linux-kernel - [RFC][PATCH 12/18] Cut hugetlb case early for 32bit on ia64

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Message-Id: <E1NGzzv-0008Rk-2j@ZenIV.linux.org.uk>
Date:	Sat, 05 Dec 2009 19:08:51 +0000
From:	Al Viro <viro@....linux.org.uk>
To:	linux-arch@...r.kernel.org
Cc:	torvalds@...ux-foundation.org, linux-kernel@...r.kernel.org
Subject: [RFC][PATCH 12/18] Cut hugetlb case early for 32bit on ia64


It won't work anyway (hugetlb addresses there are way beyond 4Gb)
and it's easier to stop it here.

Signed-off-by: Al Viro <viro@...iv.linux.org.uk>
---
 arch/ia64/ia32/sys_ia32.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/arch/ia64/ia32/sys_ia32.c b/arch/ia64/ia32/sys_ia32.c
index 625ed8f..e031ee8 100644
--- a/arch/ia64/ia32/sys_ia32.c
+++ b/arch/ia64/ia32/sys_ia32.c
@@ -858,6 +858,9 @@ ia32_do_mmap (struct file *file, unsigned long addr, unsigned long len, int prot
 
 	prot = get_prot32(prot);
 
+	if (flags & MAP_HUGETLB)
+		return -ENOMEM;
+
 #if PAGE_SHIFT > IA32_PAGE_SHIFT
 	mutex_lock(&ia32_mmap_mutex);
 	{
-- 
1.5.6.5


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