tree d0bb49ac931db8ad0d5887da75193b42bc00e95f
parent cef07fd6029c20f95571d09cefce45ee3276a920
author Benjamin LaHaise <[EMAIL PROTECTED]> Thu, 11 Aug 2005 04:16:04 -0700
committer David S. Miller <[EMAIL PROTECTED]> Tue, 30 Aug 2005 05:56:38 -0700
[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 <[EMAIL PROTECTED]>
Signed-off-by: David S. Miller <[EMAIL PROTECTED]>
net/socket.c | 4 ++++
1 files changed, 4 insertions(+)
diff --git a/net/socket.c b/net/socket.c
--- a/net/socket.c
+++ b/net/socket.c
@@ -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
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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