Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-next

* git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-next: (25 commits)
  allow stripping of generated symbols under CONFIG_KALLSYMS_ALL
  kbuild: strip generated symbols from *.ko
  kbuild: simplify use of genksyms
  kernel-doc: check for extra kernel-doc notations
  kbuild: add headerdep used to detect inclusion cycles in header files
  kbuild: fix string equality testing in tags.sh
  kbuild: fix make tags/cscope
  kbuild: fix make incompatibility
  kbuild: remove TAR_IGNORE
  setlocalversion: add git-svn support
  setlocalversion: print correct subversion revision
  scripts: improve the decodecode script
  scripts/package: allow custom options to rpm
  genksyms: allow to ignore symbol checksum changes
  genksyms: track symbol checksum changes
  tags and cscope support really belongs in a shell script
  kconfig: fix options to check-lxdialog.sh
  kbuild: gen_init_cpio expands shell variables in file names
  remove bashisms from scripts/extract-ikconfig
  kbuild: teach mkmakfile to be silent
  ...

21 files changed, 923 insertions, 197 deletions

diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include
index 982dcae7bbe2..c29be8f90248 100644
--- a/scripts/Kbuild.include
+++ b/scripts/Kbuild.include
@@ -25,6 +25,13 @@ basetarget = $(basename $(notdir $@))
 escsq = $(subst $(squote),'\$(squote)',$1)
 
 ###
+# Easy method for doing a status message
+       kecho := :
+ quiet_kecho := echo
+silent_kecho := :
+kecho := $($(quiet)kecho)
+
+###
 # filechk is used to check if the content of a generated file is updated.
 # Sample usage:
 # define filechk_sample
@@ -39,22 +46,15 @@ escsq = $(subst $(squote),'\$(squote)',$1)
 # - If they are equal no change, and no timestamp update
 # - stdin is piped in from the first prerequisite ($<) so one has
 #   to specify a valid file as first prerequisite (often the kbuild file)
-       chk_filechk = :
- quiet_chk_filechk = echo '  CHK     $@'
-silent_chk_filechk = :
-       upd_filechk = :
- quiet_upd_filechk = echo '  UPD     $@'
-silent_upd_filechk = :
-
 define filechk
         $(Q)set -e;                             \
-        $($(quiet)chk_filechk);                 \
+        $(kecho) '  CHK     $@';                \
         mkdir -p $(dir $@);                     \
         $(filechk_$(1)) < $< > $@.tmp;          \
         if [ -r $@ ] && cmp -s $@ $@.tmp; then  \
                 rm -f $@.tmp;                   \
         else                                    \
-                $($(quiet)upd_filechk);         \
+                $(kecho) '  UPD     $@';        \
                 mv -f $@.tmp $@;                \
         fi
 endef
@@ -144,7 +144,9 @@ ld-option = $(call try-run,\
 build := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj
 
 # Prefix -I with $(srctree) if it is not an absolute path.
-addtree = $(if $(filter-out -I/%,$(1)),$(patsubst -I%,-I$(srctree)/%,$(1))) $(1)
+# skip if -I has no parameter
+addtree = $(if $(patsubst -I%,%,$(1)), \
+$(if $(filter-out -I/%,$(1)),$(patsubst -I%,-I$(srctree)/%,$(1))) $(1))
 
 # Find all -I options and call addtree
 flags = $(foreach o,$($(1)),$(if $(filter -I%,$(o)),$(call addtree,$(o)),$(o)))
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index 7a176773af85..5d900307de3e 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -151,14 +151,20 @@ cmd_cc_i_c       = $(CPP) $(c_flags)   -o $@ $<
 $(obj)/%.i: $(src)/%.c FORCE
         $(call if_changed_dep,cc_i_c)
 
