20 files changed, 73 insertions, 114 deletions

diff --git a/arch/um/Makefile b/arch/um/Makefile
index b15f6048caae..154803a22698 100644
--- a/arch/um/Makefile
+++ b/arch/um/Makefile
@@ -103,7 +103,6 @@ endef
 
 ifneq ($(KBUILD_SRC),)
 $(shell mkdir -p $(ARCH_DIR) && ln -fsn $(srctree)/$(ARCH_DIR)/Kconfig.$(SUBARCH) $(ARCH_DIR)/Kconfig.arch)
-CLEAN_FILES += $(ARCH_DIR)/Kconfig.arch
 else
 $(shell cd $(ARCH_DIR) && ln -sf Kconfig.$(SUBARCH) Kconfig.arch)
 endif
@@ -144,14 +143,14 @@ endef
 #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)/include/user_constants.h $(ARCH_DIR)/Kconfig.arch
 
 MRPROPER_FILES += $(SYMLINK_HEADERS) $(ARCH_SYMLINKS) \
-        $(addprefix $(ARCH_DIR)/kernel/,$(KERN_SYMLINKS)) $(ARCH_DIR)/os \
-        $(ARCH_DIR)/Kconfig.arch
+        $(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
 
@@ -197,6 +196,22 @@ define filechk_umlconfig
         sed 's/ CONFIG/ UML_CONFIG/'
 endef
 
+define filechk_gen-asm-offsets
+        (set -e; \
+         echo "#ifndef __ASM_OFFSETS_H__"; \
+         echo "#define __ASM_OFFSETS_H__"; \
+         echo "/*"; \
+         echo " * DO NOT MODIFY."; \
+         echo " *"; \
+         echo " * This file was generated by arch/$(ARCH)/Makefile"; \
+         echo " *"; \
+         echo " */"; \
+         echo ""; \
+         sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \
+         echo ""; \
+         echo "#endif" )
+endef
+
 $(ARCH_DIR)/include/uml-config.h : include/linux/autoconf.h
         $(call filechk,umlconfig)
 
diff --git a/arch/um/Makefile-i386 b/arch/um/Makefile-i386
index a777e57dbf89..1ab431a53ac3 100644
--- a/arch/um/Makefile-i386
+++ b/arch/um/Makefile-i386
@@ -27,7 +27,7 @@ export LDFLAGS HOSTCFLAGS HOSTLDFLAGS UML_OBJCOPYFLAGS
 endif
 endif
 
-CFLAGS += -U__$(SUBARCH)__ -U$(SUBARCH) $(STUB_CFLAGS)
+CFLAGS += -U__$(SUBARCH)__ -U$(SUBARCH)
 
 ifneq ($(CONFIG_GPROF),y)
 ARCH_CFLAGS += -DUM_FASTCALL
diff --git a/arch/um/Makefile-x86_64 b/arch/um/Makefile-x86_64
index baddb5d64ca5..436abbba409b 100644
--- a/arch/um/Makefile-x86_64
+++ b/arch/um/Makefile-x86_64
@@ -8,6 +8,7 @@ START := 0x60000000
 #it's needed for headers to work!
 CFLAGS += -U__$(SUBARCH)__ -fno-builtin
 USER_CFLAGS += -fno-builtin
+CHECKFLAGS  += -m64
 
 ELF_ARCH := i386:x86-64
 ELF_FORMAT := elf64-x86-64
diff --git a/arch/um/include/common-offsets.h b/arch/um/include/common-offsets.h
index d705daa2d854..0aa620970adb 100644
--- a/arch/um/include/common-offsets.h
+++ b/arch/um/include/common-offsets.h
@@ -12,3 +12,4 @@ DEFINE_STR(UM_KERN_WARNING, KERN_WARNING);
 DEFINE_STR(UM_KERN_NOTICE, KERN_NOTICE);
 DEFINE_STR(UM_KERN_INFO, KERN_INFO);
 DEFINE_STR(UM_KERN_DEBUG, KERN_DEBUG);
+DEFINE(HOST_ELF_CLASS, ELF_CLASS);
diff --git a/arch/um/include/mem.h b/arch/um/include/mem.h
index 99d3ad4a03e5..e8ff0d8fa610 100644
--- a/arch/um/include/mem.h
+++ b/arch/um/include/mem.h
@@ -13,7 +13,17 @@ extern int physmem_subst_mapping(void *virt, int fd, __u64 offset, int w);
 extern int is_remapped(void *virt);
 extern int physmem_remove_mapping(void *virt);
 extern void physmem_forget_descriptor(int fd);
-extern unsigned long to_phys(void *virt);
+
+extern unsigned long uml_physmem;
+static inline unsigned long to_phys(void *virt)
+{
+        return(((unsigned long) virt) - uml_physmem);
+}
+
+static inline void *to_virt(unsigned long phys)
+{
+        return((void *) uml_physmem + phys);
+}
 
