mm: hugetlb_vmemmap: simplify hugetlb_vmemmap_init() a bit

The check of IS_ENABLED(CONFIG_PROC_SYSCTL) is unnecessary since
register_sysctl_init() will be empty in this case.  So, there is no
warnings after removing the check.

Link: https://lkml.kernel.org/r/20230223065947.64134-1-songmuchun@bytedance.com
Signed-off-by: Muchun Song <songmuchun@bytedance.com>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/mm/hugetlb_vmemmap.c b/mm/hugetlb_vmemmap.c
index a559037..a15cc56 100644 (file)
--- a/mm/hugetlb_vmemmap.c
+++ b/mm/hugetlb_vmemmap.c
@@ -590,17 +590,15 @@ static struct ctl_table hugetlb_vmemmap_sysctls[] = {
 
 static int __init hugetlb_vmemmap_init(void)
 {
+       const struct hstate *h;
+
        /* HUGETLB_VMEMMAP_RESERVE_SIZE should cover all used struct pages */
        BUILD_BUG_ON(__NR_USED_SUBPAGE * sizeof(struct page) > HUGETLB_VMEMMAP_RESERVE_SIZE);
 
-       if (IS_ENABLED(CONFIG_PROC_SYSCTL)) {
-               const struct hstate *h;
-
-               for_each_hstate(h) {
-                       if (hugetlb_vmemmap_optimizable(h)) {
-                               register_sysctl_init("vm", hugetlb_vmemmap_sysctls);
-                               break;
-                       }
+       for_each_hstate(h) {
+               if (hugetlb_vmemmap_optimizable(h)) {
+                       register_sysctl_init("vm", hugetlb_vmemmap_sysctls);
+                       break;
                }
        }
        return 0;