Merge /spare/repo/linux-2.6/

41 files changed, 264 insertions, 579 deletions

diff --git a/arch/um/Makefile b/arch/um/Makefile
index 5b5af95721ab..7af37e342e33 100644
--- a/arch/um/Makefile
+++ b/arch/um/Makefile
@@ -28,8 +28,6 @@ SYMLINK_HEADERS := $(foreach header,$(SYMLINK_HEADERS),include/asm-um/$(header))
 ARCH_SYMLINKS = include/asm-um/arch $(ARCH_DIR)/include/sysdep $(ARCH_DIR)/os \
         $(SYMLINK_HEADERS) $(ARCH_DIR)/include/uml-config.h
 
-GEN_HEADERS += $(ARCH_DIR)/include/task.h $(ARCH_DIR)/include/kern_constants.h
-
 um-modes-$(CONFIG_MODE_TT) += tt
 um-modes-$(CONFIG_MODE_SKAS) += skas
 
@@ -45,9 +43,7 @@ endif
 
 ARCH_INCLUDE    := -I$(ARCH_DIR)/include
 ifneq ($(KBUILD_SRC),)
-ARCH_INCLUDE    += -I$(ARCH_DIR)/include2
 ARCH_INCLUDE    += -I$(srctree)/$(ARCH_DIR)/include
-MRPROPER_DIRS   += $(ARCH_DIR)/include2
 endif
 SYS_DIR         := $(ARCH_DIR)/include/sysdep-$(SUBARCH)
 
@@ -87,10 +83,6 @@ CONFIG_KERNEL_HALF_GIGS ?= 0
 
 SIZE = (($(CONFIG_NEST_LEVEL) + $(CONFIG_KERNEL_HALF_GIGS)) * 0x20000000)
 
-ifeq ($(CONFIG_MODE_SKAS), y)
-$(SYS_HEADERS) : $(ARCH_DIR)/include/skas_ptregs.h
-endif
-
 .PHONY: linux
 
 all: linux
@@ -111,7 +103,8 @@ else
 $(shell cd $(ARCH_DIR) && ln -sf Kconfig.$(SUBARCH) Kconfig.arch)
 endif
 
-archprepare: $(ARCH_SYMLINKS) $(SYS_HEADERS) $(GEN_HEADERS)
+archprepare: $(ARCH_SYMLINKS) $(ARCH_DIR)/include/user_constants.h
+prepare: $(ARCH_DIR)/include/kern_constants.h
 
 LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static
 LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib
@@ -146,15 +139,13 @@ endef
 #When cleaning we don't include .config, so we don't include
 #TT or skas makefiles and don't clean skas_ptregs.h.
 CLEAN_FILES += linux x.i gmon.out $(ARCH_DIR)/include/uml-config.h \
-        $(GEN_HEADERS) $(ARCH_DIR)/include/skas_ptregs.h \
-        $(ARCH_DIR)/include/user_constants.h $(ARCH_DIR)/Kconfig.arch
+        $(ARCH_DIR)/include/user_constants.h \
+        $(ARCH_DIR)/include/kern_constants.h $(ARCH_DIR)/Kconfig.arch
 
 MRPROPER_FILES += $(SYMLINK_HEADERS) $(ARCH_SYMLINKS) \
         $(addprefix $(ARCH_DIR)/kernel/,$(KERN_SYMLINKS)) $(ARCH_DIR)/os
 
 archclean:
-        $(Q)$(MAKE) $(clean)=$(ARCH_DIR)/util
-        $(Q)$(MAKE) $(clean)=$(ARCH_DIR)/os-$(OS)/util
         @find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \
                 -o -name '*.gcov' \) -type f -print | xargs rm -f
 
@@ -180,9 +171,7 @@ $(ARCH_DIR)/include/sysdep:
         @echo '  SYMLINK $@'
 ifneq ($(KBUILD_SRC),)
         $(Q)mkdir -p $(ARCH_DIR)/include
-        $(Q)mkdir -p $(ARCH_DIR)/include2
-        $(Q)ln -fsn sysdep-$(SUBARCH) $(ARCH_DIR)/include/sysdep
-        $(Q)ln -fsn $(srctree)/$(ARCH_DIR)/include/sysdep-$(SUBARCH) $(ARCH_DIR)/include2/sysdep
+        $(Q)ln -fsn $(srctree)/$(ARCH_DIR)/include/sysdep-$(SUBARCH) $(ARCH_DIR)/include/sysdep
 else
         $(Q)cd $(ARCH_DIR)/include && ln -sf sysdep-$(SUBARCH) sysdep
 endif
@@ -202,8 +191,6 @@ endef
 
 define filechk_gen-asm-offsets
         (set -e; \
-         echo "#ifndef __ASM_OFFSETS_H__"; \
-         echo "#define __ASM_OFFSETS_H__"; \
          echo "/*"; \
          echo " * DO NOT MODIFY."; \
          echo " *"; \
@@ -212,8 +199,7 @@ define filechk_gen-asm-offsets
          echo " */"; \
          echo ""; \
          sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \
-         echo ""; \
-         echo "#endif" )
+         echo ""; )
 endef
 
 $(ARCH_DIR)/include/uml-config.h : include/linux/autoconf.h
@@ -222,50 +208,18 @@ $(ARCH_DIR)/include/uml-config.h : include/linux/autoconf.h
 $(ARCH_DIR)/user-offsets.s: $(ARCH_DIR)/sys-$(SUBARCH)/user-offsets.c
         $(CC) $(USER_CFLAGS) -S -o $@ $<
 
-$(ARCH_DIR)/user-offsets.h: $(ARCH_DIR)/user-offsets.s
+$(ARCH_DIR)/include/user_constants.h: $(ARCH_DIR)/user-offsets.s
         $(call filechk,gen-asm-offsets)
 
-CLEAN_FILES += $(ARCH_DIR)/user-offsets.s  $(ARCH_DIR)/user-offsets.h
+CLEAN_FILES += $(ARCH_DIR)/user-offsets.s
 
 $(ARCH_DIR)/kernel-offsets.s: $(ARCH_DIR)/sys-$(SUBARCH)/kernel-offsets.c \
-                                   $(ARCH_SYMLINKS) \
-                                   $(SYS_DIR)/sc.h \
-                                   include/asm include/linux/version.h \
-                                   include/config/MARKER \
-                                   $(ARCH_DIR)/include/user_constants.h
+                                   archprepare
         $(CC) $(CFLAGS) $(NOSTDINC_FLAGS) $(CPPFLAGS) -S -o $@ $<
 
-$(ARCH_DIR)/kernel-offsets.h: $(ARCH_DIR)/kernel-offsets.s
+$(ARCH_DIR)/include/kern_constants.h: $(ARCH_DIR)/kernel-offsets.s
         $(call filechk,gen-asm-offsets)
 
-CLEAN_FILES += $(ARCH_DIR)/kernel-offsets.s  $(ARCH_DIR)/kernel-offsets.h
-
-$(ARCH_DIR)/include/task.h: $(ARCH_DIR)/util/mk_task
-        $(call filechk,gen_header)
-
-$(ARCH_DIR)/include/user_constants.h: $(ARCH_DIR)/os-$(OS)/util/mk_user_constants
-        $(call filechk,gen_header)
-
-$(ARCH_DIR)/include/kern_constants.h: $(ARCH_DIR)/util/mk_constants
-        $(call filechk,gen_header)
-
-$(ARCH_DIR)/include/skas_ptregs.h: $(ARCH_DIR)/kernel/skas/util/mk_ptregs
-        $(call filechk,gen_header)
-
-$(ARCH_DIR)/os-$(OS)/util/mk_user_constants: $(ARCH_DIR)/os-$(OS)/util FORCE ;
-
-$(ARCH_DIR)/util/mk_task $(ARCH_DIR)/util/mk_constants: $(ARCH_DIR)/include/user_constants.h $(ARCH_DIR)/util \
-        FORCE ;
-
-$(ARCH_DIR)/kernel/skas/util/mk_ptregs: $(ARCH_DIR)/kernel/skas/util FORCE ;
-
-$(ARCH_DIR)/util: scripts_basic $(SYS_DIR)/sc.h $(ARCH_DIR)/kernel-offsets.h FORCE
-        $(Q)$(MAKE) $(build)=$@
-
-$(ARCH_DIR)/kernel/skas/util: scripts_basic $(ARCH_DIR)/user-offsets.h FORCE
-        $(Q)$(MAKE) $(build)=$@
-
-$(ARCH_DIR)/os-$(OS)/util: scripts_basic $(ARCH_DIR)/user-offsets.h FORCE
-        $(Q)$(MAKE) $(build)=$@
+CLEAN_FILES += $(ARCH_DIR)/kernel-offsets.s
 
