Paul Mundt wrote: > Are you sure this doesn't need an #include ? All of the > other conversions so far have.. It compiles without extra linux/mutex.h because linux/sound.h includes linux/fs.h which includes linux/mutex.h. But you are right, include linux/mutex.h is cleaner. Please find updated patch in attachment. Cheers Dirk ARM: OMAP: Convert OSS aic23 to mutex. Signed-off-by: Dirk Behme