+cmd_genksyms =                                                              \
+    $(CPP) -D__GENKSYMS__ $(c_flags) $< |                                   \
+    $(GENKSYMS) -T $@ -A -a $(ARCH)                                         \
+     $(if $(KBUILD_PRESERVE),-p)                                            \
+     $(if $(1),-r $(firstword $(wildcard $(@:.symtypes=.symref) /dev/null)))
+
 quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@
-cmd_cc_symtypes_c          = \
-                $(CPP) -D__GENKSYMS__ $(c_flags) $<                     \
-                | $(GENKSYMS) -T $@ >/dev/null;                         \
-                test -s $@ || rm -f $@
+cmd_cc_symtypes_c =                                                         \
+    set -e;                                                                 \
+    $(call cmd_genksyms, true) >/dev/null;                                  \
+    test -s $@ || rm -f $@
 
 $(obj)/%.symtypes : $(src)/%.c FORCE
-        $(call if_changed_dep,cc_symtypes_c)
+        $(call cmd,cc_symtypes_c)
 
 # C (.c) files
 # The C file is compiled and updated dependency information is generated.
@@ -171,30 +177,38 @@ cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
 
 else
 # When module versioning is enabled the following steps are executed:
-# o compile a .tmp_<file>.o from <file>.c
-# o if .tmp_<file>.o doesn't contain a __ksymtab version, i.e. does
-#   not export symbols, we just rename .tmp_<file>.o to <file>.o and
+# o compile a .tmp_<file>.s from <file>.c
+# o if .tmp_<file>.s doesn't contain a __ksymtab version, i.e. does
+#   not export symbols, we just assemble .tmp_<file>.s to <file>.o and
 #   are done.
 # o otherwise, we calculate symbol versions using the good old
 #   genksyms on the preprocessed source and postprocess them in a way
-#   that they are usable as a linker script
-# o generate <file>.o from .tmp_<file>.o using the linker to
-#   replace the unresolved symbols __crc_exported_symbol with
-#   the actual value of the checksum generated by genksyms
+#   that they are usable as assembly source
+# o assemble <file>.o from .tmp_<file>.s forcing inclusion of directives
+#   defining the actual values of __crc_*, followed by objcopy-ing them
+#   to force these symbols to be local to permit stripping them later.
+s_file = $(@D)/.tmp_$(@F:.o=.s)
+v_file = $(@D)/.tmp_$(@F:.o=.v)
+tmp_o_file = $(@D)/.tmp_$(@F)
+no_g_c_flags = $(filter-out -g%,$(c_flags))
+
+cmd_cc_o_c = $(CC) $(c_flags) -S -o $(s_file) $<
 
-cmd_cc_o_c = $(CC) $(c_flags) -c -o $(@D)/.tmp_$(@F) $<
 cmd_modversions =                                                       \
-        if $(OBJDUMP) -h $(@D)/.tmp_$(@F) | grep -q __ksymtab; then     \
-                $(CPP) -D__GENKSYMS__ $(c_flags) $<                     \
-                | $(GENKSYMS) $(if $(KBUILD_SYMTYPES),                  \
-                              -T $(@D)/$(@F:.o=.symtypes)) -a $(ARCH)   \
-                > $(@D)/.tmp_$(@F:.o=.ver);                             \
-                                                                        \
-                $(LD) $(LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F)              \
-                        -T $(@D)/.tmp_$(@F:.o=.ver);                    \
-                rm -f $(@D)/.tmp_$(@F) $(@D)/.tmp_$(@F:.o=.ver);        \
+        if grep -q __ksymtab $(s_file); then                            \
+                if $(call cmd_genksyms, $(KBUILD_SYMTYPES)) > $(v_file) \
+                   && $(CC) $(no_g_c_flags) -c -Wa,$(v_file)            \
+                            -o $(tmp_o_file) $(s_file)                  \
+                   && $(OBJCOPY) -L '__crc_*' -L '___crc_*' -w          \
+                                 $(tmp_o_file) $@;                      \
+                then                                                    \
+                        : ;                                             \
+                else                                                    \
+                        rm -f $@; exit 1;                               \
+                fi;                                                     \
         else                                                            \
-                mv -f $(@D)/.tmp_$(@F) $@;                              \
+                rm -f $(v_file);                                        \
+                $(CC) $(no_g_c_flags) -c -o $@ $(s_file);               \
         fi;
 endif
 
