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authorEric Dumazet <edumazet@google.com>2014-10-10 15:48:17 +0400
committerDavid S. Miller <davem@davemloft.net>2014-10-10 23:37:28 +0400
commit98226208c8a1fe5834e92d827a2a1e8051a17943 (patch)
tree09bc0b1ebf516dcba2d21b93d98dc0e3d2bc3181 /net
parentec91698360b3818ff426488a1529811f7a7ab87f (diff)
downloadlinux-98226208c8a1fe5834e92d827a2a1e8051a17943.tar.xz
mlx4: fix race accessing page->_count
This is illegal to use atomic_set(&page->_count, ...) 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> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
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