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Commit 07dc3f07 authored by Benjamin LaHaise's avatar Benjamin LaHaise Committed by David S. Miller
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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: default avatarBenjamin LaHaise <bcrl@linux.intel.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent cef07fd6

net/socket.c

+4 −0
Original line number Diff line number Diff line
@@ -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;