dax: clear dirty entry tags on cache flush

Currently we never clear dirty tags in DAX mappings and thus address
ranges to flush accumulate.  Now that we have locking of radix tree
entries, we have all the locking necessary to reliably clear the radix
tree dirty tag when flushing caches for corresponding address range.
Similarly to page_mkclean() we also have to write-protect pages to get a
page fault when the page is next written to so that we can mark the
entry dirty again.

Link: http://lkml.kernel.org/r/1479460644-25076-21-git-send-email-jack@suse.cz
Signed-off-by: Jan Kara <jack@suse.cz>
Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

path: root/sound/usb/format.h

#ifndef __USBAUDIO_FORMAT_H
#define __USBAUDIO_FORMAT_H

int snd_usb_parse_audio_format(struct snd_usb_audio *chip,
			       struct audioformat *fp, unsigned int format,
			       struct uac_format_type_i_continuous_descriptor *fmt,
			       int stream);

#endif /*  __USBAUDIO_FORMAT_H */