patch-2.3.8 linux/arch/alpha/mm/fault.c

• Lines: 83
• Date: Tue Jun 22 10:46:52 1999
• Orig file: v2.3.7/linux/arch/alpha/mm/fault.c
• Orig date: Wed Sep 9 08:56:58 1998

diff -u --recursive --new-file v2.3.7/linux/arch/alpha/mm/fault.c linux/arch/alpha/mm/fault.c
@@ -7,6 +7,7 @@
 #include <linux/sched.h>
 #include <linux/kernel.h>
 #include <linux/mm.h>
+#include <asm/io.h>
 
 #define __EXTERN_INLINE inline
 #include <asm/mmu_context.h>
@@ -28,65 +29,22 @@
 extern void die_if_kernel(char *,struct pt_regs *,long, unsigned long *);
 
 
-#ifdef __SMP__
-unsigned long last_asn[NR_CPUS] = { /* gag */
-  ASN_FIRST_VERSION +  (0 << WIDTH_HARDWARE_ASN),
-  ASN_FIRST_VERSION +  (1 << WIDTH_HARDWARE_ASN),
-  ASN_FIRST_VERSION +  (2 << WIDTH_HARDWARE_ASN),
-  ASN_FIRST_VERSION +  (3 << WIDTH_HARDWARE_ASN),
-  ASN_FIRST_VERSION +  (4 << WIDTH_HARDWARE_ASN),
-  ASN_FIRST_VERSION +  (5 << WIDTH_HARDWARE_ASN),
-  ASN_FIRST_VERSION +  (6 << WIDTH_HARDWARE_ASN),
-  ASN_FIRST_VERSION +  (7 << WIDTH_HARDWARE_ASN),
-  ASN_FIRST_VERSION +  (8 << WIDTH_HARDWARE_ASN),
-  ASN_FIRST_VERSION +  (9 << WIDTH_HARDWARE_ASN),
-  ASN_FIRST_VERSION + (10 << WIDTH_HARDWARE_ASN),
-  ASN_FIRST_VERSION + (11 << WIDTH_HARDWARE_ASN),
-  ASN_FIRST_VERSION + (12 << WIDTH_HARDWARE_ASN),
-  ASN_FIRST_VERSION + (13 << WIDTH_HARDWARE_ASN),
-  ASN_FIRST_VERSION + (14 << WIDTH_HARDWARE_ASN),
-  ASN_FIRST_VERSION + (15 << WIDTH_HARDWARE_ASN),
-  ASN_FIRST_VERSION + (16 << WIDTH_HARDWARE_ASN),
-  ASN_FIRST_VERSION + (17 << WIDTH_HARDWARE_ASN),
-  ASN_FIRST_VERSION + (18 << WIDTH_HARDWARE_ASN),
-  ASN_FIRST_VERSION + (19 << WIDTH_HARDWARE_ASN),
-  ASN_FIRST_VERSION + (20 << WIDTH_HARDWARE_ASN),
-  ASN_FIRST_VERSION + (21 << WIDTH_HARDWARE_ASN),
-  ASN_FIRST_VERSION + (22 << WIDTH_HARDWARE_ASN),
-  ASN_FIRST_VERSION + (23 << WIDTH_HARDWARE_ASN),
-  ASN_FIRST_VERSION + (24 << WIDTH_HARDWARE_ASN),
-  ASN_FIRST_VERSION + (25 << WIDTH_HARDWARE_ASN),
-  ASN_FIRST_VERSION + (26 << WIDTH_HARDWARE_ASN),
-  ASN_FIRST_VERSION + (27 << WIDTH_HARDWARE_ASN),
-  ASN_FIRST_VERSION + (28 << WIDTH_HARDWARE_ASN),
-  ASN_FIRST_VERSION + (29 << WIDTH_HARDWARE_ASN),
-  ASN_FIRST_VERSION + (30 << WIDTH_HARDWARE_ASN),
-  ASN_FIRST_VERSION + (31 << WIDTH_HARDWARE_ASN)
-};
-#else
-unsigned long asn_cache = ASN_FIRST_VERSION;
-#endif /* __SMP__ */
-
 /*
- * Select a new ASN for a task.
+ * Force a new ASN for a task.
  */
 
+#ifndef __SMP__
+unsigned long last_asn = ASN_FIRST_VERSION;
+#endif
+
 void
 get_new_mmu_context(struct task_struct *p, struct mm_struct *mm)
 {
-	unsigned long asn = asn_cache;
-
-	if ((asn & HARDWARE_ASN_MASK) < MAX_ASN)
-		++asn;
-	else {
-		tbiap();
-		imb();
-		asn = (asn & ~HARDWARE_ASN_MASK) + ASN_FIRST_VERSION;
-	}
-	asn_cache = asn;
-	mm->context = asn;			/* full version + asn */
-	p->tss.asn = asn & HARDWARE_ASN_MASK;	/* just asn */
+	unsigned long new = __get_new_mmu_context(p, mm);
+	p->tss.mm_context = new;
+	p->tss.asn = new & HARDWARE_ASN_MASK;
 }
+
 
 /*
  * This routine handles page faults.  It determines the address,