 export SUBARCH USER_CFLAGS OS
diff --git a/arch/um/Makefile-i386 b/arch/um/Makefile-i386
index 1ab431a53ac3..2ee8a2858117 100644
--- a/arch/um/Makefile-i386
+++ b/arch/um/Makefile-i386
@@ -32,25 +32,3 @@ CFLAGS += -U__$(SUBARCH)__ -U$(SUBARCH)
 ifneq ($(CONFIG_GPROF),y)
 ARCH_CFLAGS += -DUM_FASTCALL
 endif
-
-SYS_UTIL_DIR    := $(ARCH_DIR)/sys-i386/util
-SYS_HEADERS     := $(SYS_DIR)/sc.h $(SYS_DIR)/thread.h
-
-prepare: $(SYS_HEADERS)
-
-$(SYS_DIR)/sc.h: $(SYS_UTIL_DIR)/mk_sc
-        $(call filechk,gen_header)
-
-$(SYS_DIR)/thread.h: $(SYS_UTIL_DIR)/mk_thread 
-        $(call filechk,gen_header)
-
-$(SYS_UTIL_DIR)/mk_sc: scripts_basic $(ARCH_DIR)/user-offsets.h FORCE
-        $(Q)$(MAKE) $(build)=$(SYS_UTIL_DIR) $@
-
-$(SYS_UTIL_DIR)/mk_thread: scripts_basic $(ARCH_DIR)/kernel-offsets.h FORCE
-        $(Q)$(MAKE) $(build)=$(SYS_UTIL_DIR) $@
-
-$(SYS_UTIL_DIR): scripts_basic include/asm FORCE
-        $(Q)$(MAKE) $(build)=$(SYS_UTIL_DIR)
-
-CLEAN_FILES += $(SYS_HEADERS)
diff --git a/arch/um/Makefile-skas b/arch/um/Makefile-skas
index fd18ec572271..ac35de5316a6 100644
--- a/arch/um/Makefile-skas
+++ b/arch/um/Makefile-skas
@@ -10,5 +10,3 @@ CFLAGS-$(CONFIG_GCOV) += $(GCOV_OPT)
 CFLAGS-$(CONFIG_GPROF) += $(GPROF_OPT)
 LINK-$(CONFIG_GCOV) += $(GCOV_OPT)
 LINK-$(CONFIG_GPROF) += $(GPROF_OPT)
-
-GEN_HEADERS += $(ARCH_DIR)/include/skas_ptregs.h
diff --git a/arch/um/Makefile-x86_64 b/arch/um/Makefile-x86_64
index 436abbba409b..4f118d5cc2ee 100644
--- a/arch/um/Makefile-x86_64
+++ b/arch/um/Makefile-x86_64
@@ -12,24 +12,3 @@ CHECKFLAGS  += -m64
 
 ELF_ARCH := i386:x86-64
 ELF_FORMAT := elf64-x86-64
-
-SYS_UTIL_DIR := $(ARCH_DIR)/sys-x86_64/util
-SYS_DIR := $(ARCH_DIR)/include/sysdep-x86_64
-
-SYS_HEADERS = $(SYS_DIR)/sc.h $(SYS_DIR)/thread.h
-
-prepare: $(SYS_HEADERS)
-
-$(SYS_DIR)/sc.h: $(SYS_UTIL_DIR)/mk_sc
-        $(call filechk,gen_header)
-
-$(SYS_DIR)/thread.h: $(SYS_UTIL_DIR)/mk_thread
-        $(call filechk,gen_header)
-
-$(SYS_UTIL_DIR)/mk_sc: scripts_basic $(ARCH_DIR)/user-offsets.h FORCE
-        $(Q)$(MAKE) $(build)=$(SYS_UTIL_DIR) $@
-
-$(SYS_UTIL_DIR)/mk_thread: scripts_basic $(GEN_HEADERS) $(ARCH_DIR)/kernel-offsets.h FORCE
-        $(Q)$(MAKE) $(build)=$(SYS_UTIL_DIR) $@
-
-CLEAN_FILES += $(SYS_HEADERS)
diff --git a/arch/um/drivers/mconsole_user.c b/arch/um/drivers/mconsole_user.c
index 04383f98f4d5..310c1f823f26 100644
--- a/arch/um/drivers/mconsole_user.c
+++ b/arch/um/drivers/mconsole_user.c
@@ -23,7 +23,7 @@ static struct mconsole_command commands[] = {
         { "reboot", mconsole_reboot, MCONSOLE_PROC },
         { "config", mconsole_config, MCONSOLE_PROC },
         { "remove", mconsole_remove, MCONSOLE_PROC },
-        { "sysrq", mconsole_sysrq, MCONSOLE_PROC },
+        { "sysrq", mconsole_sysrq, MCONSOLE_INTR },
         { "help", mconsole_help, MCONSOLE_INTR },
         { "cad", mconsole_cad, MCONSOLE_INTR },
         { "stop", mconsole_stop, MCONSOLE_PROC },
diff --git a/arch/um/drivers/port_kern.c b/arch/um/drivers/port_kern.c
index c41efd207fcc..189839e4f1d4 100644
--- a/arch/um/drivers/port_kern.c
+++ b/arch/um/drivers/port_kern.c
@@ -7,7 +7,6 @@
 #include "linux/sched.h"
 #include "linux/slab.h"
 #include "linux/interrupt.h"
-#include "linux/irq.h"
 #include "linux/spinlock.h"
 #include "linux/errno.h"
 #include "asm/atomic.h"
diff --git a/arch/um/include/common-offsets.h b/arch/um/include/common-offsets.h
index 782ac3a3baf9..356390d1f8b9 100644
--- a/arch/um/include/common-offsets.h
+++ b/arch/um/include/common-offsets.h
@@ -1,7 +1,7 @@
 /* for use by sys-$SUBARCH/kernel-offsets.c */
 
-OFFSET(TASK_REGS, task_struct, thread.regs);
-OFFSET(TASK_PID, task_struct, pid);
+OFFSET(HOST_TASK_REGS, task_struct, thread.regs);
+OFFSET(HOST_TASK_PID, task_struct, pid);
 DEFINE(UM_KERN_PAGE_SIZE, PAGE_SIZE);
 DEFINE(UM_NSEC_PER_SEC, NSEC_PER_SEC);
 DEFINE_STR(UM_KERN_EMERG, KERN_EMERG);
diff --git a/arch/um/include/os.h b/arch/um/include/os.h
index 583329d0a539..6f766e1faecc 100644
--- a/arch/um/include/os.h
+++ b/arch/um/include/os.h
@@ -157,6 +157,10 @@ extern int os_lock_file(int fd, int excl);
 extern void os_early_checks(void);
 extern int can_do_skas(void);
 
