staging: goldfish: document spinlock usage

Coding style: document spinlock usage

Signed-off-by: Loic Pefferkorn <loic@loicp.eu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/goldfish/goldfish_audio.c b/drivers/staging/goldfish/goldfish_audio.c
index 23a206d5979028993e7814e51704c39bcd1c81bd..b360d07564b16f648e8cbbddbea0d9444f83ecd8 100644 (file)
--- a/drivers/staging/goldfish/goldfish_audio.c
+++ b/drivers/staging/goldfish/goldfish_audio.c
@@ -36,6 +36,7 @@ MODULE_VERSION("1.0");
 struct goldfish_audio {
        char __iomem *reg_base;
        int irq;
+       /* lock protects access to buffer_status and to device registers */
        spinlock_t lock;
        wait_queue_head_t wait;