 #endif
 
diff --git a/arch/um/include/um_uaccess.h b/arch/um/include/um_uaccess.h
index 6e348cb6de24..84c0868cd561 100644
--- a/arch/um/include/um_uaccess.h
+++ b/arch/um/include/um_uaccess.h
@@ -20,13 +20,6 @@
 #define access_ok(type, addr, size) \
         CHOOSE_MODE_PROC(access_ok_tt, access_ok_skas, type, addr, size)
 
-/* this function will go away soon - use access_ok() instead */
-static inline int __deprecated verify_area(int type, const void __user *addr, unsigned long size)
-{
-        return (CHOOSE_MODE_PROC(verify_area_tt, verify_area_skas, type, addr,
-                                size));
-}
-
 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,
diff --git a/arch/um/kernel/asm-offsets.c b/arch/um/kernel/asm-offsets.c
new file mode 100644
index 000000000000..c13a64a288f6
--- /dev/null
+++ b/arch/um/kernel/asm-offsets.c
@@ -0,0 +1 @@
+/* Dummy file to make kbuild happy - unused! */
diff --git a/arch/um/kernel/dyn.lds.S b/arch/um/kernel/dyn.lds.S
index 3942a5f245de..2517ecb8bf27 100644
--- a/arch/um/kernel/dyn.lds.S
+++ b/arch/um/kernel/dyn.lds.S
@@ -146,37 +146,8 @@ SECTIONS
   }
   _end = .;
   PROVIDE (end = .);
-   /* Stabs debugging sections.  */
-  .stab          0 : { *(.stab) }
-  .stabstr       0 : { *(.stabstr) }
-  .stab.excl     0 : { *(.stab.excl) }
-  .stab.exclstr  0 : { *(.stab.exclstr) }
-  .stab.index    0 : { *(.stab.index) }
-  .stab.indexstr 0 : { *(.stab.indexstr) }
-  .comment       0 : { *(.comment) }
-  /* DWARF debug sections.
-     Symbols in the DWARF debugging sections are relative to the beginning
-     of the section so we begin them at 0.  */
-  /* DWARF 1 */
-  .debug          0 : { *(.debug) }
-  .line           0 : { *(.line) }
-  /* GNU DWARF 1 extensions */
-  .debug_srcinfo  0 : { *(.debug_srcinfo) }
-  .debug_sfnames  0 : { *(.debug_sfnames) }
-  /* DWARF 1.1 and DWARF 2 */
-  .debug_aranges  0 : { *(.debug_aranges) }
-  .debug_pubnames 0 : { *(.debug_pubnames) }
-  /* DWARF 2 */
-  .debug_info     0 : { *(.debug_info .gnu.linkonce.wi.*) }
-  .debug_abbrev   0 : { *(.debug_abbrev) }
-  .debug_line     0 : { *(.debug_line) }
-  .debug_frame    0 : { *(.debug_frame) }
-  .debug_str      0 : { *(.debug_str) }
-  .debug_loc      0 : { *(.debug_loc) }
-  .debug_macinfo  0 : { *(.debug_macinfo) }
-  /* SGI/MIPS DWARF 2 extensions */
-  .debug_weaknames 0 : { *(.debug_weaknames) }
-  .debug_funcnames 0 : { *(.debug_funcnames) }
-  .debug_typenames 0 : { *(.debug_typenames) }
-  .debug_varnames  0 : { *(.debug_varnames) }
+
+  STABS_DEBUG
+
+  DWARF_DEBUG
 }
diff --git a/arch/um/kernel/ksyms.c b/arch/um/kernel/ksyms.c
index 32d3076dd220..a97a72e516aa 100644
--- a/arch/um/kernel/ksyms.c
+++ b/arch/um/kernel/ksyms.c
@@ -34,14 +34,9 @@ EXPORT_SYMBOL(host_task_size);
 EXPORT_SYMBOL(arch_validate);
 EXPORT_SYMBOL(get_kmem_end);
 