@@ -211,7 +225,12 @@ define rule_cc_o_c
         $(cmd_record_mcount)                                              \
         scripts/basic/fixdep $(depfile) $@ '$(call make-cmd,cc_o_c)' >    \
                                                       $(dot-target).tmp;  \
-        rm -f $(depfile);                                                 \
+        if [ -r $(@D)/.tmp_$(@F:.o=.v) ]; then                            \
+                echo >> $(dot-target).tmp;                                \
+                echo '$@: $(GENKSYMS)' >> $(dot-target).tmp;              \
+                echo '$(GENKSYMS):: ;' >> $(dot-target).tmp;              \
+        fi;                                                               \
+        rm -f $(depfile) $(@D)/.tmp_$(@F:.o=.?);                          \
         mv -f $(dot-target).tmp $(dot-target).cmd
 endef
 
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index b4ca38a21158..e06365775bdf 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -104,9 +104,11 @@ else
 debug_flags =
 endif
 
-orig_c_flags   = $(KBUILD_CFLAGS) $(ccflags-y) $(CFLAGS_$(basetarget).o)
+orig_c_flags   = $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS)                     \
+                 $(ccflags-y) $(CFLAGS_$(basetarget).o)
 _c_flags       = $(filter-out $(CFLAGS_REMOVE_$(basetarget).o), $(orig_c_flags))
-_a_flags       = $(KBUILD_AFLAGS) $(asflags-y) $(AFLAGS_$(basetarget).o)
+_a_flags       = $(KBUILD_CPPFLAGS) $(KBUILD_AFLAGS)                     \
+                 $(asflags-y) $(AFLAGS_$(basetarget).o)
 _cpp_flags     = $(KBUILD_CPPFLAGS) $(cppflags-y) $(CPPFLAGS_$(@F))
 
 # If building the kernel in a separate objtree expand all occurrences
@@ -127,15 +129,16 @@ __a_flags	=                          $(call flags,_a_flags)
 __cpp_flags     =                          $(call flags,_cpp_flags)
 endif
 
-c_flags        = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(KBUILD_CPPFLAGS) \
-                 $(__c_flags) $(modkern_cflags) \
+c_flags        = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE)     \
+                 $(__c_flags) $(modkern_cflags)                           \
                  -D"KBUILD_STR(s)=\#s" $(basename_flags) $(modname_flags) \
                   $(debug_flags)
 
-a_flags        = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(KBUILD_CPPFLAGS) \
+a_flags        = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE)     \
                  $(__a_flags) $(modkern_aflags)
 
-cpp_flags      = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(__cpp_flags)
+cpp_flags      = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE)     \
+                 $(__cpp_flags)
 
 ld_flags       = $(LDFLAGS) $(ldflags-y)
 
diff --git a/scripts/Makefile.modinst b/scripts/Makefile.modinst
index efa5d940e632..a5122dce1264 100644
--- a/scripts/Makefile.modinst
+++ b/scripts/Makefile.modinst
@@ -17,7 +17,8 @@ __modinst: $(modules)
         @:
 
 quiet_cmd_modules_install = INSTALL $@
-      cmd_modules_install = mkdir -p $(2); cp $@ $(2) ; $(mod_strip_cmd) $(2)/$(notdir $@)
+      cmd_modules_install = mkdir -p $(2); \
+                            $(mod_strip_cmd) $@ $(2)/$(notdir $@) || cp $@ $(2)
 
 # Modules built outside the kernel source tree go into extra by default
 INSTALL_MOD_DIR ?= extra
diff --git a/scripts/decodecode b/scripts/decodecode
index 235d3938529d..4b00647814bc 100755
--- a/scripts/decodecode
+++ b/scripts/decodecode
@@ -7,7 +7,7 @@
 # AFLAGS=--32 decodecode < 386.oops
 
 cleanup() {
-        rm -f $T $T.s $T.o
+        rm -f $T $T.s $T.o $T.oo $T.aa  $T.aaa
         exit 1
 }
 
