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>
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@ -726,7 +726,7 @@ static ssize_t kpagecount_read(struct file *file, char __user *buf,
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if (!ppage)
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pcount = 0;
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else
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pcount = atomic_read(&ppage->_count);
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pcount = page_mapcount(ppage);
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if (put_user(pcount, out++)) {
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ret = -EFAULT;
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