+/* Make sure they are clear when running in TT mode. Required by
+ * SEGV_MAYBE_FIXABLE */
+#define clear_can_do_skas() do { ptrace_faultinfo = proc_mm = 0; } while (0)
+
 /* mem.c */
 extern int create_mem_file(unsigned long len);
 
diff --git a/arch/um/include/skas_ptregs.h b/arch/um/include/skas_ptregs.h
new file mode 100644
index 000000000000..73db19e9c077
--- /dev/null
+++ b/arch/um/include/skas_ptregs.h
@@ -0,0 +1,6 @@
+#ifndef __SKAS_PT_REGS_
+#define __SKAS_PT_REGS_
+
+#include <user_constants.h>
+
+#endif
diff --git a/arch/um/include/sysdep-i386/sc.h b/arch/um/include/sysdep-i386/sc.h
new file mode 100644
index 000000000000..c57d1780ad37
--- /dev/null
+++ b/arch/um/include/sysdep-i386/sc.h
@@ -0,0 +1,44 @@
+#ifndef __SYSDEP_I386_SC_H
+#define __SYSDEP_I386_SC_H
+
+#include <user_constants.h>
+
+#define SC_OFFSET(sc, field) \
+        *((unsigned long *) &(((char *) (sc))[HOST_##field]))
+#define SC_FP_OFFSET(sc, field) \
+        *((unsigned long *) &(((char *) (SC_FPSTATE(sc)))[HOST_##field]))
+#define SC_FP_OFFSET_PTR(sc, field, type) \
+        ((type *) &(((char *) (SC_FPSTATE(sc)))[HOST_##field]))
+
+#define SC_IP(sc) SC_OFFSET(sc, SC_IP)
+#define SC_SP(sc) SC_OFFSET(sc, SC_SP)
+#define SC_FS(sc) SC_OFFSET(sc, SC_FS)
+#define SC_GS(sc) SC_OFFSET(sc, SC_GS)
+#define SC_DS(sc) SC_OFFSET(sc, SC_DS)
+#define SC_ES(sc) SC_OFFSET(sc, SC_ES)
+#define SC_SS(sc) SC_OFFSET(sc, SC_SS)
+#define SC_CS(sc) SC_OFFSET(sc, SC_CS)
+#define SC_EFLAGS(sc) SC_OFFSET(sc, SC_EFLAGS)
+#define SC_EAX(sc) SC_OFFSET(sc, SC_EAX)
+#define SC_EBX(sc) SC_OFFSET(sc, SC_EBX)
+#define SC_ECX(sc) SC_OFFSET(sc, SC_ECX)
+#define SC_EDX(sc) SC_OFFSET(sc, SC_EDX)
+#define SC_EDI(sc) SC_OFFSET(sc, SC_EDI)
+#define SC_ESI(sc) SC_OFFSET(sc, SC_ESI)
+#define SC_EBP(sc) SC_OFFSET(sc, SC_EBP)
+#define SC_TRAPNO(sc) SC_OFFSET(sc, SC_TRAPNO)
+#define SC_ERR(sc) SC_OFFSET(sc, SC_ERR)
+#define SC_CR2(sc) SC_OFFSET(sc, SC_CR2)
+#define SC_FPSTATE(sc) SC_OFFSET(sc, SC_FPSTATE)
+#define SC_SIGMASK(sc) SC_OFFSET(sc, SC_SIGMASK)
+#define SC_FP_CW(sc) SC_FP_OFFSET(sc, SC_FP_CW)
+#define SC_FP_SW(sc) SC_FP_OFFSET(sc, SC_FP_SW)
+#define SC_FP_TAG(sc) SC_FP_OFFSET(sc, SC_FP_TAG)
+#define SC_FP_IPOFF(sc) SC_FP_OFFSET(sc, SC_FP_IPOFF)
+#define SC_FP_CSSEL(sc) SC_FP_OFFSET(sc, SC_FP_CSSEL)
+#define SC_FP_DATAOFF(sc) SC_FP_OFFSET(sc, SC_FP_DATAOFF)
+#define SC_FP_DATASEL(sc) SC_FP_OFFSET(sc, SC_FP_DATASEL)
+#define SC_FP_ST(sc) SC_FP_OFFSET_PTR(sc, SC_FP_ST, struct _fpstate)
+#define SC_FXSR_ENV(sc) SC_FP_OFFSET_PTR(sc, SC_FXSR_ENV, void)
+
+#endif
diff --git a/arch/um/include/sysdep-i386/sigcontext.h b/arch/um/include/sysdep-i386/sigcontext.h
index 1fe729265167..23fd2644d7ed 100644
--- a/arch/um/include/sysdep-i386/sigcontext.h
+++ b/arch/um/include/sysdep-i386/sigcontext.h
@@ -6,6 +6,7 @@
 #ifndef __SYS_SIGCONTEXT_I386_H
 #define __SYS_SIGCONTEXT_I386_H
 
+#include "uml-config.h"
 #include <sysdep/sc.h>
 
 #define IP_RESTART_SYSCALL(ip) ((ip) -= 2)
@@ -26,7 +27,14 @@
 #define SC_START_SYSCALL(sc) do SC_EAX(sc) = -ENOSYS; while(0)
 
 /* This is Page Fault */
-#define SEGV_IS_FIXABLE(fi) ((fi)->trap_no == 14)
+#define SEGV_IS_FIXABLE(fi)     ((fi)->trap_no == 14)
+
+/* SKAS3 has no trap_no on i386, but get_skas_faultinfo() sets it to 0. */
+#ifdef UML_CONFIG_MODE_SKAS
+#define SEGV_MAYBE_FIXABLE(fi)  ((fi)->trap_no == 0 && ptrace_faultinfo)
+#else
+#define SEGV_MAYBE_FIXABLE(fi)  0
+#endif
 
 extern unsigned long *sc_sigmask(void *sc_ptr);
 extern int sc_get_fpregs(unsigned long buf, void *sc_ptr);
diff --git a/arch/um/include/sysdep-i386/thread.h b/arch/um/include/sysdep-i386/thread.h
new file mode 100644
index 000000000000..e2bd6bae8b8a
--- /dev/null
+++ b/arch/um/include/sysdep-i386/thread.h
@@ -0,0 +1,11 @@
+#ifndef __UM_THREAD_H
+#define __UM_THREAD_H
+
+#include <kern_constants.h>
+
+#define TASK_DEBUGREGS(task) ((unsigned long *) &(((char *) (task))[HOST_TASK_DEBUGREGS]))
+#ifdef CONFIG_MODE_TT
+#define TASK_EXTERN_PID(task) *((int *) &(((char *) (task))[HOST_TASK_EXTERN_PID]))
+#endif
+
+#endif
diff --git a/arch/um/include/sysdep-x86_64/sc.h b/arch/um/include/sysdep-x86_64/sc.h
new file mode 100644
index 000000000000..a160d9fcc596
--- /dev/null
+++ b/arch/um/include/sysdep-x86_64/sc.h
@@ -0,0 +1,45 @@
+#ifndef __SYSDEP_X86_64_SC_H
+#define __SYSDEP_X86_64_SC_H
+
+/* Copyright (C) 2003 - 2004 PathScale, Inc
+ * Released under the GPL
+ */
+
+#include <user_constants.h>
+
+#define SC_OFFSET(sc, field) \
+         *((unsigned long *) &(((char *) (sc))[HOST_##field]))
+
+#define SC_RBX(sc) SC_OFFSET(sc, SC_RBX)
+#define SC_RCX(sc) SC_OFFSET(sc, SC_RCX)
+#define SC_RDX(sc) SC_OFFSET(sc, SC_RDX)
+#define SC_RSI(sc) SC_OFFSET(sc, SC_RSI)
+#define SC_RDI(sc) SC_OFFSET(sc, SC_RDI)
+#define SC_RBP(sc) SC_OFFSET(sc, SC_RBP)
+#define SC_RAX(sc) SC_OFFSET(sc, SC_RAX)
+#define SC_R8(sc) SC_OFFSET(sc, SC_R8)
+#define SC_R9(sc) SC_OFFSET(sc, SC_R9)
+#define SC_R10(sc) SC_OFFSET(sc, SC_R10)
+#define SC_R11(sc) SC_OFFSET(sc, SC_R11)
+#define SC_R12(sc) SC_OFFSET(sc, SC_R12)
+#define SC_R13(sc) SC_OFFSET(sc, SC_R13)
+#define SC_R14(sc) SC_OFFSET(sc, SC_R14)
+#define SC_R15(sc) SC_OFFSET(sc, SC_R15)
+#define SC_IP(sc) SC_OFFSET(sc, SC_IP)
+#define SC_SP(sc) SC_OFFSET(sc, SC_SP)
+#define SC_CR2(sc) SC_OFFSET(sc, SC_CR2)
+#define SC_ERR(sc) SC_OFFSET(sc, SC_ERR)
+#define SC_TRAPNO(sc) SC_OFFSET(sc, SC_TRAPNO)
+#define SC_CS(sc) SC_OFFSET(sc, SC_CS)
+#define SC_FS(sc) SC_OFFSET(sc, SC_FS)
+#define SC_GS(sc) SC_OFFSET(sc, SC_GS)
+#define SC_EFLAGS(sc) SC_OFFSET(sc, SC_EFLAGS)
+#define SC_SIGMASK(sc) SC_OFFSET(sc, SC_SIGMASK)
+#if 0
+#define SC_ORIG_RAX(sc) SC_OFFSET(sc, SC_ORIG_RAX)
+#define SC_DS(sc) SC_OFFSET(sc, SC_DS)
+#define SC_ES(sc) SC_OFFSET(sc, SC_ES)
+#define SC_SS(sc) SC_OFFSET(sc, SC_SS)
+#endif
+
+#endif
diff --git a/arch/um/include/sysdep-x86_64/sigcontext.h b/arch/um/include/sysdep-x86_64/sigcontext.h
index 2a78260d15a0..41073235e7ad 100644
--- a/arch/um/include/sysdep-x86_64/sigcontext.h
+++ b/arch/um/include/sysdep-x86_64/sigcontext.h
@@ -31,7 +31,10 @@
 #define SC_START_SYSCALL(sc) do SC_RAX(sc) = -ENOSYS; while(0)
 
