ASoC: xtfpga-i2s: Add missing __rcu annotation

tx_substeam is accessed using the RCU API and hence should have the __rcu
annotation. Fixes the following sparse warnings:

	sound/soc/xtensa/xtfpga-i2s.c:165:24: error: incompatible types in
		comparison expression (different address spaces)
	sound/soc/xtensa/xtfpga-i2s.c:165:24: error: 'struct snd_pcm_substream
		[noderef] <asn:4>*' versus
	sound/soc/xtensa/xtfpga-i2s.c:165:24: error: 'struct snd_pcm_substream *'
	sound/soc/xtensa/xtfpga-i2s.c:255:24: error: incompatible types in
		comparison expression (different address spaces)
	sound/soc/xtensa/xtfpga-i2s.c:255:24: error: 'struct snd_pcm_substream
		[noderef] <asn:4>*' versus
	sound/soc/xtensa/xtfpga-i2s.c:255:24: error: 'struct snd_pcm_substream *'

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/xtensa/xtfpga-i2s.c b/sound/soc/xtensa/xtfpga-i2s.c
index 039f65e36fa88faf2e4d6f4395fdc1c527fc9e5e..8382ffa3bcaf8b446dd67197503f3c21cef307ba 100644 (file)
--- a/sound/soc/xtensa/xtfpga-i2s.c
+++ b/sound/soc/xtensa/xtfpga-i2s.c
@@ -75,7 +75,7 @@ struct xtfpga_i2s {
         * stream in the pcm_close callback it synchronizes with the interrupt
         * handler by means of synchronize_rcu call.
         */
-       struct snd_pcm_substream *tx_substream;
+       struct snd_pcm_substream __rcu *tx_substream;
        unsigned (*tx_fn)(struct xtfpga_i2s *i2s,
                          struct snd_pcm_runtime *runtime,
                          unsigned tx_ptr);