LoongArch: enable hugetlbfs support

LoongArch inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I6BWFP

--------------------------------
Signed-off-by: NHongchen Zhang <zhanghongchen@loongson.cn>
Change-Id: I4631175847064093af8f143d0c46b267a82de069
(cherry picked from commit f3f1f3b9)

arch/loongarch/Kconfig

@@ -497,6 +497,9 @@ config ARCH_SPARSEMEM_ENABLE
 	  or have huge holes in the physical address space for other reasons.
 	  See <file:Documentation/vm/numa.rst> for more.
 
+config SYS_SUPPORTS_HUGETLBFS
+        def_bool y
+
 config ARCH_ENABLE_THP_MIGRATION
 	def_bool y
 	depends on TRANSPARENT_HUGEPAGE

arch/loongarch/configs/loongson3_defconfig

@@ -733,6 +733,7 @@ CONFIG_FAT_DEFAULT_IOCHARSET="gb2312"
 CONFIG_PROC_KCORE=y
 CONFIG_TMPFS=y
 CONFIG_TMPFS_POSIX_ACL=y
+CONFIG_HUGETLBFS=y
 CONFIG_CONFIGFS_FS=y
 CONFIG_HFS_FS=m
 CONFIG_HFSPLUS_FS=m

arch/loongarch/mm/hugetlbpage.c

@@ -13,8 +13,8 @@
 #include <asm/tlb.h>
 #include <asm/tlbflush.h>
 
-pte_t *huge_pte_alloc(struct mm_struct *mm, struct vm_area_struct *vma,
-		      unsigned long addr, unsigned long sz)
+pte_t *huge_pte_alloc(struct mm_struct *mm,
+			unsigned long addr, unsigned long sz)
 {
 	pgd_t *pgd;
 	p4d_t *p4d;