[RFC][PATCH 2/6] x86/power: Inline write_cr[04]()

[Peter Zijlstra <peterz@xxxxxxxxxxxxx>]

Since we can't do CALL/RET until GS is restored and CR[04] pinning is
of dubious value in this code path, simply write the stored values.

Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
---
 arch/x86/power/cpu.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/arch/x86/power/cpu.c
+++ b/arch/x86/power/cpu.c
@@ -208,11 +208,11 @@ static void notrace __restore_processor_
 #else
 /* CONFIG X86_64 */
        native_wrmsrl(MSR_EFER, ctxt->efer);
-       native_write_cr4(ctxt->cr4);
+       asm volatile("mov %0,%%cr4": "+r" (ctxt->cr4) : : "memory");
 #endif
        native_write_cr3(ctxt->cr3);
        native_write_cr2(ctxt->cr2);
-       native_write_cr0(ctxt->cr0);
+       asm volatile("mov %0,%%cr0": "+r" (ctxt->cr0) : : "memory");
 
        /* Restore the IDT. */
        native_load_idt(&ctxt->idt);