 /* This is Page Fault */
-#define SEGV_IS_FIXABLE(fi) ((fi)->trap_no == 14)
+#define SEGV_IS_FIXABLE(fi)     ((fi)->trap_no == 14)
+
+/* No broken SKAS API, which doesn't pass trap_no, here. */
+#define SEGV_MAYBE_FIXABLE(fi)  0
 
 extern unsigned long *sc_sigmask(void *sc_ptr);
 
diff --git a/arch/um/include/sysdep-x86_64/thread.h b/arch/um/include/sysdep-x86_64/thread.h
new file mode 100644
index 000000000000..6a76a7f3683f
--- /dev/null
+++ b/arch/um/include/sysdep-x86_64/thread.h
@@ -0,0 +1,10 @@
+#ifndef __UM_THREAD_H
+#define __UM_THREAD_H
+
+#include <kern_constants.h>
+
+#ifdef CONFIG_MODE_TT
+#define TASK_EXTERN_PID(task) *((int *) &(((char *) (task))[HOST_TASK_EXTERN_PID]))
+#endif
+
+#endif
diff --git a/arch/um/include/task.h b/arch/um/include/task.h
new file mode 100644
index 000000000000..6375ba7203c9
--- /dev/null
+++ b/arch/um/include/task.h
@@ -0,0 +1,9 @@
+#ifndef __TASK_H
+#define __TASK_H
+
+#include <kern_constants.h>
+
+#define TASK_REGS(task) ((union uml_pt_regs *) &(((char *) (task))[HOST_TASK_REGS]))
+#define TASK_PID(task) *((int *) &(((char *) (task))[HOST_TASK_PID]))
+
+#endif
diff --git a/arch/um/kernel/irq.c b/arch/um/kernel/irq.c
index dcd814971995..bbf94bf2921e 100644
--- a/arch/um/kernel/irq.c
+++ b/arch/um/kernel/irq.c
@@ -9,7 +9,6 @@
 #include "linux/kernel.h"
 #include "linux/module.h"
 #include "linux/smp.h"
-#include "linux/irq.h"
 #include "linux/kernel_stat.h"
 #include "linux/interrupt.h"
 #include "linux/random.h"
diff --git a/arch/um/kernel/skas/Makefile b/arch/um/kernel/skas/Makefile
index db36c7c95940..8de471b59c1c 100644
--- a/arch/um/kernel/skas/Makefile
+++ b/arch/um/kernel/skas/Makefile
@@ -6,8 +6,6 @@
 obj-y := clone.o exec_kern.o mem.o mem_user.o mmu.o process.o process_kern.o \
         syscall.o tlb.o trap_user.o uaccess.o
 
-subdir- := util
-
 USER_OBJS := process.o clone.o
 
 include arch/um/scripts/Makefile.rules
diff --git a/arch/um/kernel/skas/util/Makefile b/arch/um/kernel/skas/util/Makefile
deleted file mode 100644
index f7b7eba83340..000000000000
--- a/arch/um/kernel/skas/util/Makefile
+++ /dev/null
@@ -1,5 +0,0 @@
-hostprogs-y             := mk_ptregs
-always                  := $(hostprogs-y)
-
-mk_ptregs-objs := mk_ptregs-$(SUBARCH).o
-HOSTCFLAGS_mk_ptregs-$(SUBARCH).o := -I$(objtree)/arch/um
diff --git a/arch/um/kernel/skas/util/mk_ptregs-i386.c b/arch/um/kernel/skas/util/mk_ptregs-i386.c
deleted file mode 100644
index 1f96e1eeb8a7..000000000000
--- a/arch/um/kernel/skas/util/mk_ptregs-i386.c
+++ /dev/null
@@ -1,49 +0,0 @@
-#include <stdio.h>
-#include <user-offsets.h>
-
-#define SHOW(name) printf("#define %s %d\n", #name, name)
-
-int main(int argc, char **argv)
-{
-        printf("/* Automatically generated by "
-               "arch/um/kernel/skas/util/mk_ptregs */\n");
-        printf("\n");
-        printf("#ifndef __SKAS_PT_REGS_\n");
-        printf("#define __SKAS_PT_REGS_\n");
-        printf("\n");
-        SHOW(HOST_FRAME_SIZE);
-        SHOW(HOST_FP_SIZE);
-        SHOW(HOST_XFP_SIZE);
-
-        SHOW(HOST_IP);
-        SHOW(HOST_SP);
-        SHOW(HOST_EFLAGS);
-        SHOW(HOST_EAX);
-        SHOW(HOST_EBX);
-        SHOW(HOST_ECX);
-        SHOW(HOST_EDX);
-        SHOW(HOST_ESI);
-        SHOW(HOST_EDI);
-        SHOW(HOST_EBP);
-        SHOW(HOST_CS);
-        SHOW(HOST_SS);
-        SHOW(HOST_DS);
-        SHOW(HOST_FS);
-        SHOW(HOST_ES);
-        SHOW(HOST_GS);
-
-        printf("\n");
-        printf("#endif\n");
-        return(0);
-}
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only.  This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
diff --git a/arch/um/kernel/skas/util/mk_ptregs-x86_64.c b/arch/um/kernel/skas/util/mk_ptregs-x86_64.c
deleted file mode 100644
index 5fccbfe35f78..000000000000
--- a/arch/um/kernel/skas/util/mk_ptregs-x86_64.c
+++ /dev/null
@@ -1,66 +0,0 @@
-/*
- * Copyright 2003 PathScale, Inc.
- *
- * Licensed under the GPL
- */
-
-#include <stdio.h>
-#include <user-offsets.h>
-
-#define SHOW(name) \
-        printf("#define %s (%d / sizeof(unsigned long))\n", #name, name)
-
-int main(int argc, char **argv)
-{
-        printf("/* Automatically generated by "
-               "arch/um/kernel/skas/util/mk_ptregs */\n");
-        printf("\n");
-        printf("#ifndef __SKAS_PT_REGS_\n");
-        printf("#define __SKAS_PT_REGS_\n");
-        SHOW(HOST_FRAME_SIZE);
-        SHOW(HOST_RBX);
-        SHOW(HOST_RCX);
-        SHOW(HOST_RDI);
-        SHOW(HOST_RSI);
-        SHOW(HOST_RDX);
-        SHOW(HOST_RBP);
-        SHOW(HOST_RAX);
-        SHOW(HOST_R8);
-        SHOW(HOST_R9);
-        SHOW(HOST_R10);
-        SHOW(HOST_R11);
-        SHOW(HOST_R12);
-        SHOW(HOST_R13);
-        SHOW(HOST_R14);
-        SHOW(HOST_R15);
-        SHOW(HOST_ORIG_RAX);
-        SHOW(HOST_CS);
-        SHOW(HOST_SS);
-        SHOW(HOST_EFLAGS);
-#if 0
-        SHOW(HOST_FS);
-        SHOW(HOST_GS);
-        SHOW(HOST_DS);
-        SHOW(HOST_ES);
-#endif
-
-        SHOW(HOST_IP);
-        SHOW(HOST_SP);
-        printf("#define HOST_FP_SIZE 0\n");
-        printf("#define HOST_XFP_SIZE 0\n");
-        printf("\n");
-        printf("\n");
-        printf("#endif\n");
-        return(0);
-}
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only.  This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
diff --git a/arch/um/kernel/trap_kern.c b/arch/um/kernel/trap_kern.c
index d297429ac360..95c8f8733baf 100644
--- a/arch/um/kernel/trap_kern.c
+++ b/arch/um/kernel/trap_kern.c
@@ -26,6 +26,9 @@
 #include "mconsole_kern.h"
 #include "mem.h"
 #include "mem_kern.h"
+#ifdef CONFIG_MODE_SKAS
+#include "skas.h"
+#endif
 
