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SubjectRe: [PATCH v6 07/12] mm: Kill is_dev_zone() helper
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On 17.04.19 20:39, Dan Williams wrote:
> Given there are no more usages of is_dev_zone() outside of 'ifdef
> CONFIG_ZONE_DEVICE' protection, kill off the compilation helper.
>
> Cc: Michal Hocko <mhocko@suse.com>
> Cc: David Hildenbrand <david@redhat.com>
> Cc: Logan Gunthorpe <logang@deltatee.com>
> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
> ---
> include/linux/mmzone.h | 12 ------------
> mm/page_alloc.c | 2 +-
> 2 files changed, 1 insertion(+), 13 deletions(-)
>
> diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
> index b13f0cddf75e..3237c5e456df 100644
> --- a/include/linux/mmzone.h
> +++ b/include/linux/mmzone.h
> @@ -855,18 +855,6 @@ static inline int local_memory_node(int node_id) { return node_id; };
> */
> #define zone_idx(zone) ((zone) - (zone)->zone_pgdat->node_zones)
>
> -#ifdef CONFIG_ZONE_DEVICE
> -static inline bool is_dev_zone(const struct zone *zone)
> -{
> - return zone_idx(zone) == ZONE_DEVICE;
> -}
> -#else
> -static inline bool is_dev_zone(const struct zone *zone)
> -{
> - return false;
> -}
> -#endif
> -
> /*
> * Returns true if a zone has pages managed by the buddy allocator.
> * All the reclaim decisions have to use this function rather than
> diff --git a/mm/page_alloc.c b/mm/page_alloc.c
> index c9ad28a78018..fd455bd742d5 100644
> --- a/mm/page_alloc.c
> +++ b/mm/page_alloc.c
> @@ -5844,7 +5844,7 @@ void __ref memmap_init_zone_device(struct zone *zone,
> unsigned long start = jiffies;
> int nid = pgdat->node_id;
>
> - if (WARN_ON_ONCE(!pgmap || !is_dev_zone(zone)))
> + if (WARN_ON_ONCE(!pgmap || zone_idx(zone) != ZONE_DEVICE))
> return;
>
> /*
>

I like seeing that go

Acked-by: David Hildenbrand <david@redhat.com>

--

Thanks,

David / dhildenb

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