mm: per-thread vma caching

[platform/adaptation/renesas_rcar/renesas_kernel.git] / kernel / fork.c

diff --git a/kernel/fork.c b/kernel/fork.c
index 9e643f8..e2c6853 100644 (file)
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -28,6 +28,8 @@
 #include <linux/mman.h>
 #include <linux/mmu_notifier.h>
 #include <linux/fs.h>
+#include <linux/mm.h>
+#include <linux/vmacache.h>
 #include <linux/nsproxy.h>
 #include <linux/capability.h>
 #include <linux/cpu.h>
@@ -363,7 +365,7 @@ static int dup_mmap(struct mm_struct *mm, struct mm_struct *oldmm)
 
        mm->locked_vm = 0;
        mm->mmap = NULL;
-       mm->mmap_cache = NULL;
+       mm->vmacache_seqnum = 0;
        mm->map_count = 0;
        cpumask_clear(mm_cpumask(mm));
        mm->mm_rb = RB_ROOT;
@@ -876,6 +878,9 @@ static int copy_mm(unsigned long clone_flags, struct task_struct *tsk)
        if (!oldmm)
                return 0;
 
+       /* initialize the new vmacache entries */
+       vmacache_flush(tsk);
+
        if (clone_flags & CLONE_VM) {
                atomic_inc(&oldmm->mm_users);
                mm = oldmm;