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Subject[PATCH 2/4] mm/page_alloc: correct return value when failing at preparing
Date
From: Yanfei Xu <yanfei.xu@windriver.com>

If the array passed in is already partially populated, we should
return "nr_populated" even failing at preparing arguments stage.

Signed-off-by: Yanfei Xu <yanfei.xu@windriver.com>
Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
Link: https://lore.kernel.org/r/20210709102855.55058-1-yanfei.xu@windriver.com
---
mm/page_alloc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 6ef86f338151..803414ce9264 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -5255,7 +5255,7 @@ unsigned long __alloc_pages_bulk(gfp_t gfp, int preferred_nid,
gfp &= gfp_allowed_mask;
alloc_gfp = gfp;
if (!prepare_alloc_pages(gfp, 0, preferred_nid, nodemask, &ac, &alloc_gfp, &alloc_flags))
- return 0;
+ return nr_populated;
gfp = alloc_gfp;

/* Find an allowed local zone that meets the low watermark. */
--
2.26.2
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