Merge tag 'for-5.15/io_uring-vfs-2021-08-30' of git://git.kernel.dk/linux-block

[linux-2.6-microblaze.git] / kernel / params.c

diff --git a/kernel/params.c b/kernel/params.c
index 2daa278..8299bd7 100644 (file)
--- a/kernel/params.c
+++ b/kernel/params.c
@@ -243,6 +243,24 @@ STANDARD_PARAM_DEF(ulong,  unsigned long,          "%lu",          kstrtoul);
 STANDARD_PARAM_DEF(ullong,     unsigned long long,     "%llu",         kstrtoull);
 STANDARD_PARAM_DEF(hexint,     unsigned int,           "%#08x",        kstrtouint);
 
+int param_set_uint_minmax(const char *val, const struct kernel_param *kp,
+               unsigned int min, unsigned int max)
+{
+       unsigned int num;
+       int ret;
+
+       if (!val)
+               return -EINVAL;
+       ret = kstrtouint(val, 0, &num);
+       if (ret)
+               return ret;
+       if (num < min || num > max)
+               return -EINVAL;
+       *((unsigned int *)kp->arg) = num;
+       return 0;
+}
+EXPORT_SYMBOL_GPL(param_set_uint_minmax);
+
 int param_set_charp(const char *val, const struct kernel_param *kp)
 {
        if (strlen(val) > 1024) {