mm/damon/vaddr: move 'damon_set_regions()' to core

This commit moves 'damon_set_regions()' from vaddr to core, as it is aimed
to be used by not only 'vaddr' but also other parts of DAMON.

Link: https://lkml.kernel.org/r/20220429160606.127307-5-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

1 files changed, 0 insertions, 73 deletions

diff --git a/mm/damon/vaddr.c b/mm/damon/vaddr.c
index 26e9ad80f9ea..fcb44210204a 100644
--- a/mm/damon/vaddr.c
+++ b/mm/damon/vaddr.c
@@ -286,79 +286,6 @@ static void damon_va_init(struct damon_ctx *ctx)
  */
 
 /*
- * Check whether a region is intersecting an address range
- *
- * Returns true if it is.
- */
-static bool damon_intersect(struct damon_region *r,
-		struct damon_addr_range *re)
-{
-	return !(r->ar.end <= re->start || re->end <= r->ar.start);
-}
-
-/*
- * damon_set_regions() - Set regions of a target for given address ranges.
- * @t:		the given target.
- * @ranges:	array of new monitoring target ranges.
- * @nr_ranges:	length of @ranges.
- *
- * This function adds new regions to, or modify existing regions of a
- * monitoring target to fit in specific ranges.
- *
- * Return: 0 if success, or negative error code otherwise.
- */
-static int damon_set_regions(struct damon_target *t,
-		struct damon_addr_range *ranges, unsigned int nr_ranges)
-{
-	struct damon_region *r, *next;
-	unsigned int i;
-
-	/* Remove regions which are not in the new ranges */
-	damon_for_each_region_safe(r, next, t) {
-		for (i = 0; i < nr_ranges; i++) {
-			if (damon_intersect(r, &ranges[i]))
-				break;
-		}
-		if (i == nr_ranges)
-			damon_destroy_region(r, t);
-	}
-
-	/* Add new regions or resize existing regions to fit in the ranges */
-	for (i = 0; i < nr_ranges; i++) {
-		struct damon_region *first = NULL, *last, *newr;
-		struct damon_addr_range *range;
-
-		range = &ranges[i];
-		/* Get the first/last regions intersecting with the range */
-		damon_for_each_region(r, t) {
-			if (damon_intersect(r, range)) {
-				if (!first)
-					first = r;
-				last = r;
-			}
-			if (r->ar.start >= range->end)
-				break;
-		}
-		if (!first) {
-			/* no region intersects with this range */
-			newr = damon_new_region(
-					ALIGN_DOWN(range->start,
-						DAMON_MIN_REGION),
-					ALIGN(range->end, DAMON_MIN_REGION));
-			if (!newr)
-				return -ENOMEM;
-			damon_insert_region(newr, damon_prev_region(r), r, t);
-		} else {
-			/* resize intersecting regions to fit in this range */
-			first->ar.start = ALIGN_DOWN(range->start,
-					DAMON_MIN_REGION);
-			last->ar.end = ALIGN(range->end, DAMON_MIN_REGION);
-		}
-	}
-	return 0;
-}
-
-/*
  * Update damon regions for the three big regions of the given target
  *
  * t		the given target