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pagemap: return map count, not reference count, in /proc/kpagecount

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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>
This commit is contained in:
Thomas Tuttle
2008-06-05 22:46:58 -07:00
committed by Linus Torvalds
parent a4fa7ef037
commit bbcdac0c20
1 changed files with 1 additions and 1 deletions
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2
fs/proc/proc_misc.c
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@@ -726,7 +726,7 @@ static ssize_t kpagecount_read(struct file *file, char __user *buf,
if (!ppage) if (!ppage)
pcount = 0; pcount = 0;
else else
pcount = atomic_read(&ppage->_count); pcount = page_mapcount(ppage);
if (put_user(pcount, out++)) { if (put_user(pcount, out++)) {
ret = -EFAULT; ret = -EFAULT;