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

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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 <akpm@linux-foundation.org>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Hillf Danton <hillf.zj@alibaba-inc.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>

Signed-off-by: Jan Stancek <jstancek@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

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[PATCH] mm/hugetlb: use EOPNOTSUPP in hugetlb sysctl handlers Jan Stancek <jstancek@redhat.com> - 2016-03-03 11:10 +0100
  Re: [PATCH] mm/hugetlb: use EOPNOTSUPP in hugetlb sysctl handlers "Kirill A. Shutemov" <kirill@shutemov.name> - 2016-03-03 12:00 +0100
  Re: [PATCH] mm/hugetlb: use EOPNOTSUPP in hugetlb sysctl handlers Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> - 2016-03-04 00:10 +0100

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