@@ -44,21 +44,33 @@ if [ $marker -eq 0 ]; then
         marker=`expr index "$code" "\("`
 fi
 
+touch $T.oo
 if [ $marker -ne 0 ]; then
-        beforemark=`echo "$code" | cut -c-$((${marker} - 1))`
+        echo All code >> $T.oo
+        echo ======== >> $T.oo
+        beforemark=`echo "$code"`
         echo -n "       .byte 0x" > $T.s
-        echo $beforemark | sed -e 's/ /,0x/g' >> $T.s
-        as $AFLAGS -o $T.o $T.s
-        objdump -S $T.o
-        rm $T.o $T.s
+        echo $beforemark | sed -e 's/ /,0x/g' | sed -e 's/<//g' | sed -e 's/>//g' >> $T.s
+        as $AFLAGS -o $T.o $T.s &> /dev/null
+        objdump -S $T.o | grep -v "/tmp" | grep -v "Disassembly" | grep -v "\.text" | grep -v "^$" &> $T.ooo
+        cat $T.ooo >> $T.oo
+        rm -f $T.o $T.s  $T.ooo
 
 # and fix code at-and-after marker
         code=`echo "$code" | cut -c$((${marker} + 1))-`
 fi
-
+echo Code starting with the faulting instruction  > $T.aa
+echo =========================================== >> $T.aa
 code=`echo $code | sed -e 's/ [<(]/ /;s/[>)] / /;s/ /,0x/g'`
 echo -n "       .byte 0x" > $T.s
 echo $code >> $T.s
-as $AFLAGS -o $T.o $T.s
-objdump -S $T.o
-rm $T $T.s $T.o
+as $AFLAGS -o $T.o $T.s &> /dev/null
+objdump -S $T.o | grep -v "Disassembly" | grep -v "/tmp" | grep -v "\.text" | grep -v "^$" &> $T.aaa
+cat $T.aaa >> $T.aa
+
+faultline=`cat $T.aaa | head -1 | cut -d":" -f2`
+
+cat $T.oo | sed -e "s/\($faultline\)/\*\1     <-- trapping instruction/g"
+echo
+cat $T.aa
+cleanup
diff --git a/scripts/extract-ikconfig b/scripts/extract-ikconfig
index 8187e6f0dc2f..72997c353cb3 100755
--- a/scripts/extract-ikconfig
+++ b/scripts/extract-ikconfig
@@ -8,8 +8,8 @@ test -e $binoffset || cc -o $binoffset ./scripts/binoffset.c || exit 1
 
 IKCFG_ST="0x49 0x4b 0x43 0x46 0x47 0x5f 0x53 0x54"
 IKCFG_ED="0x49 0x4b 0x43 0x46 0x47 0x5f 0x45 0x44"
-function dump_config {
-    typeset file="$1"
+dump_config() {
+    file="$1"
 
     start=`$binoffset $file $IKCFG_ST 2>/dev/null`
     [ "$?" != "0" ] && start="-1"
@@ -18,8 +18,8 @@ function dump_config {
     fi
     end=`$binoffset $file $IKCFG_ED 2>/dev/null`
 
-    let start="$start + 8"
-    let size="$end - $start"
+    start=`expr $start + 8`
+    size=`expr $end - $start`
 
     dd if="$file" ibs=1 skip="$start" count="$size" 2>/dev/null | zcat
 
diff --git a/scripts/genksyms/genksyms.c b/scripts/genksyms/genksyms.c
index c249274e005a..f8bb4cabd62d 100644
--- a/scripts/genksyms/genksyms.c
+++ b/scripts/genksyms/genksyms.c
@@ -42,7 +42,8 @@ static FILE *debugfile;
 int cur_line = 1;
 char *cur_filename;
 
