x86: mark read_crX() asm code as volatile

[platform/adaptation/renesas_rcar/renesas_kernel.git] / include / asm-x86 / system_64.h

diff --git a/include/asm-x86/system_64.h b/include/asm-x86/system_64.h
index 5022aec..fb4bcf9 100644 (file)
--- a/include/asm-x86/system_64.h
+++ b/include/asm-x86/system_64.h
@@ -85,7 +85,7 @@ static inline void write_cr0(unsigned long val)
 static inline unsigned long read_cr2(void)
 {
        unsigned long cr2;
-       asm("movq %%cr2,%0" : "=r" (cr2));
+       asm volatile("movq %%cr2,%0" : "=r" (cr2));
        return cr2;
 }
 
@@ -97,7 +97,7 @@ static inline void write_cr2(unsigned long val)
 static inline unsigned long read_cr3(void)
 { 
        unsigned long cr3;
-       asm("movq %%cr3,%0" : "=r" (cr3));
+       asm volatile("movq %%cr3,%0" : "=r" (cr3));
        return cr3;
 }
 
@@ -109,7 +109,7 @@ static inline void write_cr3(unsigned long val)
 static inline unsigned long read_cr4(void)
 { 
        unsigned long cr4;
-       asm("movq %%cr4,%0" : "=r" (cr4));
+       asm volatile("movq %%cr4,%0" : "=r" (cr4));
        return cr4;
 }
 
@@ -121,7 +121,7 @@ static inline void write_cr4(unsigned long val)
 static inline unsigned long read_cr8(void)
 {
        unsigned long cr8;
-       asm("movq %%cr8,%0" : "=r" (cr8));
+       asm volatile("movq %%cr8,%0" : "=r" (cr8));
        return cr8;
 }