 /* Note this is constrained to return 0, -EFAULT, -EACCESS, -ENOMEM by segv(). */
 int handle_page_fault(unsigned long address, unsigned long ip, 
@@ -134,7 +137,7 @@ unsigned long segv(struct faultinfo fi, unsigned long ip, int is_user, void *sc)
         else if(current->mm == NULL)
                 panic("Segfault with no mm");
 
-        if (SEGV_IS_FIXABLE(&fi))
+        if (SEGV_IS_FIXABLE(&fi) || SEGV_MAYBE_FIXABLE(&fi))
                 err = handle_page_fault(address, ip, is_write, is_user, &si.si_code);
         else {
                 err = -EFAULT;
diff --git a/arch/um/kernel/um_arch.c b/arch/um/kernel/um_arch.c
index f0a275947d34..93dc782dc1cc 100644
--- a/arch/um/kernel/um_arch.c
+++ b/arch/um/kernel/um_arch.c
@@ -334,6 +334,8 @@ int linux_main(int argc, char **argv)
                 add_arg(DEFAULT_COMMAND_LINE);
 
         os_early_checks();
+        if (force_tt)
+                clear_can_do_skas();
         mode_tt = force_tt ? 1 : !can_do_skas();
 #ifndef CONFIG_MODE_TT
         if (mode_tt) {
diff --git a/arch/um/os-Linux/elf_aux.c b/arch/um/os-Linux/elf_aux.c
index ab33cb3c74ec..5a99dd3fbed0 100644
--- a/arch/um/os-Linux/elf_aux.c
+++ b/arch/um/os-Linux/elf_aux.c
@@ -12,7 +12,7 @@
 #include "init.h"
 #include "elf_user.h"
 #include "mem_user.h"
-#include <kernel-offsets.h>
+#include <kern_constants.h>
 
 /* Use the one from the kernel - the host may miss it, if having old headers. */
 #if UM_ELF_CLASS == UM_ELFCLASS32
diff --git a/arch/um/os-Linux/util/Makefile b/arch/um/os-Linux/util/Makefile
deleted file mode 100644
index 9778aed0c314..000000000000
--- a/arch/um/os-Linux/util/Makefile
+++ /dev/null
@@ -1,4 +0,0 @@
-hostprogs-y             := mk_user_constants
-always                  := $(hostprogs-y)
-
-HOSTCFLAGS_mk_user_constants.o := -I$(objtree)/arch/um
diff --git a/arch/um/os-Linux/util/mk_user_constants.c b/arch/um/os-Linux/util/mk_user_constants.c
deleted file mode 100644
index 4838f30eecf0..000000000000
--- a/arch/um/os-Linux/util/mk_user_constants.c
+++ /dev/null
@@ -1,23 +0,0 @@
-#include <stdio.h>
-#include <user-offsets.h>
-
-int main(int argc, char **argv)
-{
-  printf("/*\n");
-  printf(" * Generated by mk_user_constants\n");
-  printf(" */\n");
-  printf("\n");
-  printf("#ifndef __UM_USER_CONSTANTS_H\n");
-  printf("#define __UM_USER_CONSTANTS_H\n");
-  printf("\n");
-  /* I'd like to use FRAME_SIZE from ptrace.h here, but that's wrong on
-   * x86_64 (216 vs 168 bytes).  user_regs_struct is the correct size on
-   * both x86_64 and i386.
-   */
-  printf("#define UM_FRAME_SIZE %d\n", __UM_FRAME_SIZE);
-
-  printf("\n");
-  printf("#endif\n");
-
-  return(0);
-}
diff --git a/arch/um/sys-i386/Makefile b/arch/um/sys-i386/Makefile
index 4ca2a229da49..6dfeb70f6957 100644
--- a/arch/um/sys-i386/Makefile
+++ b/arch/um/sys-i386/Makefile
@@ -18,6 +18,4 @@ module.c-dir = kernel
 
 $(obj)/stub_segv.o : _c_flags = $(call unprofile,$(CFLAGS))
 
-subdir- := util
-
 include arch/um/scripts/Makefile.unmap
diff --git a/arch/um/sys-i386/kernel-offsets.c b/arch/um/sys-i386/kernel-offsets.c
index a1070af2bcd8..35db85057506 100644
--- a/arch/um/sys-i386/kernel-offsets.c
+++ b/arch/um/sys-i386/kernel-offsets.c
@@ -18,9 +18,9 @@
 
 void foo(void)
 {
-        OFFSET(TASK_DEBUGREGS, task_struct, thread.arch.debugregs);
+        OFFSET(HOST_TASK_DEBUGREGS, task_struct, thread.arch.debugregs);
 #ifdef CONFIG_MODE_TT
-        OFFSET(TASK_EXTERN_PID, task_struct, thread.mode.tt.extern_pid);
+        OFFSET(HOST_TASK_EXTERN_PID, task_struct, thread.mode.tt.extern_pid);
 #endif
 #include <common-offsets.h>
 }
diff --git a/arch/um/sys-i386/user-offsets.c b/arch/um/sys-i386/user-offsets.c
index 3ceaabceb3d7..677fc26a9bbe 100644
--- a/arch/um/sys-i386/user-offsets.c
+++ b/arch/um/sys-i386/user-offsets.c
@@ -7,47 +7,48 @@
 #define DEFINE(sym, val) \
         asm volatile("\n->" #sym " %0 " #val : : "i" (val))
 
+#define DEFINE_LONGS(sym, val) \
+        asm volatile("\n->" #sym " %0 " #val : : "i" (val/sizeof(unsigned long)))
+
 #define OFFSET(sym, str, mem) \
         DEFINE(sym, offsetof(struct str, mem));
 
