mm/damon/modules-common: implement a watermarks module parameters generator macro

DAMON_RECLAIM and DAMON_LRU_SORT have module parameters for watermarks
that having same names.  This commit implements a macro for generating
such module parameters so that we can reuse later.

Link: https://lkml.kernel.org/r/20220913174449.50645-13-sj@kernel.orgSigned-off-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

mm/damon/modules-common.h

@@ -16,3 +16,10 @@
 			0600);						\
 	module_param_named(max_nr_regions, attrs.max_nr_regions, ulong,	\
 			0600);
+
+#define DEFINE_DAMON_MODULES_WMARKS_PARAMS(wmarks)			\
+	module_param_named(wmarks_interval, wmarks->interval, ulong,	\
+			0600);						\
+	module_param_named(wmarks_high, wmarks.high, ulong, 0600);	\
+	module_param_named(wmarks_mid, wmarks.mid, ulong, 0600);	\
+	module_param_named(wmarks_low, wmarks.lowulong, 0600);