpu = cpu;
cmd.reg = reg;
- smp_call_function(msr_smp_rdmsr, &cmd, 1, 1);
+ smp_call_function_single(cpu, msr_smp_rdmsr, &cmd, 1, 1);
*eax = cmd.data[0];
*edx = cmd.data[1];