summaryrefslogtreecommitdiff
path: root/drivers/s390/cio/cmf.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/s390/cio/cmf.c')
-rw-r--r--drivers/s390/cio/cmf.c15
1 files changed, 9 insertions, 6 deletions
diff --git a/drivers/s390/cio/cmf.c b/drivers/s390/cio/cmf.c
index 2a34eb5f6..268aa23af 100644
--- a/drivers/s390/cio/cmf.c
+++ b/drivers/s390/cio/cmf.c
@@ -164,6 +164,9 @@ static inline u64 time_to_avg_nsec(u32 value, u32 count)
return ret;
}
+#define CMF_OFF 0
+#define CMF_ON 2
+
/*
* Activate or deactivate the channel monitor. When area is NULL,
* the monitor is deactivated. The channel monitor needs to
@@ -176,7 +179,7 @@ static inline void cmf_activate(void *area, unsigned int onoff)
register long __gpr1 asm("1");
__gpr2 = area;
- __gpr1 = onoff ? 2 : 0;
+ __gpr1 = onoff;
/* activate channel measurement */
asm("schm" : : "d" (__gpr2), "d" (__gpr1) );
}
@@ -587,7 +590,7 @@ static int alloc_cmb(struct ccw_device *cdev)
/* everything ok */
memset(mem, 0, size);
cmb_area.mem = mem;
- cmf_activate(cmb_area.mem, 1);
+ cmf_activate(cmb_area.mem, CMF_ON);
}
}
@@ -621,7 +624,7 @@ static void free_cmb(struct ccw_device *cdev)
if (list_empty(&cmb_area.list)) {
ssize_t size;
size = sizeof(struct cmb) * cmb_area.num_channels;
- cmf_activate(NULL, 0);
+ cmf_activate(NULL, CMF_OFF);
free_pages((unsigned long)cmb_area.mem, get_order(size));
cmb_area.mem = NULL;
}
@@ -841,7 +844,7 @@ static int alloc_cmbe(struct ccw_device *cdev)
/* activate global measurement if this is the first channel */
if (list_empty(&cmb_area.list))
- cmf_activate(NULL, 1);
+ cmf_activate(NULL, CMF_ON);
list_add_tail(&cdev->private->cmb_list, &cmb_area.list);
spin_unlock_irq(cdev->ccwlock);
@@ -878,7 +881,7 @@ static void free_cmbe(struct ccw_device *cdev)
/* deactivate global measurement if this is the last channel */
list_del_init(&cdev->private->cmb_list);
if (list_empty(&cmb_area.list))
- cmf_activate(NULL, 0);
+ cmf_activate(NULL, CMF_OFF);
spin_unlock_irq(cdev->ccwlock);
spin_unlock(&cmb_area.lock);
}
@@ -1332,7 +1335,7 @@ void cmf_reactivate(void)
{
spin_lock(&cmb_area.lock);
if (!list_empty(&cmb_area.list))
- cmf_activate(cmb_area.mem, 1);
+ cmf_activate(cmb_area.mem, CMF_ON);
spin_unlock(&cmb_area.lock);
}