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 <>
Signed-off-by: default avatarDavid S. Miller <>
parent cef07fd6
......@@ -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;
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