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>

2 files changed, 3 insertions, 10 deletions

diff --git a/arch/um/sys-x86_64/signal.c b/arch/um/sys-x86_64/signal.c
index c18d929e69b..2d6cdd260c2 100644
--- a/arch/um/sys-x86_64/signal.c
+++ b/arch/um/sys-x86_64/signal.c
@@ -12,7 +12,6 @@
 #include "asm/sigcontext.h"
 #include "asm/ptrace.h"
 #include "asm/arch/ucontext.h"
-#include "choose-mode.h"
 #include "sysdep/ptrace.h"
 #include "frame_kern.h"
 #include "skas.h"
@@ -135,9 +134,7 @@ static int copy_sc_from_user(struct pt_regs *to, void __user *from)
 {
        int ret;
 
-       ret = CHOOSE_MODE(copy_sc_from_user_tt(UPT_SC(&to->regs), from,
-                                              sizeof(struct _fpstate)),
-                         copy_sc_from_user_skas(to, from));
+       ret = copy_sc_from_user_skas(to, from);
        return(ret);
 }
 
@@ -146,9 +143,7 @@ static int copy_sc_to_user(struct sigcontext __user *to,
                            struct pt_regs *from, unsigned long mask,
                            unsigned long sp)
 {
-       return(CHOOSE_MODE(copy_sc_to_user_tt(to, fp, UPT_SC(&from->regs),
-                                             sizeof(*fp), sp),
-                          copy_sc_to_user_skas(to, fp, from, mask, sp)));
+       return copy_sc_to_user_skas(to, fp, from, mask, sp);
 }
 
 struct rt_sigframe
diff --git a/arch/um/sys-x86_64/syscalls.c b/arch/um/sys-x86_64/syscalls.c
index d0ff832c9ea..d44398c9d27 100644
--- a/arch/um/sys-x86_64/syscalls.c
+++ b/arch/um/sys-x86_64/syscalls.c
@@ -14,7 +14,6 @@
 #include "asm/ptrace.h"
 #include "asm/unistd.h"
 #include "asm/prctl.h" /* XXX This should get the constants from libc */
-#include "choose-mode.h"
 #include "kern.h"
 #include "os.h"
 
@@ -92,8 +91,7 @@ long arch_prctl_skas(struct task_struct *task, int code,
 
 long sys_arch_prctl(int code, unsigned long addr)
 {
-        return CHOOSE_MODE_PROC(arch_prctl_tt, arch_prctl_skas, current, code,
-                                (unsigned long __user *) addr);
+        return arch_prctl_skas(current, code, (unsigned long __user *) addr);
 }
 
 long sys_clone(unsigned long clone_flags, unsigned long newsp,