mm/damon: use kstrtobool() instead of strtobool()

strtobool() is the same as kstrtobool().  However, the latter is more used
within the kernel.

In order to remove strtobool() and slightly simplify kstrtox.h, switch to
the other function name.

While at it, include the corresponding header file (<linux/kstrtox.h>)

Link: https://lkml.kernel.org/r/ed2b46489a513988688decb53850339cc228940c.1667336095.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Christophe JAILLET <[email protected]>
Reviewed-by: SeongJae Park <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

mm/damon/lru_sort.c

@@ -8,6 +8,7 @@
 #define pr_fmt(fmt) "damon-lru-sort: " fmt
 
 #include <linux/damon.h>
+#include <linux/kstrtox.h>
 #include <linux/module.h>
 
 #include "modules-common.h"
@@ -241,7 +242,7 @@ static int damon_lru_sort_enabled_store(const char *val,
 	bool enable;
 	int err;
 
-	err = strtobool(val, &enable);
+	err = kstrtobool(val, &enable);
 	if (err)
 		return err;
 

mm/damon/reclaim.c

@@ -8,6 +8,7 @@
 #define pr_fmt(fmt) "damon-reclaim: " fmt
 
 #include <linux/damon.h>
+#include <linux/kstrtox.h>
 #include <linux/module.h>
 
 #include "modules-common.h"
@@ -187,7 +188,7 @@ static int damon_reclaim_enabled_store(const char *val,
 	bool enable;
 	int err;
 
-	err = strtobool(val, &enable);
+	err = kstrtobool(val, &enable);
 	if (err)
 		return err;