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x86/msr: Make rdmsrl_safe_on_cpu() scheduling safe as well

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When changing rdmsr_safe_on_cpu() to schedule, it was missed that
__rdmsr_safe_on_cpu() was also used by rdmsrl_safe_on_cpu()

Make rdmsrl_safe_on_cpu() a wrapper instead of copy/pasting the code which
was added for the completion handling.

Fixes: 07cde313b2 ("x86/msr: Allow rdmsr_safe_on_cpu() to schedule")
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Link: https://lkml.kernel.org/r/20180328032233.153055-1-edumazet@google.com
This commit is contained in:
Eric Dumazet 2018-03-27 20:22:33 -07:00 committed by Thomas Gleixner
parent 67bbd7a8d6
commit 9b9a51354c
1 changed files with 4 additions and 7 deletions
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11
arch/x86/lib/msr-smp.c
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@ -225,16 +225,13 @@ EXPORT_SYMBOL(wrmsrl_safe_on_cpu);
int rdmsrl_safe_on_cpu(unsigned int cpu, u32 msr_no, u64 *q)
{
u32 low, high;
int err;
struct msr_info rv;
memset(&rv, 0, sizeof(rv));
err = rdmsr_safe_on_cpu(cpu, msr_no, &low, &high);
*q = (u64)high << 32 | low;
rv.msr_no = msr_no;
err = smp_call_function_single(cpu, __rdmsr_safe_on_cpu, &rv, 1);
*q = rv.reg.q;
return err ? err : rv.err;
return err;
}
EXPORT_SYMBOL(rdmsrl_safe_on_cpu);