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| author | Christian Borntraeger <borntraeger@de.ibm.com> | 2008-12-25 13:38:34 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2008-12-25 13:38:54 +0100 |
| commit | a114a9d69d1362546b9dda651028acb311ddb7af (patch) | |
| tree | c538cbdb79ca97bd06d889d62300f0fbf53c3c6a /drivers/s390/char/vmcp.c | |
| parent | f414f5f15376764d68a31dc568d9e814d3fcb58a (diff) | |
| download | op-kernel-dev-a114a9d69d1362546b9dda651028acb311ddb7af.zip op-kernel-dev-a114a9d69d1362546b9dda651028acb311ddb7af.tar.gz | |
[S390] vmcp: remove BKL
The vmcp driver uses the session->mutex for concurrent access of the data
structures. Therefore, the BKL in vmcp_open does not protect against any
other function in the driver.
The BLK in vmcp_open would protect concurrent access to the module init
but all necessary steps ave finished before misc_register is called.
We can safely remove the lock_kernel from vcmp.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/char/vmcp.c')
| -rw-r--r-- | drivers/s390/char/vmcp.c | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/drivers/s390/char/vmcp.c b/drivers/s390/char/vmcp.c index 09e7d9b..d7083b3 100644 --- a/drivers/s390/char/vmcp.c +++ b/drivers/s390/char/vmcp.c @@ -16,7 +16,6 @@ #include <linux/kernel.h> #include <linux/miscdevice.h> #include <linux/module.h> -#include <linux/smp_lock.h> #include <asm/cpcmd.h> #include <asm/debug.h> #include <asm/uaccess.h> @@ -41,13 +40,11 @@ static int vmcp_open(struct inode *inode, struct file *file) if (!session) return -ENOMEM; - lock_kernel(); session->bufsize = PAGE_SIZE; session->response = NULL; session->resp_size = 0; mutex_init(&session->mutex); file->private_data = session; - unlock_kernel(); return nonseekable_open(inode, file); } |