-static int flag_debug, flag_dump_defs, flag_dump_types, flag_warnings;
+static int flag_debug, flag_dump_defs, flag_reference, flag_dump_types,
+           flag_preserve, flag_warnings, flag_asm;
 static const char *arch = "";
 static const char *mod_prefix = "";
 
@@ -58,6 +59,8 @@ static const char *const symbol_type_name[] = {
 
 static int equal_list(struct string_list *a, struct string_list *b);
 static void print_list(FILE * f, struct string_list *list);
+static void print_location(void);
+static void print_type_name(enum symbol_type type, const char *name);
 
 /*----------------------------------------------------------------------*/
 
@@ -151,27 +154,83 @@ struct symbol *find_symbol(const char *name, enum symbol_type ns)
 
         for (sym = symtab[h]; sym; sym = sym->hash_next)
                 if (map_to_ns(sym->type) == map_to_ns(ns) &&
-                    strcmp(name, sym->name) == 0)
+                    strcmp(name, sym->name) == 0 &&
+                    sym->is_declared)
                         break;
 
         return sym;
 }
 
-struct symbol *add_symbol(const char *name, enum symbol_type type,
-                          struct string_list *defn, int is_extern)
+static int is_unknown_symbol(struct symbol *sym)
+{
+        struct string_list *defn;
+
+        return ((sym->type == SYM_STRUCT ||
+                 sym->type == SYM_UNION ||
+                 sym->type == SYM_ENUM) &&
+                (defn = sym->defn)  && defn->tag == SYM_NORMAL &&
+                        strcmp(defn->string, "}") == 0 &&
+                (defn = defn->next) && defn->tag == SYM_NORMAL &&
+                        strcmp(defn->string, "UNKNOWN") == 0 &&
+                (defn = defn->next) && defn->tag == SYM_NORMAL &&
+                        strcmp(defn->string, "{") == 0);
+}
+
+struct symbol *__add_symbol(const char *name, enum symbol_type type,
+                            struct string_list *defn, int is_extern,
+                            int is_reference)
 {
         unsigned long h = crc32(name) % HASH_BUCKETS;
         struct symbol *sym;
+        enum symbol_status status = STATUS_UNCHANGED;
 
         for (sym = symtab[h]; sym; sym = sym->hash_next) {
-                if (map_to_ns(sym->type) == map_to_ns(type)
-                    && strcmp(name, sym->name) == 0) {
-                        if (!equal_list(sym->defn, defn))
+                if (map_to_ns(sym->type) == map_to_ns(type) &&
+                    strcmp(name, sym->name) == 0) {
+                        if (is_reference)
+                                /* fall through */ ;
+                        else if (sym->type == type &&
+                                 equal_list(sym->defn, defn)) {
+                                if (!sym->is_declared && sym->is_override) {
+                                        print_location();
+                                        print_type_name(type, name);
+                                        fprintf(stderr, " modversion is "
+                                                "unchanged\n");
+                                }
+                                sym->is_declared = 1;
+                                return sym;
+                        } else if (!sym->is_declared) {
+                                if (sym->is_override && flag_preserve) {
+                                        print_location();
+                                        fprintf(stderr, "ignoring ");
+                                        print_type_name(type, name);
+                                        fprintf(stderr, " modversion change\n");
+                                        sym->is_declared = 1;
+                                        return sym;
+                                } else {
+                                        status = is_unknown_symbol(sym) ?
+                                                STATUS_DEFINED : STATUS_MODIFIED;
+                                }
+                        } else {
                                 error_with_pos("redefinition of %s", name);
-                        return sym;
+                                return sym;
+                        }
+                        break;
                 }
         }
 
+        if (sym) {
+                struct symbol **psym;
+
+                for (psym = &symtab[h]; *psym; psym = &(*psym)->hash_next) {
+                        if (*psym == sym) {
+                                *psym = sym->hash_next;
+                                break;
+                        }
+                }
+                --nsyms;
+        }
+
         sym = xmalloc(sizeof(*sym));
         sym->name = name;
         sym->type = type;
@@ -183,6 +242,10 @@ struct symbol *add_symbol(const char *name, enum symbol_type type,
         sym->hash_next = symtab[h];
         symtab[h] = sym;
 
