[PATCH v1 1/2] ext4/xfs: add page refcount helper

[Matthew Wilcox]

On Thu, Oct 14, 2021 at 10:39:27AM -0500, Alex Sierra wrote:
> From: Ralph Campbell <rcampbell at nvidia.com>
> 
> 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 at nvidia.com>
> Signed-off-by: Alex Sierra <alex.sierra at amd.com>
> Reviewed-by: Christoph Hellwig <hch at lst.de>
> Acked-by: Theodore Ts'o <tytso at mit.edu>
> Acked-by: Darrick J. Wong <djwong at kernel.org>

Reviewed-by: Matthew Wilcox (Oracle) <willy at infradead.org>