maps4: move clear_refs code to task_mmu.c

This puts all the clear_refs code where it belongs and probably lets things
compile on MMU-less systems as well.

Signed-off-by: Matt Mackall <mpm@selenic.com>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Dave Hansen <haveblue@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 0 insertions, 40 deletions

diff --git a/fs/proc/base.c b/fs/proc/base.c
index 33537487f5ab..1bd646d3fe9a 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;
@@ -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,