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, 2 insertions, 2 deletions

diff --git a/arch/x86_64/mm/fault.c b/arch/x86_64/mm/fault.c
index 5e9ac70c135e..327c9f2fa626 100644
--- a/arch/x86_64/mm/fault.c
+++ b/arch/x86_64/mm/fault.c
@@ -159,7 +159,7 @@ void dump_pagetable(unsigned long address)
         pmd_t *pmd;
         pte_t *pte;
 
-        asm("movq %%cr3,%0" : "=r" (pgd));
+        pgd = (pgd_t *)read_cr3();
 
         pgd = __va((unsigned long)pgd & PHYSICAL_PAGE_MASK); 
         pgd += pgd_index(address);
@@ -316,7 +316,7 @@ asmlinkage void __kprobes do_page_fault(struct pt_regs *regs,
         prefetchw(&mm->mmap_sem);
 
         /* get the address */
-        __asm__("movq %%cr2,%0":"=r" (address));
+        address = read_cr2();
 
         info.si_code = SEGV_MAPERR;