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authorJoonsoo Kim <iamjoonsoo.kim@lge.com>2017-09-08 16:12:59 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2017-09-08 18:26:47 -0700
commit9472f23c9eeba3b32e65a62fe2a9b3e827888afa (patch)
tree89192d7497a5b90f8b232737df2737489f29d1f3
parent638032224ed762a29baca1fc37f1168efc2554ae (diff)
download96b-common-9472f23c9eeba3b32e65a62fe2a9b3e827888afa.tar.gz
mm/mlock.c: use page_zone() instead of page_zone_id()
page_zone_id() is a specialized function to compare the zone for the pages that are within the section range. If the section of the pages are different, page_zone_id() can be different even if their zone is the same. This wrong usage doesn't cause any actual problem since __munlock_pagevec_fill() would be called again with failed index. However, it's better to use more appropriate function here. Link: http://lkml.kernel.org/r/1503559211-10259-1-git-send-email-iamjoonsoo.kim@lge.com Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: Minchan Kim <minchan@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--mm/mlock.c10
1 files changed, 4 insertions, 6 deletions
diff --git a/mm/mlock.c b/mm/mlock.c
index b562b5523a65..dfc6f1912176 100644
--- a/mm/mlock.c
+++ b/mm/mlock.c
@@ -365,8 +365,8 @@ static void __munlock_pagevec(struct pagevec *pvec, struct zone *zone)
* @start + PAGE_SIZE when no page could be added by the pte walk.
*/
static unsigned long __munlock_pagevec_fill(struct pagevec *pvec,
- struct vm_area_struct *vma, int zoneid, unsigned long start,
- unsigned long end)
+ struct vm_area_struct *vma, struct zone *zone,
+ unsigned long start, unsigned long end)
{
pte_t *pte;
spinlock_t *ptl;
@@ -394,7 +394,7 @@ static unsigned long __munlock_pagevec_fill(struct pagevec *pvec,
* Break if page could not be obtained or the page's node+zone does not
* match
*/
- if (!page || page_zone_id(page) != zoneid)
+ if (!page || page_zone(page) != zone)
break;
/*
@@ -446,7 +446,6 @@ void munlock_vma_pages_range(struct vm_area_struct *vma,
unsigned long page_increm;
struct pagevec pvec;
struct zone *zone;
- int zoneid;
pagevec_init(&pvec, 0);
/*
@@ -481,7 +480,6 @@ void munlock_vma_pages_range(struct vm_area_struct *vma,
*/
pagevec_add(&pvec, page);
zone = page_zone(page);
- zoneid = page_zone_id(page);
/*
* Try to fill the rest of pagevec using fast
@@ -490,7 +488,7 @@ void munlock_vma_pages_range(struct vm_area_struct *vma,
* pagevec.
*/
start = __munlock_pagevec_fill(&pvec, vma,
- zoneid, start, end);
+ zone, start, end);
__munlock_pagevec(&pvec, zone);
goto next;
}