 void foo(void)
 {
-        OFFSET(SC_IP, sigcontext, eip);
-        OFFSET(SC_SP, sigcontext, esp);
-        OFFSET(SC_FS, sigcontext, fs);
-        OFFSET(SC_GS, sigcontext, gs);
-        OFFSET(SC_DS, sigcontext, ds);
-        OFFSET(SC_ES, sigcontext, es);
-        OFFSET(SC_SS, sigcontext, ss);
-        OFFSET(SC_CS, sigcontext, cs);
-        OFFSET(SC_EFLAGS, sigcontext, eflags);
-        OFFSET(SC_EAX, sigcontext, eax);
-        OFFSET(SC_EBX, sigcontext, ebx);
-        OFFSET(SC_ECX, sigcontext, ecx);
-        OFFSET(SC_EDX, sigcontext, edx);
-        OFFSET(SC_EDI, sigcontext, edi);
-        OFFSET(SC_ESI, sigcontext, esi);
-        OFFSET(SC_EBP, sigcontext, ebp);
-        OFFSET(SC_TRAPNO, sigcontext, trapno);
-        OFFSET(SC_ERR, sigcontext, err);
-        OFFSET(SC_CR2, sigcontext, cr2);
-        OFFSET(SC_FPSTATE, sigcontext, fpstate);
-        OFFSET(SC_SIGMASK, sigcontext, oldmask);
-        OFFSET(SC_FP_CW, _fpstate, cw);
-        OFFSET(SC_FP_SW, _fpstate, sw);
-        OFFSET(SC_FP_TAG, _fpstate, tag);
-        OFFSET(SC_FP_IPOFF, _fpstate, ipoff);
-        OFFSET(SC_FP_CSSEL, _fpstate, cssel);
-        OFFSET(SC_FP_DATAOFF, _fpstate, dataoff);
-        OFFSET(SC_FP_DATASEL, _fpstate, datasel);
-        OFFSET(SC_FP_ST, _fpstate, _st);
-        OFFSET(SC_FXSR_ENV, _fpstate, _fxsr_env);
+        OFFSET(HOST_SC_IP, sigcontext, eip);
+        OFFSET(HOST_SC_SP, sigcontext, esp);
+        OFFSET(HOST_SC_FS, sigcontext, fs);
+        OFFSET(HOST_SC_GS, sigcontext, gs);
+        OFFSET(HOST_SC_DS, sigcontext, ds);
+        OFFSET(HOST_SC_ES, sigcontext, es);
+        OFFSET(HOST_SC_SS, sigcontext, ss);
+        OFFSET(HOST_SC_CS, sigcontext, cs);
+        OFFSET(HOST_SC_EFLAGS, sigcontext, eflags);
+        OFFSET(HOST_SC_EAX, sigcontext, eax);
+        OFFSET(HOST_SC_EBX, sigcontext, ebx);
+        OFFSET(HOST_SC_ECX, sigcontext, ecx);
+        OFFSET(HOST_SC_EDX, sigcontext, edx);
+        OFFSET(HOST_SC_EDI, sigcontext, edi);
+        OFFSET(HOST_SC_ESI, sigcontext, esi);
+        OFFSET(HOST_SC_EBP, sigcontext, ebp);
+        OFFSET(HOST_SC_TRAPNO, sigcontext, trapno);
+        OFFSET(HOST_SC_ERR, sigcontext, err);
+        OFFSET(HOST_SC_CR2, sigcontext, cr2);
+        OFFSET(HOST_SC_FPSTATE, sigcontext, fpstate);
+        OFFSET(HOST_SC_SIGMASK, sigcontext, oldmask);
+        OFFSET(HOST_SC_FP_CW, _fpstate, cw);
+        OFFSET(HOST_SC_FP_SW, _fpstate, sw);
+        OFFSET(HOST_SC_FP_TAG, _fpstate, tag);
+        OFFSET(HOST_SC_FP_IPOFF, _fpstate, ipoff);
+        OFFSET(HOST_SC_FP_CSSEL, _fpstate, cssel);
+        OFFSET(HOST_SC_FP_DATAOFF, _fpstate, dataoff);
+        OFFSET(HOST_SC_FP_DATASEL, _fpstate, datasel);
+        OFFSET(HOST_SC_FP_ST, _fpstate, _st);
+        OFFSET(HOST_SC_FXSR_ENV, _fpstate, _fxsr_env);
 
-        DEFINE(HOST_FRAME_SIZE, FRAME_SIZE);
-        DEFINE(HOST_FP_SIZE,
-                sizeof(struct user_i387_struct) / sizeof(unsigned long));
-        DEFINE(HOST_XFP_SIZE,
-               sizeof(struct user_fxsr_struct) / sizeof(unsigned long));
+        DEFINE_LONGS(HOST_FRAME_SIZE, FRAME_SIZE);
+        DEFINE_LONGS(HOST_FP_SIZE, sizeof(struct user_i387_struct));
+        DEFINE_LONGS(HOST_XFP_SIZE, sizeof(struct user_fxsr_struct));
 
         DEFINE(HOST_IP, EIP);
         DEFINE(HOST_SP, UESP);
@@ -65,5 +66,5 @@ void foo(void)
         DEFINE(HOST_FS, FS);
         DEFINE(HOST_ES, ES);
         DEFINE(HOST_GS, GS);
-        DEFINE(__UM_FRAME_SIZE, sizeof(struct user_regs_struct));
+        DEFINE(UM_FRAME_SIZE, sizeof(struct user_regs_struct));
 }
diff --git a/arch/um/sys-i386/util/Makefile b/arch/um/sys-i386/util/Makefile
deleted file mode 100644
index bf61afd0b045..000000000000
--- a/arch/um/sys-i386/util/Makefile
+++ /dev/null
@@ -1,5 +0,0 @@
-hostprogs-y     := mk_sc mk_thread
-always          := $(hostprogs-y)
-
-HOSTCFLAGS_mk_sc.o := -I$(objtree)/arch/um
-HOSTCFLAGS_mk_thread.o := -I$(objtree)/arch/um
diff --git a/arch/um/sys-i386/util/mk_sc.c b/arch/um/sys-i386/util/mk_sc.c
deleted file mode 100644
index 04c0d73433aa..000000000000
--- a/arch/um/sys-i386/util/mk_sc.c
+++ /dev/null
@@ -1,51 +0,0 @@
-#include <stdio.h>
-#include <user-offsets.h>
-
-#define SC_OFFSET(name, field) \
-  printf("#define " #name "(sc) *((unsigned long *) &(((char *) (sc))[%d]))\n",\
-         name)
-
-#define SC_FP_OFFSET(name, field) \
-  printf("#define " #name \
-         "(sc) *((unsigned long *) &(((char *) (SC_FPSTATE(sc)))[%d]))\n",\
-         name)
-
-#define SC_FP_OFFSET_PTR(name, field, type) \
-  printf("#define " #name \
-         "(sc) ((" type " *) &(((char *) (SC_FPSTATE(sc)))[%d]))\n",\
-         name)
-
-int main(int argc, char **argv)
-{
-  SC_OFFSET(SC_IP, eip);
-  SC_OFFSET(SC_SP, esp);
-  SC_OFFSET(SC_FS, fs);
-  SC_OFFSET(SC_GS, gs);
-  SC_OFFSET(SC_DS, ds);
-  SC_OFFSET(SC_ES, es);
-  SC_OFFSET(SC_SS, ss);
-  SC_OFFSET(SC_CS, cs);
-  SC_OFFSET(SC_EFLAGS, eflags);
-  SC_OFFSET(SC_EAX, eax);
-  SC_OFFSET(SC_EBX, ebx);
-  SC_OFFSET(SC_ECX, ecx);
-  SC_OFFSET(SC_EDX, edx);
-  SC_OFFSET(SC_EDI, edi);
-  SC_OFFSET(SC_ESI, esi);
-  SC_OFFSET(SC_EBP, ebp);
-  SC_OFFSET(SC_TRAPNO, trapno);
-  SC_OFFSET(SC_ERR, err);
-  SC_OFFSET(SC_CR2, cr2);
-  SC_OFFSET(SC_FPSTATE, fpstate);
-  SC_OFFSET(SC_SIGMASK, oldmask);
-  SC_FP_OFFSET(SC_FP_CW, cw);
-  SC_FP_OFFSET(SC_FP_SW, sw);
-  SC_FP_OFFSET(SC_FP_TAG, tag);
-  SC_FP_OFFSET(SC_FP_IPOFF, ipoff);
-  SC_FP_OFFSET(SC_FP_CSSEL, cssel);
-  SC_FP_OFFSET(SC_FP_DATAOFF, dataoff);
-  SC_FP_OFFSET(SC_FP_DATASEL, datasel);
-  SC_FP_OFFSET_PTR(SC_FP_ST, _st, "struct _fpstate");
-  SC_FP_OFFSET_PTR(SC_FXSR_ENV, _fxsr_env, "void");
-  return(0);
-}
diff --git a/arch/um/sys-i386/util/mk_thread.c b/arch/um/sys-i386/util/mk_thread.c
deleted file mode 100644
index 7470d0dda67e..000000000000
--- a/arch/um/sys-i386/util/mk_thread.c
+++ /dev/null
@@ -1,22 +0,0 @@
-#include <stdio.h>
-#include <kernel-offsets.h>
-
-int main(int argc, char **argv)
-{
-  printf("/*\n");
-  printf(" * Generated by mk_thread\n");
-  printf(" */\n");
-  printf("\n");
-  printf("#ifndef __UM_THREAD_H\n");
-  printf("#define __UM_THREAD_H\n");
-  printf("\n");
-  printf("#define TASK_DEBUGREGS(task) ((unsigned long *) "
-         "&(((char *) (task))[%d]))\n", TASK_DEBUGREGS);
-#ifdef TASK_EXTERN_PID
-  printf("#define TASK_EXTERN_PID(task) *((int *) &(((char *) (task))[%d]))\n",
-         TASK_EXTERN_PID);
-#endif
-  printf("\n");
-  printf("#endif\n");
-  return(0);
-}
diff --git a/arch/um/sys-x86_64/Makefile b/arch/um/sys-x86_64/Makefile
index f0ab574d1e95..06c3633457a2 100644
--- a/arch/um/sys-x86_64/Makefile
+++ b/arch/um/sys-x86_64/Makefile
@@ -29,6 +29,4 @@ module.c-dir = kernel
 
