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

[Thomas Tuttle]

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
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/