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| author | Cody P Schafer <cody@linux.vnet.ibm.com> | 2013-02-22 16:35:23 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-02-23 17:50:20 -0800 |
| commit | 108bcc96ef7047c02cad4d229f04da38186a3f3f (patch) | |
| tree | e11d82074cae54dcf0fa8eea12750c661a16b02d /mm/memory_hotplug.c | |
| parent | 9127ab4ff92f0ecd7b4671efa9d0edb21c691e9f (diff) | |
| download | lwn-108bcc96ef7047c02cad4d229f04da38186a3f3f.tar.gz lwn-108bcc96ef7047c02cad4d229f04da38186a3f3f.zip | |
mm: add & use zone_end_pfn() and zone_spans_pfn()
Add 2 helpers (zone_end_pfn() and zone_spans_pfn()) to reduce code
duplication.
This also switches to using them in compaction (where an additional
variable needed to be renamed), page_alloc, vmstat, memory_hotplug, and
kmemleak.
Note that in compaction.c I avoid calling zone_end_pfn() repeatedly
because I expect at some point the sycronization issues with start_pfn &
spanned_pages will need fixing, either by actually using the seqlock or
clever memory barrier usage.
Signed-off-by: Cody P Schafer <cody@linux.vnet.ibm.com>
Cc: David Hansen <dave@linux.vnet.ibm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/memory_hotplug.c')
| -rw-r--r-- | mm/memory_hotplug.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index dda1ca695a08..8b3235eedf3d 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -299,7 +299,7 @@ static int __meminit move_pfn_range_left(struct zone *z1, struct zone *z2, pgdat_resize_lock(z1->zone_pgdat, &flags); /* can't move pfns which are higher than @z2 */ - if (end_pfn > z2->zone_start_pfn + z2->spanned_pages) + if (end_pfn > zone_end_pfn(z2)) goto out_fail; /* the move out part mast at the left most of @z2 */ if (start_pfn > z2->zone_start_pfn) @@ -315,7 +315,7 @@ static int __meminit move_pfn_range_left(struct zone *z1, struct zone *z2, z1_start_pfn = start_pfn; resize_zone(z1, z1_start_pfn, end_pfn); - resize_zone(z2, end_pfn, z2->zone_start_pfn + z2->spanned_pages); + resize_zone(z2, end_pfn, zone_end_pfn(z2)); pgdat_resize_unlock(z1->zone_pgdat, &flags); @@ -347,15 +347,15 @@ static int __meminit move_pfn_range_right(struct zone *z1, struct zone *z2, if (z1->zone_start_pfn > start_pfn) goto out_fail; /* the move out part mast at the right most of @z1 */ - if (z1->zone_start_pfn + z1->spanned_pages > end_pfn) + if (zone_end_pfn(z1) > end_pfn) goto out_fail; /* must included/overlap */ - if (start_pfn >= z1->zone_start_pfn + z1->spanned_pages) + if (start_pfn >= zone_end_pfn(z1)) goto out_fail; /* use end_pfn for z2's end_pfn if z2 is empty */ if (z2->spanned_pages) - z2_end_pfn = z2->zone_start_pfn + z2->spanned_pages; + z2_end_pfn = zone_end_pfn(z2); else z2_end_pfn = end_pfn; |