linux-kernel - [PATCH 2/4] pagemap: Return map count, not reference count, in /proc/kpagecount. (v2 of series)

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Message-ID: <4ca0a85e0806051139q28d70661w569a036f54dcf89b@mail.gmail.com>
Date:	Thu, 5 Jun 2008 14:39:25 -0400
From:	"Thomas Tuttle" <ttuttle@...gle.com>
To:	mpm@...enic.com, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 2/4] pagemap: Return map count, not reference count, in /proc/kpagecount. (v2 of series)

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
---
 fs/proc/proc_misc.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/fs/proc/proc_misc.c b/fs/proc/proc_misc.c
index 32dc14c..5a16090 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;
--
1.5.3.6
--
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