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authorYoshihisa Abe <yoshiabe@cs.cmu.edu>2010-10-25 02:03:45 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2010-10-25 08:02:40 -0700
commitf7cc02b8715618e179242ba9cc10bdc5146ae565 (patch)
tree80c1bcf6923c9982a52fbe510cb7d396fb9866fc /fs/coda/pioctl.c
parentb5ce1d83a62fc109d8e815b1fc71dcdb0d26bc49 (diff)
downloadlinux-f7cc02b8715618e179242ba9cc10bdc5146ae565.tar.bz2
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>
Diffstat (limited to 'fs/coda/pioctl.c')
-rw-r--r--fs/coda/pioctl.c22
1 files changed, 6 insertions, 16 deletions
diff --git a/fs/coda/pioctl.c b/fs/coda/pioctl.c
index 028a9a0f588b..2fd89b5c5c7b 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;
}