+        sym->is_declared = !is_reference;
+        sym->status = status;
+        sym->is_override = 0;
+
         if (flag_debug) {
                 fprintf(debugfile, "Defn for %s %s == <",
                         symbol_type_name[type], name);
@@ -196,6 +259,18 @@ struct symbol *add_symbol(const char *name, enum symbol_type type,
         return sym;
 }
 
+struct symbol *add_symbol(const char *name, enum symbol_type type,
+                          struct string_list *defn, int is_extern)
+{
+        return __add_symbol(name, type, defn, is_extern, 0);
+}
+
+struct symbol *add_reference_symbol(const char *name, enum symbol_type type,
+                                    struct string_list *defn, int is_extern)
+{
+        return __add_symbol(name, type, defn, is_extern, 1);
+}
+
 /*----------------------------------------------------------------------*/
 
 void free_node(struct string_list *node)
@@ -236,6 +311,90 @@ static int equal_list(struct string_list *a, struct string_list *b)
         return !a && !b;
 }
 
+#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
+
+struct string_list *read_node(FILE *f)
+{
+        char buffer[256];
+        struct string_list node = {
+                .string = buffer,
+                .tag = SYM_NORMAL };
+        int c;
+
+        while ((c = fgetc(f)) != EOF) {
+                if (c == ' ') {
+                        if (node.string == buffer)
+                                continue;
+                        break;
+                } else if (c == '\n') {
+                        if (node.string == buffer)
+                                return NULL;
+                        ungetc(c, f);
+                        break;
+                }
+                if (node.string >= buffer + sizeof(buffer) - 1) {
+                        fprintf(stderr, "Token too long\n");
+                        exit(1);
+                }
+                *node.string++ = c;
+        }
+        if (node.string == buffer)
+                return NULL;
+        *node.string = 0;
+        node.string = buffer;
+
+        if (node.string[1] == '#') {
+                int n;
+
+                for (n = 0; n < ARRAY_SIZE(symbol_type_name); n++) {
+                        if (node.string[0] == symbol_type_name[n][0]) {
+                                node.tag = n;
+                                node.string += 2;
+                                return copy_node(&node);
+                        }
+                }
+                fprintf(stderr, "Unknown type %c\n", node.string[0]);
+                exit(1);
+        }
+        return copy_node(&node);
+}
+
+static void read_reference(FILE *f)
+{
+        while (!feof(f)) {
+                struct string_list *defn = NULL;
+                struct string_list *sym, *def;
+                int is_extern = 0, is_override = 0;
+                struct symbol *subsym;
+
+                sym = read_node(f);
+                if (sym && sym->tag == SYM_NORMAL &&
+                    !strcmp(sym->string, "override")) {
+                        is_override = 1;
+                        free_node(sym);
+                        sym = read_node(f);
+                }
+                if (!sym)
+                        continue;
+                def = read_node(f);
+                if (def && def->tag == SYM_NORMAL &&
+                    !strcmp(def->string, "extern")) {
+                        is_extern = 1;
+                        free_node(def);
+                        def = read_node(f);
+                }
+                while (def) {
+                        def->next = defn;
+                        defn = def;
+                        def = read_node(f);
+                }
+                subsym = add_reference_symbol(xstrdup(sym->string), sym->tag,
+                                              defn, is_extern);
+                subsym->is_override = is_override;
+                free_node(sym);
+        }
+}
+
 static void print_node(FILE * f, struct string_list *list)
 {
         if (list->tag != SYM_NORMAL) {
@@ -311,6 +470,7 @@ static unsigned long expand_and_crc_sym(struct symbol *sym, unsigned long crc)
 
                 case SYM_TYPEDEF:
                         subsym = find_symbol(cur->string, cur->tag);
+                        /* FIXME: Bad reference files can segfault here. */
                         if (subsym->expansion_trail) {
                                 if (flag_dump_defs)
                                         fprintf(debugfile, "%s ", cur->string);
@@ -347,9 +507,22 @@ static unsigned long expand_and_crc_sym(struct symbol *sym, unsigned long crc)
                                 t = n;
 
