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[NET]: Make use of ->private_data in sockfd_lookup 

Please consider the patch below which makes use of file->private_data to
store the pointer to the socket, which avoids touching several unused
cachelines in the dentry and inode in sockfd_lookup.

Signed-off-by: Benjamin LaHaise <bcrl@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Benjamin LaHaise 2005-08-10 14:16:04 -07:00 committed by David S. Miller
parent cef07fd602
commit 07dc3f0718
1 changed files with 4 additions and 0 deletions
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4
net/socket.c
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@ -404,6 +404,7 @@ int sock_map_fd(struct socket *sock)
file->f_mode = FMODE_READ | FMODE_WRITE;
file->f_flags = O_RDWR;
file->f_pos = 0;
file->private_data = sock;
fd_install(fd, file);
}
@ -436,6 +437,9 @@ struct socket *sockfd_lookup(int fd, int *err)
return NULL;
}
if (file->f_op == &socket_file_ops)
return file->private_data; /* set in sock_map_fd */
inode = file->f_dentry->d_inode;
if (!S_ISSOCK(inode->i_mode)) {
*err = -ENOTSOCK;