 $(obj)/stub_segv.o: _c_flags = $(call unprofile,$(CFLAGS))
 
-subdir- := util
-
 include arch/um/scripts/Makefile.unmap
diff --git a/arch/um/sys-x86_64/kernel-offsets.c b/arch/um/sys-x86_64/kernel-offsets.c
index 998541eade41..bfcb104b846e 100644
--- a/arch/um/sys-x86_64/kernel-offsets.c
+++ b/arch/um/sys-x86_64/kernel-offsets.c
@@ -19,7 +19,7 @@
 void foo(void)
 {
 #ifdef CONFIG_MODE_TT
-        OFFSET(TASK_EXTERN_PID, task_struct, thread.mode.tt.extern_pid);
+        OFFSET(HOST_TASK_EXTERN_PID, task_struct, thread.mode.tt.extern_pid);
 #endif
 #include <common-offsets.h>
 }
diff --git a/arch/um/sys-x86_64/user-offsets.c b/arch/um/sys-x86_64/user-offsets.c
index 513d17ceafd4..5a585bfbb8c2 100644
--- a/arch/um/sys-x86_64/user-offsets.c
+++ b/arch/um/sys-x86_64/user-offsets.c
@@ -16,71 +16,76 @@ typedef __u32 u32;
 #define DEFINE(sym, val) \
         asm volatile("\n->" #sym " %0 " #val : : "i" (val))
 
+#define DEFINE_LONGS(sym, val) \
+        asm volatile("\n->" #sym " %0 " #val : : "i" (val/sizeof(unsigned long)))
+
 #define OFFSET(sym, str, mem) \
         DEFINE(sym, offsetof(struct str, mem));
 
 void foo(void)
 {
-        OFFSET(SC_RBX, sigcontext, rbx);
-        OFFSET(SC_RCX, sigcontext, rcx);
-        OFFSET(SC_RDX, sigcontext, rdx);
-        OFFSET(SC_RSI, sigcontext, rsi);
-        OFFSET(SC_RDI, sigcontext, rdi);
-        OFFSET(SC_RBP, sigcontext, rbp);
-        OFFSET(SC_RAX, sigcontext, rax);
-        OFFSET(SC_R8, sigcontext, r8);
-        OFFSET(SC_R9, sigcontext, r9);
-        OFFSET(SC_R10, sigcontext, r10);
-        OFFSET(SC_R11, sigcontext, r11);
-        OFFSET(SC_R12, sigcontext, r12);
-        OFFSET(SC_R13, sigcontext, r13);
-        OFFSET(SC_R14, sigcontext, r14);
-        OFFSET(SC_R15, sigcontext, r15);
-        OFFSET(SC_IP, sigcontext, rip);
-        OFFSET(SC_SP, sigcontext, rsp);
-        OFFSET(SC_CR2, sigcontext, cr2);
-        OFFSET(SC_ERR, sigcontext, err);
-        OFFSET(SC_TRAPNO, sigcontext, trapno);
-        OFFSET(SC_CS, sigcontext, cs);
-        OFFSET(SC_FS, sigcontext, fs);
-        OFFSET(SC_GS, sigcontext, gs);
-        OFFSET(SC_EFLAGS, sigcontext, eflags);
-        OFFSET(SC_SIGMASK, sigcontext, oldmask);
+        OFFSET(HOST_SC_RBX, sigcontext, rbx);
+        OFFSET(HOST_SC_RCX, sigcontext, rcx);
+        OFFSET(HOST_SC_RDX, sigcontext, rdx);
+        OFFSET(HOST_SC_RSI, sigcontext, rsi);
+        OFFSET(HOST_SC_RDI, sigcontext, rdi);
+        OFFSET(HOST_SC_RBP, sigcontext, rbp);
+        OFFSET(HOST_SC_RAX, sigcontext, rax);
+        OFFSET(HOST_SC_R8, sigcontext, r8);
+        OFFSET(HOST_SC_R9, sigcontext, r9);
+        OFFSET(HOST_SC_R10, sigcontext, r10);
+        OFFSET(HOST_SC_R11, sigcontext, r11);
+        OFFSET(HOST_SC_R12, sigcontext, r12);
+        OFFSET(HOST_SC_R13, sigcontext, r13);
+        OFFSET(HOST_SC_R14, sigcontext, r14);
+        OFFSET(HOST_SC_R15, sigcontext, r15);
+        OFFSET(HOST_SC_IP, sigcontext, rip);
+        OFFSET(HOST_SC_SP, sigcontext, rsp);
+        OFFSET(HOST_SC_CR2, sigcontext, cr2);
+        OFFSET(HOST_SC_ERR, sigcontext, err);
+        OFFSET(HOST_SC_TRAPNO, sigcontext, trapno);
+        OFFSET(HOST_SC_CS, sigcontext, cs);
+        OFFSET(HOST_SC_FS, sigcontext, fs);
+        OFFSET(HOST_SC_GS, sigcontext, gs);
+        OFFSET(HOST_SC_EFLAGS, sigcontext, eflags);
+        OFFSET(HOST_SC_SIGMASK, sigcontext, oldmask);
 #if 0
-        OFFSET(SC_ORIG_RAX, sigcontext, orig_rax);
-        OFFSET(SC_DS, sigcontext, ds);
-        OFFSET(SC_ES, sigcontext, es);
-        OFFSET(SC_SS, sigcontext, ss);
+        OFFSET(HOST_SC_ORIG_RAX, sigcontext, orig_rax);
+        OFFSET(HOST_SC_DS, sigcontext, ds);
+        OFFSET(HOST_SC_ES, sigcontext, es);
+        OFFSET(HOST_SC_SS, sigcontext, ss);
 #endif
 
-        DEFINE(HOST_FRAME_SIZE, FRAME_SIZE);
-        DEFINE(HOST_RBX, RBX);
-        DEFINE(HOST_RCX, RCX);
-        DEFINE(HOST_RDI, RDI);
-        DEFINE(HOST_RSI, RSI);
-        DEFINE(HOST_RDX, RDX);
-        DEFINE(HOST_RBP, RBP);
-        DEFINE(HOST_RAX, RAX);
-        DEFINE(HOST_R8, R8);
-        DEFINE(HOST_R9, R9);
-        DEFINE(HOST_R10, R10);
-        DEFINE(HOST_R11, R11);
-        DEFINE(HOST_R12, R12);
-        DEFINE(HOST_R13, R13);
-        DEFINE(HOST_R14, R14);
-        DEFINE(HOST_R15, R15);
-        DEFINE(HOST_ORIG_RAX, ORIG_RAX);
-        DEFINE(HOST_CS, CS);
-        DEFINE(HOST_SS, SS);
-        DEFINE(HOST_EFLAGS, EFLAGS);
+        DEFINE_LONGS(HOST_FRAME_SIZE, FRAME_SIZE);
+        DEFINE(HOST_FP_SIZE, 0);
+        DEFINE(HOST_XFP_SIZE, 0);
+        DEFINE_LONGS(HOST_RBX, RBX);
+        DEFINE_LONGS(HOST_RCX, RCX);
+        DEFINE_LONGS(HOST_RDI, RDI);
+        DEFINE_LONGS(HOST_RSI, RSI);
+        DEFINE_LONGS(HOST_RDX, RDX);
+        DEFINE_LONGS(HOST_RBP, RBP);
+        DEFINE_LONGS(HOST_RAX, RAX);
+        DEFINE_LONGS(HOST_R8, R8);
+        DEFINE_LONGS(HOST_R9, R9);
+        DEFINE_LONGS(HOST_R10, R10);
+        DEFINE_LONGS(HOST_R11, R11);
+        DEFINE_LONGS(HOST_R12, R12);
+        DEFINE_LONGS(HOST_R13, R13);
+        DEFINE_LONGS(HOST_R14, R14);
+        DEFINE_LONGS(HOST_R15, R15);
+        DEFINE_LONGS(HOST_ORIG_RAX, ORIG_RAX);
+        DEFINE_LONGS(HOST_CS, CS);
+        DEFINE_LONGS(HOST_SS, SS);
+        DEFINE_LONGS(HOST_EFLAGS, EFLAGS);
 #if 0
-        DEFINE(HOST_FS, FS);
-        DEFINE(HOST_GS, GS);
-        DEFINE(HOST_DS, DS);
-        DEFINE(HOST_ES, ES);
+        DEFINE_LONGS(HOST_FS, FS);
+        DEFINE_LONGS(HOST_GS, GS);
+        DEFINE_LONGS(HOST_DS, DS);
+        DEFINE_LONGS(HOST_ES, ES);
 #endif
 
