X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=include%2Fasm-i386%2Fsystem.h;h=399145a247f290580c53576a81c0f7ba94ee61e8;hb=f78cf0dc7b7b13d0550d1e02cf221b65969ff926;hp=772f85da1206af441de3d5df59892921931a8b51;hpb=70ac551651a2c5a234b703d9a495817f2ca09639;p=powerpc.git

diff --git a/include/asm-i386/system.h b/include/asm-i386/system.h
index 772f85da12..399145a247 100644
--- a/include/asm-i386/system.h
+++ b/include/asm-i386/system.h
@@ -54,23 +54,7 @@ __asm__ __volatile__ ("movw %%dx,%1\n\t" \
         ); } while(0)
 
 #define set_base(ldt,base) _set_base( ((char *)&(ldt)) , (base) )
-#define set_limit(ldt,limit) _set_limit( ((char *)&(ldt)) , ((limit)-1)>>12 )
-
-static inline unsigned long _get_base(char * addr)
-{
-	unsigned long __base;
-	__asm__("movb %3,%%dh\n\t"
-		"movb %2,%%dl\n\t"
-		"shll $16,%%edx\n\t"
-		"movw %1,%%dx"
-		:"=&d" (__base)
-		:"m" (*((addr)+2)),
-		 "m" (*((addr)+4)),
-		 "m" (*((addr)+7)));
-	return __base;
-}
-
-#define get_base(ldt) _get_base( ((char *)&(ldt)) )
+#define set_limit(ldt,limit) _set_limit( ((char *)&(ldt)) , ((limit)-1) )
 
 /*
  * Load a segment. Fall back on loading the zero
@@ -140,6 +124,19 @@ static inline unsigned long _get_base(char * addr)
 		:"=r" (__dummy)); \
 	__dummy; \
 })
+
+#define read_cr4_safe() ({			      \
+	unsigned int __dummy;			      \
+	/* This could fault if %cr4 does not exist */ \
+	__asm__("1: movl %%cr4, %0		\n"   \
+		"2:				\n"   \
+		".section __ex_table,\"a\"	\n"   \
+		".long 1b,2b			\n"   \
+		".previous			\n"   \
+		: "=r" (__dummy): "0" (0));	      \
+	__dummy;				      \
+})
+
 #define write_cr4(x) \
 	__asm__ __volatile__("movl %0,%%cr4": :"r" (x));
 #define stts() write_cr0(8 | read_cr0())
@@ -510,7 +507,7 @@ struct alt_instr {
 #define smp_rmb()	rmb()
 #define smp_wmb()	wmb()
 #define smp_read_barrier_depends()	read_barrier_depends()
-#define set_mb(var, value) do { xchg(&var, value); } while (0)
+#define set_mb(var, value) do { (void) xchg(&var, value); } while (0)
 #else
 #define smp_mb()	barrier()
 #define smp_rmb()	barrier()
@@ -551,6 +548,15 @@ void enable_hlt(void);
 extern int es7000_plat;
 void cpu_idle_wait(void);
 
+/*
+ * On SMP systems, when the scheduler does migration-cost autodetection,
+ * it needs a way to flush as much of the CPU's caches as possible:
+ */
+static inline void sched_cacheflush(void)
+{
+	wbinvd();
+}
+
 extern unsigned long arch_align_stack(unsigned long sp);
 
 #endif