-EXPORT_SYMBOL(page_to_phys);
-EXPORT_SYMBOL(phys_to_page);
 EXPORT_SYMBOL(high_physmem);
 EXPORT_SYMBOL(empty_zero_page);
 EXPORT_SYMBOL(um_virt_to_phys);
-EXPORT_SYMBOL(__virt_to_page);
-EXPORT_SYMBOL(to_phys);
-EXPORT_SYMBOL(to_virt);
 EXPORT_SYMBOL(mode_tt);
 EXPORT_SYMBOL(handle_page_fault);
 EXPORT_SYMBOL(find_iomem);
diff --git a/arch/um/kernel/mem.c b/arch/um/kernel/mem.c
index 5597bd39e6b5..64fa062cc119 100644
--- a/arch/um/kernel/mem.c
+++ b/arch/um/kernel/mem.c
@@ -196,7 +196,7 @@ static void init_highmem(void)
 
 static void __init fixaddr_user_init( void)
 {
-#if CONFIG_ARCH_REUSE_HOST_VSYSCALL_AREA
+#ifdef CONFIG_ARCH_REUSE_HOST_VSYSCALL_AREA
         long size = FIXADDR_USER_END - FIXADDR_USER_START;
         pgd_t *pgd;
         pud_t *pud;
diff --git a/arch/um/kernel/physmem.c b/arch/um/kernel/physmem.c
index a24e3b7f4bf0..ea670fcc8af5 100644
--- a/arch/um/kernel/physmem.c
+++ b/arch/um/kernel/physmem.c
@@ -248,16 +248,6 @@ unsigned long high_physmem;
 
 extern unsigned long physmem_size;
 
-void *to_virt(unsigned long phys)
-{
-        return((void *) uml_physmem + phys);
-}
-
-unsigned long to_phys(void *virt)
-{
-        return(((unsigned long) virt) - uml_physmem);
-}
-
 int init_maps(unsigned long physmem, unsigned long iomem, unsigned long highmem)
 {
         struct page *p, *map;
@@ -298,31 +288,6 @@ int init_maps(unsigned long physmem, unsigned long iomem, unsigned long highmem)
         return(0);
 }
 
-struct page *phys_to_page(const unsigned long phys)
-{
-        return(&mem_map[phys >> PAGE_SHIFT]);
-}
-
-struct page *__virt_to_page(const unsigned long virt)
-{
-        return(&mem_map[__pa(virt) >> PAGE_SHIFT]);
-}
-
-phys_t page_to_phys(struct page *page)
-{
-        return((page - mem_map) << PAGE_SHIFT);
-}
-
-pte_t mk_pte(struct page *page, pgprot_t pgprot)
-{
-        pte_t pte;
-
-        pte_set_val(pte, page_to_phys(page), pgprot);
-        if(pte_present(pte))
-                pte_mknewprot(pte_mknewpage(pte));
-        return(pte);
-}
-
 /* Changed during early boot */
 static unsigned long kmem_top = 0;
 
diff --git a/arch/um/kernel/skas/include/uaccess-skas.h b/arch/um/kernel/skas/include/uaccess-skas.h
index cd6c280482cb..6ee3f3902e68 100644
--- a/arch/um/kernel/skas/include/uaccess-skas.h
+++ b/arch/um/kernel/skas/include/uaccess-skas.h
@@ -18,18 +18,18 @@
           ((unsigned long) (addr) + (size) <= FIXADDR_USER_END) && \
           ((unsigned long) (addr) + (size) >= (unsigned long)(addr))))
 
-static inline int verify_area_skas(int type, const void * addr,
+static inline int verify_area_skas(int type, const void __user * addr,
                                    unsigned long size)
 {
         return(access_ok_skas(type, addr, size) ? 0 : -EFAULT);
 }
 
