uml: throw out CHOOSE_MODE

The next stage after removing code which depends on CONFIG_MODE_TT is removing
the CHOOSE_MODE abstraction, which provided both compile-time and run-time
branching to either tt-mode or skas-mode code.

This patch removes choose-mode.h and all inclusions of it, and replaces all
CHOOSE_MODE invocations with the skas branch.  This leaves a number of trivial
functions which will be dealt with in a later patch.

There are some changes in the uaccess and tls support which go somewhat beyond
this and eliminate some of the now-redundant functions.

Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 7 insertions, 32 deletions

diff --git a/arch/um/include/um_uaccess.h b/arch/um/include/um_uaccess.h
index 6757ee768ccb..b1629b1e1423 100644
--- a/arch/um/include/um_uaccess.h
+++ b/arch/um/include/um_uaccess.h
@@ -6,8 +6,6 @@
 #ifndef __ARCH_UM_UACCESS_H
 #define __ARCH_UM_UACCESS_H
 
-#include "choose-mode.h"
-#include "uaccess-skas.h"
 #include "asm/fixmap.h"
 
 #define __under_task_size(addr, size) \
@@ -27,20 +25,10 @@
         (__addr_range_nowrap(addr, size) && \
          (__under_task_size(addr, size) || \
           __access_ok_vsyscall(type, addr, size) || \
-          segment_eq(get_fs(), KERNEL_DS) || \
-          CHOOSE_MODE_PROC(access_ok_tt, access_ok_skas, type, addr, size)))
+          segment_eq(get_fs(), KERNEL_DS)))
 
-static inline int copy_from_user(void *to, const void __user *from, int n)
-{
-        return(CHOOSE_MODE_PROC(copy_from_user_tt, copy_from_user_skas, to,
-                                from, n));
-}
-
-static inline int copy_to_user(void __user *to, const void *from, int n)
-{
-        return(CHOOSE_MODE_PROC(copy_to_user_tt, copy_to_user_skas, to, 
-                                from, n));
-}
+extern int copy_from_user(void *to, const void __user *from, int n);
+extern int copy_to_user(void __user *to, const void *from, int n);
 
 /*
  * strncpy_from_user: - Copy a NUL terminated string from userspace.
@@ -61,11 +49,7 @@ static inline int copy_to_user(void __user *to, const void *from, int n)
  * and returns @count.
  */
 
-static inline int strncpy_from_user(char *dst, const char __user *src, int count)
-{
-        return(CHOOSE_MODE_PROC(strncpy_from_user_tt, strncpy_from_user_skas,
-                                dst, src, count));
-}
+extern int strncpy_from_user(char *dst, const char __user *src, int count);
 
 /*
  * __clear_user: - Zero a block of memory in user space, with less checking.
@@ -78,10 +62,7 @@ static inline int strncpy_from_user(char *dst, const char __user *src, int count
  * Returns number of bytes that could not be cleared.
  * On success, this will be zero.
  */
-static inline int __clear_user(void *mem, int len)
-{
-        return(CHOOSE_MODE_PROC(__clear_user_tt, __clear_user_skas, mem, len));
-}
+extern int __clear_user(void __user *mem, int len);
 
 /*
  * clear_user: - Zero a block of memory in user space.
@@ -93,10 +74,7 @@ static inline int __clear_user(void *mem, int len)
  * Returns number of bytes that could not be cleared.
  * On success, this will be zero.
  */
-static inline int clear_user(void __user *mem, int len)
-{
-        return(CHOOSE_MODE_PROC(clear_user_tt, clear_user_skas, mem, len));
-}
+extern int clear_user(void __user *mem, int len);
 
 /*
  * strlen_user: - Get the size of a string in user space.
@@ -109,10 +87,7 @@ static inline int clear_user(void __user *mem, int len)
  * On exception, returns 0.
  * If the string is too long, returns a value greater than @n.
  */
-static inline int strnlen_user(const void __user *str, long len)
-{
-        return(CHOOSE_MODE_PROC(strnlen_user_tt, strnlen_user_skas, str, len));
-}
+extern int strnlen_user(const void __user *str, int len);
 
 #endif