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| author | Arnd Bergmann <arnd@arndb.de> | 2010-10-04 21:18:23 +0200 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2010-10-19 11:29:59 +0200 |
| commit | a6f8dbc654c3dddc5ac98cf59a88447a90e99ece (patch) | |
| tree | ef4244528cd4a975bca2d00ac1b5e5430a1eac45 /net/sunrpc | |
| parent | 1fa4f3b57cf0c525027ea61011312de139b04f9b (diff) | |
| download | lwn-a6f8dbc654c3dddc5ac98cf59a88447a90e99ece.tar.gz lwn-a6f8dbc654c3dddc5ac98cf59a88447a90e99ece.zip | |
sunrpc: remove the big kernel lock
The sunrpc cache_ioctl function does not need the big kernel lock
because it uses its own queue_lock already.
rpc_pipe_ioctl apparently should be using i_lock like the other
operations on the pipe file descriptor do.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'net/sunrpc')
| -rw-r--r-- | net/sunrpc/cache.c | 15 | ||||
| -rw-r--r-- | net/sunrpc/rpc_pipe.c | 26 |
2 files changed, 11 insertions, 30 deletions
diff --git a/net/sunrpc/cache.c b/net/sunrpc/cache.c index 2b06410e584e..29b11e065015 100644 --- a/net/sunrpc/cache.c +++ b/net/sunrpc/cache.c @@ -28,7 +28,6 @@ #include <linux/workqueue.h> #include <linux/mutex.h> #include <linux/pagemap.h> -#include <linux/smp_lock.h> #include <asm/ioctls.h> #include <linux/sunrpc/types.h> #include <linux/sunrpc/cache.h> @@ -1348,15 +1347,10 @@ static unsigned int cache_poll_procfs(struct file *filp, poll_table *wait) static long cache_ioctl_procfs(struct file *filp, unsigned int cmd, unsigned long arg) { - long ret; struct inode *inode = filp->f_path.dentry->d_inode; struct cache_detail *cd = PDE(inode)->data; - lock_kernel(); - ret = cache_ioctl(inode, filp, cmd, arg, cd); - unlock_kernel(); - - return ret; + return cache_ioctl(inode, filp, cmd, arg, cd); } static int cache_open_procfs(struct inode *inode, struct file *filp) @@ -1555,13 +1549,8 @@ static long cache_ioctl_pipefs(struct file *filp, { struct inode *inode = filp->f_dentry->d_inode; struct cache_detail *cd = RPC_I(inode)->private; - long ret; - lock_kernel(); - ret = cache_ioctl(inode, filp, cmd, arg, cd); - unlock_kernel(); - - return ret; + return cache_ioctl(inode, filp, cmd, arg, cd); } static int cache_open_pipefs(struct inode *inode, struct file *filp) diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c index 95ccbcf45d3e..1e97d8610291 100644 --- a/net/sunrpc/rpc_pipe.c +++ b/net/sunrpc/rpc_pipe.c @@ -27,7 +27,6 @@ #include <linux/workqueue.h> #include <linux/sunrpc/rpc_pipe_fs.h> #include <linux/sunrpc/cache.h> -#include <linux/smp_lock.h> static struct vfsmount *rpc_mount __read_mostly; static int rpc_mount_count; @@ -309,40 +308,33 @@ rpc_pipe_poll(struct file *filp, struct poll_table_struct *wait) return mask; } -static int -rpc_pipe_ioctl_unlocked(struct file *filp, unsigned int cmd, unsigned long arg) +static long +rpc_pipe_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) { - struct rpc_inode *rpci = RPC_I(filp->f_path.dentry->d_inode); + struct inode *inode = filp->f_path.dentry->d_inode; + struct rpc_inode *rpci = RPC_I(inode); int len; switch (cmd) { case FIONREAD: - if (rpci->ops == NULL) + spin_lock(&inode->i_lock); + if (rpci->ops == NULL) { + spin_unlock(&inode->i_lock); return -EPIPE; + } len = rpci->pipelen; if (filp->private_data) { struct rpc_pipe_msg *msg; msg = (struct rpc_pipe_msg *)filp->private_data; len += msg->len - msg->copied; } + spin_unlock(&inode->i_lock); return put_user(len, (int __user *)arg); default: return -EINVAL; } } -static long -rpc_pipe_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) -{ - long ret; - - lock_kernel(); - ret = rpc_pipe_ioctl_unlocked(filp, cmd, arg); - unlock_kernel(); - - return ret; -} - static const struct file_operations rpc_pipe_fops = { .owner = THIS_MODULE, .llseek = no_llseek, |