Herbert Xu 905db44087 packet: Avoid lock_sock in mmap handler ... As the mmap handler gets called under mmap_sem, and we may grab mmap_sem elsewhere under the socket lock to access user data, we should avoid grabbing the socket lock in the mmap handler. Since the only thing we care about in the mmap handler is for pg_vec* to be invariant, i.e., to exclude packet_set_ring, we can achieve this by simply using a new mutex. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Tested-by: Martin MOKREJŠ <mmokrejs@ribosome.natur.cuni.cz> Signed-off-by: David S. Miller <davem@davemloft.net>		2009-01-30 14:13:49 -08:00
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af_packet.c	packet: Avoid lock_sock in mmap handler	2009-01-30 14:13:49 -08:00
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