                                 n = xmalloc(sizeof(*n));
-                                n->string = xstrdup("{ UNKNOWN }");
+                                n->string = xstrdup("{");
+                                n->tag = SYM_NORMAL;
+                                n->next = t;
+                                t = n;
+
+                                n = xmalloc(sizeof(*n));
+                                n->string = xstrdup("UNKNOWN");
+                                n->tag = SYM_NORMAL;
+                                n->next = t;
+                                t = n;
+
+                                n = xmalloc(sizeof(*n));
+                                n->string = xstrdup("}");
                                 n->tag = SYM_NORMAL;
                                 n->next = t;
+                                t = n;
 
                                 subsym =
                                     add_symbol(cur->string, cur->tag, n, 0);
@@ -397,37 +570,75 @@ void export_symbol(const char *name)
                 error_with_pos("export undefined symbol %s", name);
         else {
                 unsigned long crc;
+                int has_changed = 0;
 
                 if (flag_dump_defs)
                         fprintf(debugfile, "Export %s == <", name);
 
                 expansion_trail = (struct symbol *)-1L;
 
+                sym->expansion_trail = expansion_trail;
+                expansion_trail = sym;
                 crc = expand_and_crc_sym(sym, 0xffffffff) ^ 0xffffffff;
 
                 sym = expansion_trail;
                 while (sym != (struct symbol *)-1L) {
                         struct symbol *n = sym->expansion_trail;
+
+                        if (sym->status != STATUS_UNCHANGED) {
+                                if (!has_changed) {
+                                        print_location();
+                                        fprintf(stderr, "%s: %s: modversion "
+                                                "changed because of changes "
+                                                "in ", flag_preserve ? "error" :
+                                                       "warning", name);
+                                } else
+                                        fprintf(stderr, ", ");
+                                print_type_name(sym->type, sym->name);
+                                if (sym->status == STATUS_DEFINED)
+                                        fprintf(stderr, " (became defined)");
+                                has_changed = 1;
+                                if (flag_preserve)
+                                        errors++;
+                        }
                         sym->expansion_trail = 0;
                         sym = n;
                 }
+                if (has_changed)
+                        fprintf(stderr, "\n");
 
                 if (flag_dump_defs)
                         fputs(">\n", debugfile);
 
-                /* Used as a linker script. */
-                printf("%s__crc_%s = 0x%08lx ;\n", mod_prefix, name, crc);
+                /* Used as assembly source or a linker script. */
+                printf(flag_asm
+                       ? ".equiv %s__crc_%s, %#08lx\n"
+                       : "%s__crc_%s = %#08lx ;\n",
+                       mod_prefix, name, crc);
         }
 }
 
 /*----------------------------------------------------------------------*/
+
+static void print_location(void)
+{
+        fprintf(stderr, "%s:%d: ", cur_filename ? : "<stdin>", cur_line);
+}
+
+static void print_type_name(enum symbol_type type, const char *name)
+{
+        if (type != SYM_NORMAL)
+                fprintf(stderr, "%s %s", symbol_type_name[type], name);
+        else
+                fprintf(stderr, "%s", name);
+}
+
 void error_with_pos(const char *fmt, ...)
 {
         va_list args;
 
         if (flag_warnings) {
-                fprintf(stderr, "%s:%d: ", cur_filename ? : "<stdin>",
-                        cur_line);
+                print_location();
 
                 va_start(args, fmt);
                 vfprintf(stderr, fmt, args);
@@ -440,21 +651,27 @@ void error_with_pos(const char *fmt, ...)
 
