mm/damon/core: use str_high_low() helper in damos_wmark_wait_us()

Remove hard-coded strings by using the str_high_low() helper function.

Link: https://lkml.kernel.org/r/20250116204216.106999-2-thorsten.blum@linux.dev
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Reviewed-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Author: toblux

mm/damon/core.c

@@ -14,6 +14,7 @@
 #include <linux/psi.h>
 #include <linux/slab.h>
 #include <linux/string.h>
+#include <linux/string_choices.h>
 
 #define CREATE_TRACE_POINTS
 #include <trace/events/damon.h>
@@ -2075,9 +2076,8 @@ static unsigned long damos_wmark_wait_us(struct damos *scheme)
 	if (metric > scheme->wmarks.high || scheme->wmarks.low > metric) {
 		if (scheme->wmarks.activated)
 			pr_debug("deactivate a scheme (%d) for %s wmark\n",
-					scheme->action,
-					metric > scheme->wmarks.high ?
-					"high" : "low");
+				 scheme->action,
+				 str_high_low(metric > scheme->wmarks.high));
 		scheme->wmarks.activated = false;
 		return scheme->wmarks.interval;
 	}