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 <[email protected]> Cc: Matt Mackall <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
neviim · Jun 6, 2008 · bbcdac0 · bbcdac0
1 parent a4fa7ef
commit bbcdac0
Showing 1 changed file with 1 addition and 1 deletion.
diff --git 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;