[PATCH] mm/hugetlb: use EOPNOTSUPP in hugetlb sysctl handlers

[Jan Stancek]

Replace ENOTSUPP with EOPNOTSUPP. If hugepages are not supported,
this value is propagated to userspace. EOPNOTSUPP is part of uapi
and is widely supported by libc libraries.

Cc: Andrew Morton <a...@linux-foundation.org>
Cc: Naoya Horiguchi <n-horigu...@ah.jp.nec.com>
Cc: Mike Kravetz <mike.krav...@oracle.com>
Cc: Hillf Danton <hillf...@alibaba-inc.com>
Cc: "Kirill A. Shutemov" <kirill.shute...@linux.intel.com>
Cc: Dave Hansen <dave.han...@linux.intel.com>
Cc: Paul Gortmaker <paul.gortma...@windriver.com>

Signed-off-by: Jan Stancek <jstan...@redhat.com>
---
 mm/hugetlb.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 01f2b48c8618..851a29928a99 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -2751,7 +2751,7 @@ static int hugetlb_sysctl_handler_common(bool 
obey_mempolicy,
        int ret;
 
        if (!hugepages_supported())
-               return -ENOTSUPP;
+               return -EOPNOTSUPP;
 
        table->data = &tmp;
        table->maxlen = sizeof(unsigned long);
@@ -2792,7 +2792,7 @@ int hugetlb_overcommit_handler(struct ctl_table *table, 
int write,
        int ret;
 
        if (!hugepages_supported())
-               return -ENOTSUPP;
+               return -EOPNOTSUPP;
 
        tmp = h->nr_overcommit_huge_pages;
 
-- 
1.8.3.1