From 597536e3d11eeade45ace0cdeae4082df4ec6602 Mon Sep 17 00:00:00 2001
From: Andrew Morton <akpm@osdl.org>
Date: Thu, 14 Aug 2003 10:24:51 -0700
Subject: [PATCH] [PATCH] access_process_vm() needs to dirty the page

If POKETEXT modifies the page it needs to tell the VM about it.
---
 kernel/ptrace.c | 1 +
 mm/filemap.c    | 3 +++
 2 files changed, 4 insertions(+)

diff --git a/kernel/ptrace.c b/kernel/ptrace.c
index 34527fc3df121..cc3047d5562bd 100644
--- a/kernel/ptrace.c
+++ b/kernel/ptrace.c
@@ -189,6 +189,7 @@ int access_process_vm(struct task_struct *tsk, unsigned long addr, void *buf, in
 		if (write) {
 			memcpy(maddr + offset, buf, bytes);
 			flush_icache_user_range(vma, page, addr, bytes);
+			set_page_dirty_lock(page);
 		} else {
 			memcpy(buf, maddr + offset, bytes);
 		}
diff --git a/mm/filemap.c b/mm/filemap.c
index c2f190ea38fc2..8324f92b1c277 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -63,6 +63,9 @@
  *  ->mmap_sem
  *    ->i_shared_sem		(various places)
  *
+ *  ->mmap_sem
+ *    ->lock_page		(access_process_vm)
+ *
  *  ->inode_lock
  *    ->sb_lock			(fs/fs-writeback.c)
  *    ->mapping->page_lock	(__sync_single_inode)
-- 
2.53.0