[ARM] 4764/1: [AT91] AT91CAP9 core support

[linux-2.6-omap-h63xx.git] / include / asm-arm / mmu_context.h

diff --git a/include/asm-arm/mmu_context.h b/include/asm-arm/mmu_context.h
index d1a65b1edcaab236f0a65706380f60e85d26fc04..6913d02ca5d61538e6b6a0be9f036993533c3424 100644 (file)
--- a/include/asm-arm/mmu_context.h
+++ b/include/asm-arm/mmu_context.h
@@ -16,10 +16,11 @@
 #include <linux/compiler.h>
 #include <asm/cacheflush.h>
 #include <asm/proc-fns.h>
+#include <asm-generic/mm_hooks.h>
 
 void __check_kvm_seq(struct mm_struct *mm);
 
-#if __LINUX_ARM_ARCH__ >= 6
+#ifdef CONFIG_CPU_HAS_ASID
 
 /*
  * On ARMv6, we have the following structure in the Context ID:
@@ -35,8 +36,9 @@ void __check_kvm_seq(struct mm_struct *mm);
  * The context ID is used by debuggers and trace logic, and
  * should be unique within all running processes.
  */
-#define ASID_BITS      8
-#define ASID_MASK      ((~0) << ASID_BITS)
+#define ASID_BITS              8
+#define ASID_MASK              ((~0) << ASID_BITS)
+#define ASID_FIRST_VERSION     (1 << ASID_BITS)
 
 extern unsigned int cpu_last_asid;
 
@@ -95,8 +97,7 @@ switch_mm(struct mm_struct *prev, struct mm_struct *next,
 #ifdef CONFIG_MMU
        unsigned int cpu = smp_processor_id();
 
-       if (prev != next) {
-               cpu_set(cpu, next->cpu_vm_mask);
+       if (!cpu_test_and_set(cpu, next->cpu_vm_mask) || prev != next) {
                check_context(next);
                cpu_switch_mm(next->pgd, next);
                if (cache_is_vivt())