[PATCH 28/30] x86/xen: Use kstrtobool() instead of strtobool()

[Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>]

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>)

Signed-off-by: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
---
This patch is part of a serie that axes all usages of strtobool().
Each patch can be applied independently from the other ones.

The last patch of the serie removes the definition of strtobool().

You may not be in copy of the cover letter. So, if needed, it is available
at [1].

[1]: 
https://lore.kernel.org/all/cover.1667336095.git.christophe.jaillet@xxxxxxxxxx/
---
 arch/x86/xen/enlighten_pv.c | 3 ++-
 arch/x86/xen/setup.c        | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/arch/x86/xen/enlighten_pv.c b/arch/x86/xen/enlighten_pv.c
index 05170fc19083..9e1ac6a281e4 100644
--- a/arch/x86/xen/enlighten_pv.c
+++ b/arch/x86/xen/enlighten_pv.c
@@ -23,6 +23,7 @@
 #include <linux/start_kernel.h>
 #include <linux/sched.h>
 #include <linux/kprobes.h>
+#include <linux/kstrtox.h>
 #include <linux/memblock.h>
 #include <linux/export.h>
 #include <linux/mm.h>
@@ -113,7 +114,7 @@ static __read_mostly bool xen_msr_safe = 
IS_ENABLED(CONFIG_XEN_PV_MSR_SAFE);
 static int __init parse_xen_msr_safe(char *str)
 {
        if (str)
-               return strtobool(str, &xen_msr_safe);
+               return kstrtobool(str, &xen_msr_safe);
        return -EINVAL;
 }
 early_param("xen_msr_safe", parse_xen_msr_safe);
diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
index cfa99e8f054b..0abccdab5bc6 100644
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -7,6 +7,7 @@
 
 #include <linux/init.h>
 #include <linux/sched.h>
+#include <linux/kstrtox.h>
 #include <linux/mm.h>
 #include <linux/pm.h>
 #include <linux/memblock.h>
@@ -85,7 +86,7 @@ static void __init xen_parse_512gb(void)
        arg = strstr(xen_start_info->cmd_line, "xen_512gb_limit=");
        if (!arg)
                val = true;
-       else if (strtobool(arg + strlen("xen_512gb_limit="), &val))
+       else if (kstrtobool(arg + strlen("xen_512gb_limit="), &val))
                return;
 
        xen_512gb_limit = val;
-- 
2.34.1