mm: per-thread vma caching

[platform/adaptation/renesas_rcar/renesas_kernel.git] / fs / exec.c

diff --git a/fs/exec.c b/fs/exec.c
index 3d78fcc..ea4449d 100644 (file)
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -26,6 +26,7 @@
 #include <linux/file.h>
 #include <linux/fdtable.h>
 #include <linux/mm.h>
+#include <linux/vmacache.h>
 #include <linux/stat.h>
 #include <linux/fcntl.h>
 #include <linux/swap.h>
@@ -654,10 +655,10 @@ int setup_arg_pages(struct linux_binprm *bprm,
        unsigned long rlim_stack;
 
 #ifdef CONFIG_STACK_GROWSUP
-       /* Limit stack size to 1GB */
+       /* Limit stack size */
        stack_base = rlimit_max(RLIMIT_STACK);
-       if (stack_base > (1 << 30))
-               stack_base = 1 << 30;
+       if (stack_base > STACK_SIZE_MAX)
+               stack_base = STACK_SIZE_MAX;
 
        /* Make sure we didn't let the argument array grow too large. */
        if (vma->vm_end - vma->vm_start > stack_base)
@@ -820,7 +821,7 @@ EXPORT_SYMBOL(read_code);
 static int exec_mmap(struct mm_struct *mm)
 {
        struct task_struct *tsk;
-       struct mm_struct * old_mm, *active_mm;
+       struct mm_struct *old_mm, *active_mm;
 
        /* Notify parent that we're no longer interested in the old VM */
        tsk = current;
@@ -846,6 +847,8 @@ static int exec_mmap(struct mm_struct *mm)
        tsk->mm = mm;
        tsk->active_mm = mm;
        activate_mm(active_mm, mm);
+       tsk->mm->vmacache_seqnum = 0;
+       vmacache_flush(tsk);
        task_unlock(tsk);
        if (old_mm) {
                up_read(&old_mm->mmap_sem);