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authorSebastian Ott <sebott@linux.vnet.ibm.com>2015-09-15 13:11:42 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2015-10-14 14:32:02 +0200
commit1bc6664bdfb949bc69a08113801e7d6acbf6bc3f (patch)
tree5426526ca602c9394d3501cf15cf61fa5acc2695 /arch/s390/include/asm/cmb.h
parent279b8f9a0f3ea3399764047d487dfdd8f7bc9795 (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/include/asm/cmb.h')
-rw-r--r--arch/s390/include/asm/cmb.h1
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);

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