From: Eric Dumazet <dada1@cosmosbay.com>
Date: Thu, 8 Feb 2007 22:59:57 +0000 (-0800)
Subject: [NET]: cleanup sock_from_file()
X-Git-Tag: v2.6.21-rc1~83^2~65^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=23bb80d2158cf4421fe239d788fd53cafb151050;p=pandora-kernel.git

[NET]: cleanup sock_from_file()

I believe dead code from sock_from_file() can be cleaned up.

All sockets are now built using sock_attach_fd(), that puts the 'sock' pointer
into file->private_data and &socket_file_ops into file->f_op

I could not find a place where file->private_data could be set to NULL,
keeping opened the file.

So to get 'sock' from a 'file' pointer, either :

- This is a socket file (f_op == &socket_file_ops), and we can directly get
'sock' from private_data.
- This is not a socket, we return -ENOTSOCK and dont even try to find a socket
via dentry/inode :)

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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