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mm/compaction: rename 'start_pfn' to 'iteration_start_pfn' in compact_zone()

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There are two 'start_pfn' declared in compact_zone() which have different
meanings.  Rename the second one to 'iteration_start_pfn' to prevent
confusion.

Also, remove an useless semicolon.

Link: https://lkml.kernel.org/r/20201019115044.1571-1-yanfei.xu@windriver.com
Signed-off-by: Yanfei Xu <yanfei.xu@windriver.com>
Acked-by: David Hildenbrand <david@redhat.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Pankaj Gupta <pankaj.gupta.linux@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Yanfei Xu 2020-12-14 19:12:39 -08:00 committed by Linus Torvalds
parent 135f97fd0c
commit 19d3cf9de1
1 changed files with 3 additions and 4 deletions
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7
mm/compaction.c
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@ -2275,7 +2275,7 @@ compact_zone(struct compact_control *cc, struct capture_control *capc)
while ((ret = compact_finished(cc)) == COMPACT_CONTINUE) { while ((ret = compact_finished(cc)) == COMPACT_CONTINUE) {
int err; int err;
unsigned long start_pfn = cc->migrate_pfn; unsigned long iteration_start_pfn = cc->migrate_pfn;
/* /*
* Avoid multiple rescans which can happen if a page cannot be * Avoid multiple rescans which can happen if a page cannot be
@ -2287,7 +2287,7 @@ compact_zone(struct compact_control *cc, struct capture_control *capc)
*/ */
cc->rescan = false; cc->rescan = false;
if (pageblock_start_pfn(last_migrated_pfn) == if (pageblock_start_pfn(last_migrated_pfn) ==
pageblock_start_pfn(start_pfn)) { pageblock_start_pfn(iteration_start_pfn)) {
cc->rescan = true; cc->rescan = true;
} }
@ -2311,8 +2311,7 @@ compact_zone(struct compact_control *cc, struct capture_control *capc)
goto check_drain; goto check_drain;
case ISOLATE_SUCCESS: case ISOLATE_SUCCESS:
update_cached = false; update_cached = false;
last_migrated_pfn = start_pfn; last_migrated_pfn = iteration_start_pfn;
;
} }
err = migrate_pages(&cc->migratepages, compaction_alloc, err = migrate_pages(&cc->migratepages, compaction_alloc,