On Thu, Oct 14, 2021 at 10:39:27AM -0500, Alex Sierra wrote: > From: Ralph Campbell <rcampbell@xxxxxxxxxx> > > There are several places where ZONE_DEVICE struct pages assume a reference > count == 1 means the page is idle and free. Instead of open coding this, > add a helper function to hide this detail. > > Signed-off-by: Ralph Campbell <rcampbell@xxxxxxxxxx> > Signed-off-by: Alex Sierra <alex.sierra@xxxxxxx> > Reviewed-by: Christoph Hellwig <hch@xxxxxx> > Acked-by: Theodore Ts'o <tytso@xxxxxxx> > Acked-by: Darrick J. Wong <djwong@xxxxxxxxxx> > --- > v3: > [AS]: rename dax_layout_is_idle_page func to dax_page_unused > > v4: > [AS]: This ref count functionality was missing on fuse/dax.c. > --- > fs/dax.c | 4 ++-- > fs/ext4/inode.c | 5 +---- > fs/fuse/dax.c | 4 +--- > fs/xfs/xfs_file.c | 4 +--- > include/linux/dax.h | 10 ++++++++++ > 5 files changed, 15 insertions(+), 12 deletions(-) Reviewed-by: Jason Gunthorpe <jgg@xxxxxxxxxx> Jason
