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authorChristian Borntraeger <borntraeger@de.ibm.com>2008-12-25 13:38:34 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2008-12-25 13:38:54 +0100
commita114a9d69d1362546b9dda651028acb311ddb7af (patch)
treec538cbdb79ca97bd06d889d62300f0fbf53c3c6a /drivers/s390/char/vmcp.c
parentf414f5f15376764d68a31dc568d9e814d3fcb58a (diff)
[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.c3
1 files changed, 0 insertions, 3 deletions
diff --git a/drivers/s390/char/vmcp.c b/drivers/s390/char/vmcp.c
index 09e7d9bf438b..d7083b33b0fe 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);
}