-extern int copy_from_user_skas(void *to, const void *from, int n);
-extern int copy_to_user_skas(void *to, const void *from, int n);
-extern int strncpy_from_user_skas(char *dst, const char *src, int count);
-extern int __clear_user_skas(void *mem, int len);
-extern int clear_user_skas(void *mem, int len);
-extern int strnlen_user_skas(const void *str, int len);
+extern int copy_from_user_skas(void *to, const void __user *from, int n);
+extern int copy_to_user_skas(void __user *to, const void *from, int n);
+extern int strncpy_from_user_skas(char *dst, const char __user *src, int count);
+extern int __clear_user_skas(void __user *mem, int len);
+extern int clear_user_skas(void __user *mem, int len);
+extern int strnlen_user_skas(const void __user *str, int len);
 
 #endif
 
diff --git a/arch/um/kernel/trap_kern.c b/arch/um/kernel/trap_kern.c
index b5fc89fe9eab..87cc6fd76ced 100644
--- a/arch/um/kernel/trap_kern.c
+++ b/arch/um/kernel/trap_kern.c
@@ -57,7 +57,8 @@ good_area:
         if(is_write && !(vma->vm_flags & VM_WRITE)) 
                 goto out;
 
-        if(!(vma->vm_flags & (VM_READ | VM_EXEC)))
+        /* Don't require VM_READ|VM_EXEC for write faults! */
+        if(!is_write && !(vma->vm_flags & (VM_READ | VM_EXEC)))
                 goto out;
 
         do {
@@ -84,8 +85,7 @@ survive:
                 pte = pte_offset_kernel(pmd, address);
         } while(!pte_present(*pte));
         err = 0;
-        *pte = pte_mkyoung(*pte);
-        if(pte_write(*pte)) *pte = pte_mkdirty(*pte);
+        WARN_ON(!pte_young(*pte) || (is_write && !pte_dirty(*pte)));
         flush_tlb_page(vma, address);
 out:
         up_read(&mm->mmap_sem);
diff --git a/arch/um/kernel/tt/include/uaccess-tt.h b/arch/um/kernel/tt/include/uaccess-tt.h
index 3fbb5fe26f49..aa6db384af80 100644
--- a/arch/um/kernel/tt/include/uaccess-tt.h
+++ b/arch/um/kernel/tt/include/uaccess-tt.h
@@ -33,7 +33,7 @@ extern unsigned long uml_physmem;
          (((unsigned long) (addr) <= ((unsigned long) (addr) + (size))) && \
           (under_task_size(addr, size) || is_stack(addr, size))))
 
-static inline int verify_area_tt(int type, const void * addr,
+static inline int verify_area_tt(int type, const void __user * addr,
                                  unsigned long size)
 {
         return(access_ok_tt(type, addr, size) ? 0 : -EFAULT);
@@ -50,12 +50,12 @@ extern int __do_clear_user(void *mem, size_t len, void **fault_addr,
 extern int __do_strnlen_user(const char *str, unsigned long n,
                              void **fault_addr, void **fault_catcher);
 
-extern int copy_from_user_tt(void *to, const void *from, int n);
-extern int copy_to_user_tt(void *to, const void *from, int n);
-extern int strncpy_from_user_tt(char *dst, const char *src, int count);
-extern int __clear_user_tt(void *mem, int len);
-extern int clear_user_tt(void *mem, int len);
-extern int strnlen_user_tt(const void *str, int len);
+extern int copy_from_user_tt(void *to, const void __user *from, int n);
+extern int copy_to_user_tt(void __user *to, const void *from, int n);
+extern int strncpy_from_user_tt(char *dst, const char __user *src, int count);
+extern int __clear_user_tt(void __user *mem, int len);
+extern int clear_user_tt(void __user *mem, int len);
+extern int strnlen_user_tt(const void __user *str, int len);
 
