[RFC PATCH 06/16] mm/damon/paddr: respect return_max_wsum

[SJ Park <sj@kernel.org>]

apply_probes() ops implementation in DAMON_PADDR is ignoring
return_max_wsum.  Respect it.

Signed-off-by: SJ Park <sj@kernel.org>
---
 mm/damon/paddr.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/mm/damon/paddr.c b/mm/damon/paddr.c
index 3eba3564a31fc..b85f88a7a38f4 100644
--- a/mm/damon/paddr.c
+++ b/mm/damon/paddr.c
@@ -172,6 +172,7 @@ static unsigned int damon_pa_apply_probes(struct damon_ctx *ctx,
 	struct damon_target *t;
 	struct damon_region *r;
 	struct damon_probe *p;
+	unsigned int max_wsum = 0;
 
 	damon_for_each_target(t, ctx) {
 		damon_for_each_region(r, t) {
@@ -182,7 +183,6 @@ static unsigned int damon_pa_apply_probes(struct damon_ctx *ctx,
 			if (set_samples)
 				r->sampling_addr = damon_rand(ctx, r->ar.start,
 						r->ar.end);
-
 			pa = damon_pa_phys_addr(r->sampling_addr,
 					ctx->addr_unit);
 			folio = damon_get_folio(PHYS_PFN(pa));
@@ -193,9 +193,12 @@ static unsigned int damon_pa_apply_probes(struct damon_ctx *ctx,
 			}
 			if (folio)
 				folio_put(folio);
+			if (return_max_wsum)
+				max_wsum = max(damon_probe_hits_wsum(r, false,
+							ctx), max_wsum);
 		}
 	}
-	return 0;
+	return max_wsum;
 }
 
 /*
-- 
2.47.3