[RFC PATCH 3/5] mm/damon/core: receive addr_unit on damon_set_region_biggest_system_ram_default()

[SeongJae Park]

damon_find_biggest_system_ram() was not supporting addr_unit in the
past.  Hence, its caller, damon_set_region_biggest_system_ram_default(),
was also not supporting addr_unit.  The previous commit has updated the
inner function to support addr_unit.  There is no reason to support
addr_unit on damon_set_region_biggest_system_ram_default().  Update it
to receive addr_unit and handle it inside.  Update callers of the
function to pass value '1' to addr_unit parameter, though. to avoid
unnecessary behavioral change.

Signed-off-by: SeongJae Park <sj@xxxxxxxxxx>
---
 include/linux/damon.h | 1 +
 mm/damon/core.c       | 7 ++++---
 mm/damon/lru_sort.c   | 1 +
 mm/damon/reclaim.c    | 1 +
 mm/damon/stat.c       | 2 +-
 5 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/include/linux/damon.h b/include/linux/damon.h
index c4095b34f7929..c269b0c93f9df 100644
--- a/include/linux/damon.h
+++ b/include/linux/damon.h
@@ -985,6 +985,7 @@ int damos_walk(struct damon_ctx *ctx, struct damos_walk_control *control);
 
 int damon_set_region_biggest_system_ram_default(struct damon_target *t,
 				unsigned long *start, unsigned long *end,
+				unsigned long addr_unit,
 				unsigned long min_region_sz);
 
 #endif	/* CONFIG_DAMON */
diff --git a/mm/damon/core.c b/mm/damon/core.c
index 38c7a919f9bb2..ce19d751f5102 100644
--- a/mm/damon/core.c
+++ b/mm/damon/core.c
@@ -3099,6 +3099,7 @@ static bool damon_find_biggest_system_ram(unsigned long *start,
  * @t:		The monitoring target to set the region.
  * @start:	The pointer to the start address of the region.
  * @end:	The pointer to the end address of the region.
+ * @addr_unit:	The address unit for the damon_ctx of @t.
  * @min_region_sz:	Minimum region size.
  *
  * This function sets the region of @t as requested by @start and @end.  If the
@@ -3111,7 +3112,7 @@ static bool damon_find_biggest_system_ram(unsigned long *start,
  */
 int damon_set_region_biggest_system_ram_default(struct damon_target *t,
 			unsigned long *start, unsigned long *end,
-			unsigned long min_region_sz)
+			unsigned long addr_unit, unsigned long min_region_sz)
 {
 	struct damon_addr_range addr_range;
 
@@ -3119,12 +3120,12 @@ int damon_set_region_biggest_system_ram_default(struct damon_target *t,
 		return -EINVAL;
 
 	if (!*start && !*end &&
-		!damon_find_biggest_system_ram(start, end, 1))
+			!damon_find_biggest_system_ram(start, end, addr_unit))
 		return -EINVAL;
 
 	addr_range.start = *start;
 	addr_range.end = *end;
-	return damon_set_regions(t, &addr_range, 1, min_region_sz);
+	return damon_set_regions(t, &addr_range, addr_unit, min_region_sz);
 }
 
 /*
diff --git a/mm/damon/lru_sort.c b/mm/damon/lru_sort.c
index 7bc5c0b2aea3e..133ea17e258df 100644
--- a/mm/damon/lru_sort.c
+++ b/mm/damon/lru_sort.c
@@ -345,6 +345,7 @@ static int damon_lru_sort_apply_parameters(void)
 	err = damon_set_region_biggest_system_ram_default(param_target,
 					&monitor_region_start,
 					&monitor_region_end,
+					param_ctx->addr_unit,
 					param_ctx->min_region_sz);
 	if (err)
 		goto out;
diff --git a/mm/damon/reclaim.c b/mm/damon/reclaim.c
index 43d76f5bed449..01f2f6cdbcdfe 100644
--- a/mm/damon/reclaim.c
+++ b/mm/damon/reclaim.c
@@ -251,6 +251,7 @@ static int damon_reclaim_apply_parameters(void)
 	err = damon_set_region_biggest_system_ram_default(param_target,
 					&monitor_region_start,
 					&monitor_region_end,
+					param_ctx->addr_unit,
 					param_ctx->min_region_sz);
 	if (err)
 		goto out;
diff --git a/mm/damon/stat.c b/mm/damon/stat.c
index 25fb44ccf99d0..f9a2028483b05 100644
--- a/mm/damon/stat.c
+++ b/mm/damon/stat.c
@@ -181,7 +181,7 @@ static struct damon_ctx *damon_stat_build_ctx(void)
 		goto free_out;
 	damon_add_target(ctx, target);
 	if (damon_set_region_biggest_system_ram_default(target, &start, &end,
-							ctx->min_region_sz))
+				ctx->addr_unit, ctx->min_region_sz))
 		goto free_out;
 	return ctx;
 free_out:
-- 
2.47.3