From bbcdac0c20aa20d1daad41d9c138102b70e5aae4 Mon Sep 17 00:00:00 2001
From: Thomas Tuttle <ttuttle@google.com>
Date: Thu, 5 Jun 2008 22:46:58 -0700
Subject: [PATCH] pagemap: return map count, not reference count, in
/proc/kpagecount
Since pagemap is all about examining pages mapped into processes' memory
spaces, it makes sense for kpagecount to return the map counts, not the
reference counts.
Signed-off-by: Thomas Tuttle <ttuttle@google.com>
Cc: Matt Mackall <mpm@selenic.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
fs/proc/proc_misc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/proc/proc_misc.c b/fs/proc/proc_misc.c
index 32dc14cd89005..5a16090a6d6e2 100644
--- a/fs/proc/proc_misc.c
+++ b/fs/proc/proc_misc.c
@@ -726,7 +726,7 @@ static ssize_t kpagecount_read(struct file *file, char __user *buf,
if (!ppage)
pcount = 0;
else
- pcount = atomic_read(&ppage->_count);
+ pcount = page_mapcount(ppage);
if (put_user(pcount, out++)) {
ret = -EFAULT;
--
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