[PATCH 1/6] mm/damon: Convert macro functions to static inline functions

[SeongJae Park <sj@kernel.org>]

This commit converts macro functions in DAMON to static inline
functions, for better type checking, code documentation, etc[1].

[1] https://lore.kernel.org/linux-mm/20211202151213.6ec830863342220da4141bc5@linux-foundation.org/

Signed-off-by: SeongJae Park <sj@kernel.org>
---
 include/linux/damon.h | 18 ++++++++++++------
 mm/damon/core.c       |  5 ++++-
 mm/damon/vaddr.c      |  6 ++++--
 3 files changed, 20 insertions(+), 9 deletions(-)

diff --git a/include/linux/damon.h b/include/linux/damon.h
index e2c8152985b7..2dbc1f545da2 100644
--- a/include/linux/damon.h
+++ b/include/linux/damon.h
@@ -399,14 +399,20 @@ struct damon_ctx {
 	struct list_head schemes;
 };
 
-#define damon_next_region(r) \
-	(container_of(r->list.next, struct damon_region, list))
+static inline struct damon_region *damon_next_region(struct damon_region *r)
+{
+	return container_of(r->list.next, struct damon_region, list);
+}
 
-#define damon_prev_region(r) \
-	(container_of(r->list.prev, struct damon_region, list))
+static inline struct damon_region *damon_prev_region(struct damon_region *r)
+{
+	return container_of(r->list.prev, struct damon_region, list);
+}
 
-#define damon_last_region(t) \
-	(list_last_entry(&t->regions_list, struct damon_region, list))
+static inline struct damon_region *damon_last_region(struct damon_target *t)
+{
+	return list_last_entry(&t->regions_list, struct damon_region, list);
+}
 
 #define damon_for_each_region(r, t) \
 	list_for_each_entry(r, &t->regions_list, list)
diff --git a/mm/damon/core.c b/mm/damon/core.c
index e981fb40052f..70771cf7da89 100644
--- a/mm/damon/core.c
+++ b/mm/damon/core.c
@@ -767,7 +767,10 @@ static void kdamond_apply_schemes(struct damon_ctx *c)
 	}
 }
 
-#define sz_damon_region(r) (r->ar.end - r->ar.start)
+static inline unsigned long sz_damon_region(struct damon_region *r)
+{
+	return r->ar.end - r->ar.start;
+}
 
 /*
  * Merge two adjacent regions into one region
diff --git a/mm/damon/vaddr.c b/mm/damon/vaddr.c
index 78ff2bcb66eb..68d9e4134816 100644
--- a/mm/damon/vaddr.c
+++ b/mm/damon/vaddr.c
@@ -26,8 +26,10 @@
  * 't->id' should be the pointer to the relevant 'struct pid' having reference
  * count.  Caller must put the returned task, unless it is NULL.
  */
-#define damon_get_task_struct(t) \
-	(get_pid_task((struct pid *)t->id, PIDTYPE_PID))
+static inline struct task_struct *damon_get_task_struct(struct damon_target *t)
+{
+	return get_pid_task((struct pid *)t->id, PIDTYPE_PID);
+}
 
 /*
  * Get the mm_struct of the given target
-- 
2.17.1