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| author | Benjamin LaHaise <bcrl@linux.intel.com> | 2005-08-10 14:16:04 -0700 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2005-08-29 15:56:38 -0700 |
| commit | 07dc3f0718d2c88c3094a0aadeeb4744effc5439 (patch) | |
| tree | d0bb49ac931db8ad0d5887da75193b42bc00e95f | |
| parent | cef07fd6029c20f95571d09cefce45ee3276a920 (diff) | |
| download | lwn-07dc3f0718d2c88c3094a0aadeeb4744effc5439.tar.gz lwn-07dc3f0718d2c88c3094a0aadeeb4744effc5439.zip | |
[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>
| -rw-r--r-- | net/socket.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/net/socket.c b/net/socket.c index 6f2a17881972..5f76ab8a1594 100644 --- 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 *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; |