tree 69d6d03af07645ea074a68433d24b2bf3ace9f22
parent 1fadee0c364572f2b2e098b34001fbaa82ee2e00
author Eric Dumazet <edumazet@google.com> 1412941694 -0700
committer David S. Miller <davem@davemloft.net> 1412969848 -0400

fm10k: fix race accessing page->_count

This is illegal to use atomic_set(&page->_count, 2) even if we 'own'
the page. Other entities in the kernel need to use get_page_unless_zero()
to get a reference to the page before testing page properties, so we could
loose a refcount increment.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>