-        DEFINE(HOST_IP, RIP);
-        DEFINE(HOST_SP, RSP);
-        DEFINE(__UM_FRAME_SIZE, sizeof(struct user_regs_struct));
+        DEFINE_LONGS(HOST_IP, RIP);
+        DEFINE_LONGS(HOST_SP, RSP);
+        DEFINE(UM_FRAME_SIZE, sizeof(struct user_regs_struct));
 }
diff --git a/arch/um/sys-x86_64/util/Makefile b/arch/um/sys-x86_64/util/Makefile
deleted file mode 100644
index 75b052cfc206..000000000000
--- a/arch/um/sys-x86_64/util/Makefile
+++ /dev/null
@@ -1,8 +0,0 @@
-# Copyright 2003 - 2004 Pathscale, Inc
-# Released under the GPL
-
-hostprogs-y     := mk_sc mk_thread
-always          := $(hostprogs-y)
-
-HOSTCFLAGS_mk_sc.o := -I$(objtree)/arch/um
-HOSTCFLAGS_mk_thread.o := -I$(objtree)/arch/um
diff --git a/arch/um/sys-x86_64/util/mk_sc.c b/arch/um/sys-x86_64/util/mk_sc.c
deleted file mode 100644
index 7619bc377c1f..000000000000
--- a/arch/um/sys-x86_64/util/mk_sc.c
+++ /dev/null
@@ -1,47 +0,0 @@
-/* Copyright (C) 2003 - 2004 PathScale, Inc
- * Released under the GPL
- */
-
-#include <stdio.h>
-#include <user-offsets.h>
-
-#define SC_OFFSET(name) \
-  printf("#define " #name \
-         "(sc) *((unsigned long *) &(((char *) (sc))[%d]))\n",\
-         name)
-
-int main(int argc, char **argv)
-{
-  SC_OFFSET(SC_RBX);
-  SC_OFFSET(SC_RCX);
-  SC_OFFSET(SC_RDX);
-  SC_OFFSET(SC_RSI);
-  SC_OFFSET(SC_RDI);
-  SC_OFFSET(SC_RBP);
-  SC_OFFSET(SC_RAX);
-  SC_OFFSET(SC_R8);
-  SC_OFFSET(SC_R9);
-  SC_OFFSET(SC_R10);
-  SC_OFFSET(SC_R11);
-  SC_OFFSET(SC_R12);
-  SC_OFFSET(SC_R13);
-  SC_OFFSET(SC_R14);
-  SC_OFFSET(SC_R15);
-  SC_OFFSET(SC_IP);
-  SC_OFFSET(SC_SP);
-  SC_OFFSET(SC_CR2);
-  SC_OFFSET(SC_ERR);
-  SC_OFFSET(SC_TRAPNO);
-  SC_OFFSET(SC_CS);
-  SC_OFFSET(SC_FS);
-  SC_OFFSET(SC_GS);
-  SC_OFFSET(SC_EFLAGS);
-  SC_OFFSET(SC_SIGMASK);
-#if 0
-  SC_OFFSET(SC_ORIG_RAX);
-  SC_OFFSET(SC_DS);
-  SC_OFFSET(SC_ES);
-  SC_OFFSET(SC_SS);
-#endif
-  return(0);
-}
diff --git a/arch/um/sys-x86_64/util/mk_thread.c b/arch/um/sys-x86_64/util/mk_thread.c
deleted file mode 100644
index 15517396e9cf..000000000000
--- a/arch/um/sys-x86_64/util/mk_thread.c
+++ /dev/null
@@ -1,20 +0,0 @@
-#include <stdio.h>
-#include <kernel-offsets.h>
-
-int main(int argc, char **argv)
-{
-  printf("/*\n");
-  printf(" * Generated by mk_thread\n");
-  printf(" */\n");
-  printf("\n");
-  printf("#ifndef __UM_THREAD_H\n");
-  printf("#define __UM_THREAD_H\n");
-  printf("\n");
-#ifdef TASK_EXTERN_PID
-  printf("#define TASK_EXTERN_PID(task) *((int *) &(((char *) (task))[%d]))\n",
-         TASK_EXTERN_PID);
-#endif
-  printf("\n");
-  printf("#endif\n");
-  return(0);
-}
diff --git a/arch/um/util/Makefile b/arch/um/util/Makefile
deleted file mode 100644
index 4c7551c28033..000000000000
--- a/arch/um/util/Makefile
+++ /dev/null
@@ -1,5 +0,0 @@
-hostprogs-y             := mk_task mk_constants
-always                  := $(hostprogs-y)
-
-HOSTCFLAGS_mk_task.o := -I$(objtree)/arch/um
-HOSTCFLAGS_mk_constants.o := -I$(objtree)/arch/um
diff --git a/arch/um/util/mk_constants.c b/arch/um/util/mk_constants.c
deleted file mode 100644
index ab217becc36a..000000000000
--- a/arch/um/util/mk_constants.c
+++ /dev/null
@@ -1,32 +0,0 @@
-#include <stdio.h>
-#include <kernel-offsets.h>
-
-#define SHOW_INT(sym) printf("#define %s %d\n", #sym, sym)
-#define SHOW_STR(sym) printf("#define %s %s\n", #sym, sym)
-
-int main(int argc, char **argv)
-{
-  printf("/*\n");
-  printf(" * Generated by mk_constants\n");
-  printf(" */\n");
-  printf("\n");
-  printf("#ifndef __UM_CONSTANTS_H\n");
-  printf("#define __UM_CONSTANTS_H\n");
-  printf("\n");
-
-  SHOW_INT(UM_KERN_PAGE_SIZE);
-
-  SHOW_STR(UM_KERN_EMERG);
-  SHOW_STR(UM_KERN_ALERT);
-  SHOW_STR(UM_KERN_CRIT);
-  SHOW_STR(UM_KERN_ERR);
-  SHOW_STR(UM_KERN_WARNING);
-  SHOW_STR(UM_KERN_NOTICE);
-  SHOW_STR(UM_KERN_INFO);
-  SHOW_STR(UM_KERN_DEBUG);
-
-  SHOW_INT(UM_NSEC_PER_SEC);
-  printf("\n");
-  printf("#endif\n");
-  return(0);
-}
diff --git a/arch/um/util/mk_task.c b/arch/um/util/mk_task.c
deleted file mode 100644
index 36c9606505e2..000000000000
--- a/arch/um/util/mk_task.c
+++ /dev/null
@@ -1,30 +0,0 @@
-#include <stdio.h>
-#include <kernel-offsets.h>
-
-void print_ptr(char *name, char *type, int offset)
-{
-  printf("#define %s(task) ((%s *) &(((char *) (task))[%d]))\n", name, type,
-         offset);
-}
-
-void print(char *name, char *type, int offset)
-{
-  printf("#define %s(task) *((%s *) &(((char *) (task))[%d]))\n", name, type,
-         offset);
-}
-
-int main(int argc, char **argv)
-{
-  printf("/*\n");
-  printf(" * Generated by mk_task\n");
-  printf(" */\n");
-  printf("\n");
-  printf("#ifndef __TASK_H\n");
-  printf("#define __TASK_H\n");
-  printf("\n");
-  print_ptr("TASK_REGS", "union uml_pt_regs", TASK_REGS);
-  print("TASK_PID", "int", TASK_PID);
-  printf("\n");
-  printf("#endif\n");
-  return(0);
-}