1 files changed, 7 insertions, 44 deletions

diff --git a/fs/proc/base.c b/fs/proc/base.c
index 33537487f5ab..c59852b38787 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -88,10 +88,6 @@
  *      in /proc for a task before it execs a suid executable.
  */
 
-
-/* Worst case buffer size needed for holding an integer. */
-#define PROC_NUMBUF 13
-
 struct pid_entry {
         char *name;
         int len;
@@ -787,7 +783,7 @@ out_no_task:
 }
 #endif
 
-static loff_t mem_lseek(struct file * file, loff_t offset, int orig)
+loff_t mem_lseek(struct file *file, loff_t offset, int orig)
 {
         switch (orig) {
         case 0:
@@ -935,42 +931,6 @@ static const struct file_operations proc_oom_adjust_operations = {
         .write          = oom_adjust_write,
 };
 
-#ifdef CONFIG_MMU
-static ssize_t clear_refs_write(struct file *file, const char __user *buf,
-                                size_t count, loff_t *ppos)
-{
-        struct task_struct *task;
-        char buffer[PROC_NUMBUF], *end;
-        struct mm_struct *mm;
-
-        memset(buffer, 0, sizeof(buffer));
-        if (count > sizeof(buffer) - 1)
-                count = sizeof(buffer) - 1;
-        if (copy_from_user(buffer, buf, count))
-                return -EFAULT;
-        if (!simple_strtol(buffer, &end, 0))
-                return -EINVAL;
-        if (*end == '\n')
-                end++;
-        task = get_proc_task(file->f_path.dentry->d_inode);
-        if (!task)
-                return -ESRCH;
-        mm = get_task_mm(task);
-        if (mm) {
-                clear_refs_smap(mm);
-                mmput(mm);
-        }
-        put_task_struct(task);
-        if (end - buffer == 0)
-                return -EIO;
-        return end - buffer;
-}
-
-static struct file_operations proc_clear_refs_operations = {
-        .write          = clear_refs_write,
-};
-#endif
-
 #ifdef CONFIG_AUDITSYSCALL
 #define TMPBUFLEN 21
 static ssize_t proc_loginuid_read(struct file * file, char __user * buf,
@@ -2289,9 +2249,10 @@ static const struct pid_entry tgid_base_stuff[] = {
         LNK("exe",        exe),
         REG("mounts",     S_IRUGO, mounts),
         REG("mountstats", S_IRUSR, mountstats),
-#ifdef CONFIG_MMU
+#ifdef CONFIG_PROC_PAGE_MONITOR
         REG("clear_refs", S_IWUSR, clear_refs),
         REG("smaps",      S_IRUGO, smaps),
+        REG("pagemap",    S_IRUSR, pagemap),
 #endif
 #ifdef CONFIG_SECURITY
         DIR("attr",       S_IRUGO|S_IXUGO, attr_dir),
@@ -2360,7 +2321,8 @@ static void proc_flush_task_mnt(struct vfsmount *mnt, pid_t pid, pid_t tgid)
         name.len = snprintf(buf, sizeof(buf), "%d", pid);
         dentry = d_hash_and_lookup(mnt->mnt_root, &name);
         if (dentry) {
-                shrink_dcache_parent(dentry);
+                if (!(current->flags & PF_EXITING))
+                        shrink_dcache_parent(dentry);
                 d_drop(dentry);
                 dput(dentry);
         }
@@ -2617,9 +2579,10 @@ static const struct pid_entry tid_base_stuff[] = {
         LNK("root",      root),
         LNK("exe",       exe),
         REG("mounts",    S_IRUGO, mounts),
-#ifdef CONFIG_MMU
+#ifdef CONFIG_PROC_PAGE_MONITOR
         REG("clear_refs", S_IWUSR, clear_refs),
         REG("smaps",     S_IRUGO, smaps),
+        REG("pagemap",    S_IRUSR, pagemap),
 #endif
 #ifdef CONFIG_SECURITY
         DIR("attr",      S_IRUGO|S_IXUGO, attr_dir),