 #endif
 
diff --git a/arch/um/kernel/uml.lds.S b/arch/um/kernel/uml.lds.S
index b03326d391c9..af11915ce0a8 100644
--- a/arch/um/kernel/uml.lds.S
+++ b/arch/um/kernel/uml.lds.S
@@ -93,14 +93,10 @@ SECTIONS
    *(.bss)
    *(COMMON)
   }
-  _end = . ;
+  _end = .;
   PROVIDE (end = .);
-  /* Stabs debugging sections.  */
-  .stab 0 : { *(.stab) }
-  .stabstr 0 : { *(.stabstr) }
-  .stab.excl 0 : { *(.stab.excl) }
-  .stab.exclstr 0 : { *(.stab.exclstr) }
-  .stab.index 0 : { *(.stab.index) }
-  .stab.indexstr 0 : { *(.stab.indexstr) }
-  .comment 0 : { *(.comment) }
+
+  STABS_DEBUG
+
+  DWARF_DEBUG
 }
diff --git a/arch/um/os-Linux/Makefile b/arch/um/os-Linux/Makefile
index d3c1560e3ed8..7a1662419c0c 100644
--- a/arch/um/os-Linux/Makefile
+++ b/arch/um/os-Linux/Makefile
@@ -9,6 +9,9 @@ obj-y = aio.o elf_aux.o file.o process.o signal.o start_up.o time.o tt.o \
 USER_OBJS := aio.o elf_aux.o file.o process.o signal.o start_up.o time.o tt.o \
         tty.o
 
+elf_aux.o: $(ARCH_DIR)/kernel-offsets.h
+CFLAGS_elf_aux.o += -I$(objtree)/arch/um
+
 CFLAGS_user_syms.o += -DSUBARCH_$(SUBARCH)
 
 HAVE_AIO_ABI := $(shell [ -r /usr/include/linux/aio_abi.h ] && \
diff --git a/arch/um/os-Linux/elf_aux.c b/arch/um/os-Linux/elf_aux.c
index 4cca3e9c23fe..1399520a8588 100644
--- a/arch/um/os-Linux/elf_aux.c
+++ b/arch/um/os-Linux/elf_aux.c
@@ -12,8 +12,9 @@
 #include "init.h"
 #include "elf_user.h"
 #include "mem_user.h"
+#include <kernel-offsets.h>
 
-#if ELF_CLASS == ELFCLASS32
+#if HOST_ELF_CLASS == ELFCLASS32
 typedef Elf32_auxv_t elf_auxv_t;
 #else
 typedef Elf64_auxv_t elf_auxv_t;
diff --git a/arch/um/scripts/Makefile.rules b/arch/um/scripts/Makefile.rules
index 17f305b6bade..59a1291f477e 100644
--- a/arch/um/scripts/Makefile.rules
+++ b/arch/um/scripts/Makefile.rules
@@ -9,6 +9,11 @@ USER_OBJS := $(foreach file,$(USER_OBJS),$(obj)/$(file))
 
 $(USER_OBJS) : c_flags = -Wp,-MD,$(depfile) $(USER_CFLAGS) \
         $(CFLAGS_$(notdir $@))
+$(USER_OBJS): cmd_checksrc =
+$(USER_OBJS): quiet_cmd_checksrc =
+$(USER_OBJS): cmd_force_checksrc =
+$(USER_OBJS): quiet_cmd_force_checksrc =
+
 
 # The stubs and unmap.o can't try to call mcount or update basic block data
 define unprofile
diff --git a/arch/um/sys-i386/kernel-offsets.c b/arch/um/sys-i386/kernel-offsets.c
index 9f8ecd1fdd96..a1070af2bcd8 100644
--- a/arch/um/sys-i386/kernel-offsets.c
+++ b/arch/um/sys-i386/kernel-offsets.c
@@ -2,6 +2,7 @@
 #include <linux/stddef.h>
 #include <linux/sched.h>
 #include <linux/time.h>
+#include <linux/elf.h>
 #include <asm/page.h>
 
 #define DEFINE(sym, val) \
diff --git a/arch/um/sys-x86_64/kernel-offsets.c b/arch/um/sys-x86_64/kernel-offsets.c
index 220e875cbe29..998541eade41 100644
--- a/arch/um/sys-x86_64/kernel-offsets.c
+++ b/arch/um/sys-x86_64/kernel-offsets.c
@@ -2,6 +2,7 @@
 #include <linux/stddef.h>
 #include <linux/sched.h>
 #include <linux/time.h>
+#include <linux/elf.h>
 #include <asm/page.h>
 
 #define DEFINE(sym, val) \