Coda: push BKL regions into coda_upcall()

Now that shared inode state is locked using the cii->c_lock, the BKL is
only used to protect the upcall queues used to communicate with the
userspace cache manager. The remaining state is all local and we can
push the lock further down into coda_upcall().

Signed-off-by: Yoshihisa Abe <yoshiabe@cs.cmu.edu>
Signed-off-by: Jan Harkes <jaharkes@cs.cmu.edu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 6 insertions, 16 deletions

diff --git a/fs/coda/pioctl.c b/fs/coda/pioctl.c
index 028a9a0..2fd89b5 100644
--- a/fs/coda/pioctl.c
+++ b/fs/coda/pioctl.c
@@ -23,8 +23,6 @@
 #include <linux/coda_fs_i.h>
 #include <linux/coda_psdev.h>
 
-#include <linux/smp_lock.h>
-
 /* pioctl ops */
 static int coda_ioctl_permission(struct inode *inode, int mask);
 static long coda_pioctl(struct file *filp, unsigned int cmd,
@@ -58,13 +56,9 @@ static long coda_pioctl(struct file *filp, unsigned int cmd,
 	struct inode *target_inode = NULL;
 	struct coda_inode_info *cnp;
 
-	lock_kernel();
-
 	/* get the Pioctl data arguments from user space */
-	if (copy_from_user(&data, (void __user *)user_data, sizeof(data))) {
-		error = -EINVAL;
-		goto out;
-	}
+	if (copy_from_user(&data, (void __user *)user_data, sizeof(data)))
+		return -EINVAL;
 
 	/*
 	 * Look up the pathname. Note that the pathname is in
@@ -76,13 +70,12 @@ static long coda_pioctl(struct file *filp, unsigned int cmd,
 		error = user_lpath(data.path, &path);
 
 	if (error)
-		goto out;
-	else
-		target_inode = path.dentry->d_inode;
+		return error;
+
+	target_inode = path.dentry->d_inode;
 
 	/* return if it is not a Coda inode */
 	if (target_inode->i_sb != inode->i_sb) {
-		path_put(&path);
 		error = -EINVAL;
 		goto out;
 	}
@@ -91,10 +84,7 @@ static long coda_pioctl(struct file *filp, unsigned int cmd,
 	cnp = ITOC(target_inode);
 
 	error = venus_pioctl(inode->i_sb, &(cnp->c_fid), cmd, &data);
-
-	path_put(&path);
-
 out:
-	unlock_kernel();
+	path_put(&path);
 	return error;
 }