commit 9641c7cc5a7f6d5c9dc9b43eea4e5f8c3c08c94e
author Russell King <rmk@dyn-67.arm.linux.org.uk> Wed Jun 21 20:38:17 2006 +0100
committer Russell King <rmk+kernel@arm.linux.org.uk> Wed Jun 28 17:59:46 2006 +0100
tree 5ff57feabe0538d58404ec4918b0d94d75f69846
parent 002547b4f86c27bfac5bae344b723d250857be6b

[ARM] nommu: uaccess tweaks

MMUless systems have only one address space for all threads, so
both the usual access_ok() checks, and the exception handling do
not make much sense.

Hence, discard the fixup and exception tables at link time, use
memcpy/memset for the user copy/clearing functions, and define
the permission check macros to be constants.

Some of this patch was derived from the equivalent patch by
Hyok S. Choi.

Signed-off-by: Hyok S. Choi <hyok.choi@samsung.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/kernel/armksyms.c

diff --git a/arch/arm/kernel/armksyms.c b/arch/arm/kernel/armksyms.c
index f8bb7ab..da69e66 100644
--- a/arch/arm/kernel/armksyms.c
+++ b/arch/arm/kernel/armksyms.c
@@ -109,11 +109,13 @@
 EXPORT_SYMBOL(__memzero);
 
 	/* user mem (segment) */
+EXPORT_SYMBOL(__strnlen_user);
+EXPORT_SYMBOL(__strncpy_from_user);
+
+#ifdef CONFIG_MMU
 EXPORT_SYMBOL(__copy_from_user);
 EXPORT_SYMBOL(__copy_to_user);
 EXPORT_SYMBOL(__clear_user);
-EXPORT_SYMBOL(__strnlen_user);
-EXPORT_SYMBOL(__strncpy_from_user);
 
 EXPORT_SYMBOL(__get_user_1);
 EXPORT_SYMBOL(__get_user_2);
@@ -123,6 +125,7 @@
 EXPORT_SYMBOL(__put_user_2);
 EXPORT_SYMBOL(__put_user_4);
 EXPORT_SYMBOL(__put_user_8);
+#endif
 
 	/* crypto hash */
 EXPORT_SYMBOL(sha_transform);