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, 4 insertions, 4 deletions

diff --git a/arch/x86_64/kernel/process.c b/arch/x86_64/kernel/process.c
index 92fade4a62cf..e7ac629d4c46 100644
--- a/arch/x86_64/kernel/process.c
+++ b/arch/x86_64/kernel/process.c
@@ -342,10 +342,10 @@ void __show_regs(struct pt_regs * regs)
         rdmsrl(MSR_GS_BASE, gs); 
         rdmsrl(MSR_KERNEL_GS_BASE, shadowgs); 
 
-        asm("movq %%cr0, %0": "=r" (cr0));
-        asm("movq %%cr2, %0": "=r" (cr2));
-        asm("movq %%cr3, %0": "=r" (cr3));
-        asm("movq %%cr4, %0": "=r" (cr4));
+        cr0 = read_cr0();
+        cr2 = read_cr2();
+        cr3 = read_cr3();
+        cr4 = read_cr4();
 
         printk("FS:  %016lx(%04x) GS:%016lx(%04x) knlGS:%016lx\n", 
                fs,fsindex,gs,gsindex,shadowgs);