[PATCH 3/4] proc: Clean up mmaps when a proc file is removed.

From: Eric W. Biederman
Date: Fri Sep 04 2009 - 15:27:34 EST

If a file such as /proc/bus/pci/*/* is mmaped and the underlying device
is hotunplugedd we can potentially run into all kinds of ugly things.

So implement unmap on remove by calling revoke_file_mappings.

Signed-off-by: Eric W. Biederman <ebiederm@xxxxxxxxxxxxxxxxxx>
fs/proc/generic.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/fs/proc/generic.c b/fs/proc/generic.c
index fa678ab..42ce941 100644
--- a/fs/proc/generic.c
+++ b/fs/proc/generic.c
@@ -20,6 +20,7 @@
#include <linux/bitops.h>
#include <linux/spinlock.h>
#include <linux/completion.h>
+#include <linux/mm.h>
#include <asm/uaccess.h>

#include "internal.h"
@@ -833,6 +834,7 @@ continue_removing:
pdeo = list_first_entry(&de->pde_openers, struct pde_opener, lh);
+ revoke_file_mappings(pdeo->file);
pdeo->release(pdeo->inode, pdeo->file);

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