From: Hugh Dickins <hugh@veritas.com>
Date: Sun, 28 Oct 2007 21:22:25 +0000 (+0100)
Subject: hugetlb: fix error return for brk() entering a hugepage region
X-Git-Tag: v2.6.16.56-rc2~2
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=255189a700d809000157d5eed1a3ede9e6426f68;p=karo-tx-linux.git

hugetlb: fix error return for brk() entering a hugepage region

The lats commit causes the wrong return value.
is_hugepage_only_range() is a boolean, so we should return
-EINVAL rather than 1.

Also - we can use "mm" instead of looking up "current->mm" again.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Adrian Bunk <bunk@kernel.org>
---

diff --git a/mm/mmap.c b/mm/mmap.c
index a04576de3254..666932b09ea0 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1870,9 +1870,8 @@ unsigned long do_brk(unsigned long addr, unsigned long len)
 	if ((addr + len) > TASK_SIZE || (addr + len) < addr)
 		return -EINVAL;
 
-	error = is_hugepage_only_range(current->mm, addr, len);
-	if (error)
-		return error;
+	if (is_hugepage_only_range(mm, addr, len))
+		return -EINVAL;
 
 	flags = VM_DATA_DEFAULT_FLAGS | VM_ACCOUNT | mm->def_flags;