Add a comment about what this spinlock is used for. Also, add
comments for two helper functions that do not need to lock/unlock
the spinlock.
Signed-off-by: H Hartley Sweeten <hsweeten@xxxxxxxxxxxxxxxxxxx>
Cc: Ian Abbott <abbotti@xxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/staging/comedi/drivers/pcmuio.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/staging/comedi/drivers/pcmuio.c b/drivers/staging/comedi/drivers/pcmuio.c
index 9e746a5..b7aa9e5 100644
--- a/drivers/staging/comedi/drivers/pcmuio.c
+++ b/drivers/staging/comedi/drivers/pcmuio.c
@@ -130,7 +130,7 @@ static const struct pcmuio_board pcmuio_boards[] = {
struct pcmuio_private {
struct {
spinlock_t pagelock; /* protect r/w of page registers */
- spinlock_t spinlock;
+ spinlock_t spinlock; /* protect member variables */
int enabled_mask;
int active;
int stop_count;
@@ -299,6 +299,7 @@ static void pcmuio_reset(struct comedi_device *dev)
}
}
+/* asics[].spinlock is already locked */
static void pcmuio_stop_intr(struct comedi_device *dev,
struct comedi_subdevice *s)
{
@@ -401,6 +402,7 @@ static irqreturn_t pcmuio_interrupt(int irq, void *d)
return handled ? IRQ_HANDLED : IRQ_NONE;
}
+/* asics[].spinlock is already locked */
static int pcmuio_start_intr(struct comedi_device *dev,
struct comedi_subdevice *s)
{
--
1.8.3.2
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