From 6e1415467614e854fee660ff6648bd10fa976e95 Mon Sep 17 00:00:00 2001
From: David Howells <dhowells@redhat.com>
Date: Tue, 15 Dec 2009 19:27:45 +0000
Subject: NOMMU: Optimise away the {dac_,}mmap_min_addr tests

In NOMMU mode clamp dac_mmap_min_addr to zero to cause the tests on it to be
skipped by the compiler.  We do this as the minimum mmap address doesn't make
any sense in NOMMU mode.

mmap_min_addr and round_hint_to_min() can be discarded entirely in NOMMU mode.

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Eric Paris <eparis@redhat.com>
Signed-off-by: James Morris <jmorris@namei.org>
---
 mm/Kconfig | 1 +
 1 file changed, 1 insertion(+)

(limited to 'mm')

diff --git a/mm/Kconfig b/mm/Kconfig
index 43ea8c3a2bbf..ee9f3e0f2b69 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -221,6 +221,7 @@ config KSM
 
 config DEFAULT_MMAP_MIN_ADDR
         int "Low address space to protect from user allocation"
+	depends on MMU
         default 4096
         help
 	  This is the portion of low virtual memory which should be protected
-- 
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