hugetlb: make hugetlb depends on SYSFS or SYSCTL

If CONFIG_SYSFS and CONFIG_SYSCTL are both undefined, hugetlb doesn't work
now as there's no way to set max huge pages. Make sure at least one of the
above configs is defined to make hugetlb works as expected.

Link: https://lkml.kernel.org/r/20220901120030.63318-11-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Muchun Song <songmuchun@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/fs/Kconfig b/fs/Kconfig
index a547307c1ae824a9283fb1f79c721585fa967323..2685a4d0d353188b6dbf2a30fb6650231e184636 100644 (file)
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -235,6 +235,7 @@ config ARCH_SUPPORTS_HUGETLBFS
 config HUGETLBFS
        bool "HugeTLB file system support"
        depends on X86 || IA64 || SPARC64 || ARCH_SUPPORTS_HUGETLBFS || BROKEN
+       depends on (SYSFS || SYSCTL)
        help
          hugetlbfs is a filesystem backing for HugeTLB pages, based on
          ramfs. For architectures that support it, say Y here and read