On Wed, Apr 13, 2016 at 09:08:36AM -0600, Toshi Kani wrote:
> Could you do something like:
> #ifdef CONFIG_FS_DAX
> struct page *read_dax_sector(struct block_device *bdev, sector_t n);
> +unsigned long dax_get_unmapped_area(struct file *filp, unsigned long
> + unsigned long len, unsigned long pgoff, unsigned long
> static inline struct page *read_dax_sector(struct block_device *bdev,
> sector_t n)
> return ERR_PTR(-ENXIO);
> +#define dax_get_unmapped_area NULL
> in patch 1/5. Then there's no need for the ifdefs in each filesystem.
I thought about it, but I do not think we can use an inline function to an
That's not an inline function. It's just NULL. So after the preprocessor
is done with it, it just looks like:
.get_unmapped_area = NULL,
and it won't be called by get_unmapped_area().