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authorRussell King <rmk@dyn-67.arm.linux.org.uk>2006-06-21 20:38:17 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2006-06-28 17:59:46 +0100
commit9641c7cc5a7f6d5c9dc9b43eea4e5f8c3c08c94e (patch)
tree5ff57feabe0538d58404ec4918b0d94d75f69846 /arch/arm/kernel/armksyms.c
parent002547b4f86c27bfac5bae344b723d250857be6b (diff)
downloadlinux-9641c7cc5a7f6d5c9dc9b43eea4e5f8c3c08c94e.tar.bz2
[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>
Diffstat (limited to 'arch/arm/kernel/armksyms.c')
-rw-r--r--arch/arm/kernel/armksyms.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/arm/kernel/armksyms.c b/arch/arm/kernel/armksyms.c
index f8bb7abd3e9b..da69e660574b 100644
--- a/arch/arm/kernel/armksyms.c
+++ b/arch/arm/kernel/armksyms.c
@@ -109,11 +109,13 @@ EXPORT_SYMBOL(memchr);
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_1);
EXPORT_SYMBOL(__put_user_2);
EXPORT_SYMBOL(__put_user_4);
EXPORT_SYMBOL(__put_user_8);
+#endif
/* crypto hash */
EXPORT_SYMBOL(sha_transform);