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authorSeongJae Park <sj@kernel.org>2022-09-13 17:44:28 +0000
committerAndrew Morton <akpm@linux-foundation.org>2022-10-03 14:03:09 -0700
commitf82e70e26b505cd8a1d5c670dc5038a938708d4a (patch)
tree873fcba8db8a3be0c084cb92398458be0c7da7b1 /mm/damon
parent3791bc7bf1034dcce89541e54630d0307cc199fb (diff)
downloadlinux-f82e70e26b505cd8a1d5c670dc5038a938708d4a.tar.gz
mm/damon/paddr: make supported DAMOS actions of paddr clear
Patch series "mm/damon: cleanup code".

DAMON code was not so clean from the beginning, but it has been too much
nowadays, especially due to the duplicates in DAMON_RECLAIM and
DAMON_LRU_SORT.  This patchset cleans some of the mess.


This patch (of 22):

The 'switch-case' statement in 'damon_va_apply_scheme()' function provides
a 'case' for every supported DAMOS action while all not-yet-supported
DAMOS actions fall through the 'default' case, and comment it so that
people can easily know which actions are supported.  Its counterpart in
'paddr', 'damon_pa_apply_scheme()', however, doesn't.  This commit makes
the 'paddr' side function follows the pattern of 'vaddr' for better
readability and consistency.

Link: https://lkml.kernel.org/r/20220913174449.50645-1-sj@kernel.org
Link: https://lkml.kernel.org/r/20220913174449.50645-2-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/damon')
-rw-r--r--mm/damon/paddr.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/mm/damon/paddr.c b/mm/damon/paddr.c
index 6b0d9e6aa677..219127cb49e2 100644
--- a/mm/damon/paddr.c
+++ b/mm/damon/paddr.c
@@ -275,7 +275,10 @@ static unsigned long damon_pa_apply_scheme(struct damon_ctx *ctx,
 		return damon_pa_mark_accessed(r);
 	case DAMOS_LRU_DEPRIO:
 		return damon_pa_deactivate_pages(r);
+	case DAMOS_STAT:
+		break;
 	default:
+		/* DAMOS actions that not yet supported by 'paddr'. */
 		break;
 	}
 	return 0;