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-rw-r--r--drivers/staging/iio/resolver/ad2s90.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/staging/iio/resolver/ad2s90.c b/drivers/staging/iio/resolver/ad2s90.c
index 678351dabe6b..a41f5cb10da5 100644
--- a/drivers/staging/iio/resolver/ad2s90.c
+++ b/drivers/staging/iio/resolver/ad2s90.c
@@ -22,7 +22,7 @@
#define AD2S90_MAX_SPI_FREQ_HZ 830000
struct ad2s90_state {
- struct mutex lock;
+ struct mutex lock; /* lock to protect rx buffer */
struct spi_device *sdev;
u8 rx[2] ____cacheline_aligned;
};