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mm: remove zone_id() and make use of zone_idx() in is_dev_zone() 

is_dev_zone() is using zone_id() to check if the zone is ZONE_DEVICE.
zone_id() looks pretty much the same as zone_idx(), and while the use of
zone_idx() is quite spread in the kernel, zone_id() is only being used by
is_dev_zone().

This patch removes zone_id() and makes is_dev_zone() use zone_idx() to
check the zone, so we do not have two things with the same functionality
around.

Link: http://lkml.kernel.org/r/20180730133718.28683-1-osalvador@techadventures.net
Signed-off-by: Oscar Salvador <osalvador@suse.de>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: Pavel Tatashin <pasha.tatashin@oracle.com>
Cc: Pasha Tatashin <Pavel.Tatashin@microsoft.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Oscar Salvador 2018-08-21 21:53:24 -07:00 committed by Linus Torvalds
parent 85f237a57f
commit 89696701ea
1 changed files with 12 additions and 19 deletions
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31
include/linux/mmzone.h
View File

@ -755,25 +755,6 @@ static inline bool pgdat_is_empty(pg_data_t *pgdat)
return !pgdat->node_start_pfn && !pgdat->node_spanned_pages;
}
static inline int zone_id(const struct zone *zone)
{
struct pglist_data *pgdat = zone->zone_pgdat;
return zone - pgdat->node_zones;
}
#ifdef CONFIG_ZONE_DEVICE
static inline bool is_dev_zone(const struct zone *zone)
{
return zone_id(zone) == ZONE_DEVICE;
}
#else
static inline bool is_dev_zone(const struct zone *zone)
{
return false;
}
#endif
#include <linux/memory_hotplug.h>
void build_all_zonelists(pg_data_t *pgdat);
@ -824,6 +805,18 @@ 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