UPSTREAM: mm/damon/sysfs: split out schemes directory implementation to separate file

DAMON sysfs interface for 'schemes' directory is implemented using about
one thousand lines of code.  It has no strong dependency with other
parts of its file, so split it out to another file for better code
management.

Link: https://lkml.kernel.org/r/20221026225943.100429-11-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

(cherry picked from commit c8e7b4d0ba)

Bug: 300502883
Change-Id: I3a8f63dc4f6de6f4662b6f1a7d12afe1e25b36d2
Signed-off-by: cui yangpei <cuiyangpei@xiaomi.com>

mm/damon/Makefile

@@ -3,7 +3,7 @@
 obj-y				:= core.o
 obj-$(CONFIG_DAMON_VADDR)	+= ops-common.o vaddr.o
 obj-$(CONFIG_DAMON_PADDR)	+= ops-common.o paddr.o
-obj-$(CONFIG_DAMON_SYSFS)	+= sysfs-common.o sysfs.o
+obj-$(CONFIG_DAMON_SYSFS)	+= sysfs-common.o sysfs-schemes.o sysfs.o
 obj-$(CONFIG_DAMON_DBGFS)	+= dbgfs.o
 obj-$(CONFIG_DAMON_RECLAIM)	+= reclaim.o
 obj-$(CONFIG_DAMON_LRU_SORT)	+= lru_sort.o

mm/damon/sysfs-common.h

@@ -22,3 +22,25 @@ struct damon_sysfs_ul_range *damon_sysfs_ul_range_alloc(
 void damon_sysfs_ul_range_release(struct kobject *kobj);
 
 extern struct kobj_type damon_sysfs_ul_range_ktype;
+
+/*
+ * schemes directory
+ */
+
+struct damon_sysfs_schemes {
+	struct kobject kobj;
+	struct damon_sysfs_scheme **schemes_arr;
+	int nr;
+};
+
+struct damon_sysfs_schemes *damon_sysfs_schemes_alloc(void);
+void damon_sysfs_schemes_rm_dirs(struct damon_sysfs_schemes *schemes);
+
+extern struct kobj_type damon_sysfs_schemes_ktype;
+
+int damon_sysfs_set_schemes(struct damon_ctx *ctx,
+		struct damon_sysfs_schemes *sysfs_schemes);
+
+void damon_sysfs_schemes_update_stats(
+		struct damon_sysfs_schemes *sysfs_schemes,
+		struct damon_ctx *ctx);