diff options
| author | Sebastian Ott <sebott@linux.vnet.ibm.com> | 2015-09-15 13:11:42 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2015-10-14 14:32:02 +0200 |
| commit | 1bc6664bdfb949bc69a08113801e7d6acbf6bc3f (patch) | |
| tree | 5426526ca602c9394d3501cf15cf61fa5acc2695 /arch/s390 | |
| parent | 279b8f9a0f3ea3399764047d487dfdd8f7bc9795 (diff) | |
s390/cio: use device_lock during cmb activation
Hold the device_lock during [de]activation of the channel measurement
block to synchronize concurrent usage of these functions.
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Reviewed-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/include/asm/cmb.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/s390/include/asm/cmb.h b/arch/s390/include/asm/cmb.h index 806eac12e3bd..ed2630c23f90 100644 --- a/arch/s390/include/asm/cmb.h +++ b/arch/s390/include/asm/cmb.h @@ -6,6 +6,7 @@ struct ccw_device; extern int enable_cmf(struct ccw_device *cdev); extern int disable_cmf(struct ccw_device *cdev); +extern int __disable_cmf(struct ccw_device *cdev); extern u64 cmf_read(struct ccw_device *cdev, int index); extern int cmf_readall(struct ccw_device *cdev, struct cmbdata *data); |