x86_64: Use read and write crX in .c files

This patch uses the read and write functions provided at system.h
for control registers instead of writting raw assembly over and
over again in .c files. Functions to manipulate cr2 and cr8 were
provided, as they were lacking.

Also, removed some extra space after closing brackets

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/arch/x86_64/mm/init.c b/arch/x86_64/mm/init.c
index 88678e82e23..2044fa961c0 100644
--- a/arch/x86_64/mm/init.c
+++ b/arch/x86_64/mm/init.c
@@ -383,7 +383,7 @@ void __meminit init_memory_mapping(unsigned long start, unsigned long end)
         } 
 
         if (!after_bootmem)
-                asm volatile("movq %%cr4,%0" : "=r" (mmu_cr4_features));
+                mmu_cr4_features = read_cr4();
         __flush_tlb_all();
 }