 static void genksyms_usage(void)
 {
-        fputs("Usage:\n" "genksyms [-adDTwqhV] > /path/to/.tmp_obj.ver\n" "\n"
+        fputs("Usage:\n" "genksyms [-aAdDTwqhV] > /path/to/.tmp_obj.ver\n" "\n"
 #ifdef __GNU_LIBRARY__
               "  -a, --arch            Select architecture\n"
+              "  -A, --asm             Generate assembly rather than linker script\n"
               "  -d, --debug           Increment the debug level (repeatable)\n"
               "  -D, --dump            Dump expanded symbol defs (for debugging only)\n"
-              "  -T, --dump-types file Dump expanded types into file (for debugging only)\n"
+              "  -r, --reference file  Read reference symbols from a file\n"
+              "  -T, --dump-types file Dump expanded types into file\n"
+              "  -p, --preserve        Preserve reference modversions or fail\n"
               "  -w, --warnings        Enable warnings\n"
               "  -q, --quiet           Disable warnings (default)\n"
               "  -h, --help            Print this message\n"
               "  -V, --version         Print the release version\n"
 #else                           /* __GNU_LIBRARY__ */
               "  -a                    Select architecture\n"
+              "  -A                    Generate assembly rather than linker script\n"
               "  -d                    Increment the debug level (repeatable)\n"
               "  -D                    Dump expanded symbol defs (for debugging only)\n"
-              "  -T file               Dump expanded types into file (for debugging only)\n"
+              "  -r file               Read reference symbols from a file\n"
+              "  -T file               Dump expanded types into file\n"
+              "  -p                    Preserve reference modversions or fail\n"
               "  -w                    Enable warnings\n"
               "  -q                    Disable warnings (default)\n"
               "  -h                    Print this message\n"
@@ -465,26 +682,29 @@ static void genksyms_usage(void)
 
 int main(int argc, char **argv)
 {
-        FILE *dumpfile = NULL;
+        FILE *dumpfile = NULL, *ref_file = NULL;
         int o;
 
 #ifdef __GNU_LIBRARY__
         struct option long_opts[] = {
                 {"arch", 1, 0, 'a'},
+                {"asm", 0, 0, 'A'},
                 {"debug", 0, 0, 'd'},
                 {"warnings", 0, 0, 'w'},
                 {"quiet", 0, 0, 'q'},
                 {"dump", 0, 0, 'D'},
+                {"reference", 1, 0, 'r'},
                 {"dump-types", 1, 0, 'T'},
+                {"preserve", 0, 0, 'p'},
                 {"version", 0, 0, 'V'},
                 {"help", 0, 0, 'h'},
                 {0, 0, 0, 0}
         };
 
-        while ((o = getopt_long(argc, argv, "a:dwqVDT:h",
+        while ((o = getopt_long(argc, argv, "a:dwqVADr:T:ph",
                                 &long_opts[0], NULL)) != EOF)
 #else                           /* __GNU_LIBRARY__ */
-        while ((o = getopt(argc, argv, "a:dwqVDT:h")) != EOF)
+        while ((o = getopt(argc, argv, "a:dwqVADr:T:ph")) != EOF)
 #endif                          /* __GNU_LIBRARY__ */
                 switch (o) {
                 case 'a':
@@ -502,9 +722,20 @@ int main(int argc, char **argv)
                 case 'V':
                         fputs("genksyms version 2.5.60\n", stderr);
                         break;
+                case 'A':
+                        flag_asm = 1;
+                        break;
                 case 'D':
                         flag_dump_defs = 1;
                         break;
+                case 'r':
+                        flag_reference = 1;
+                        ref_file = fopen(optarg, "r");
+                        if (!ref_file) {
+                                perror(optarg);
+                                return 1;
+                        }
+                        break;
                 case 'T':
                         flag_dump_types = 1;
                         dumpfile = fopen(optarg, "w");
@@ -513,6 +744,9 @@ int main(int argc, char **argv)
                                 return 1;
                         }
                         break;
+                case 'p':
+                        flag_preserve = 1;
+                        break;
                 case 'h':
                         genksyms_usage();
                         return 0;
@@ -533,12 +767,17 @@ int main(int argc, char **argv)
                 /* setlinebuf(debugfile); */
         }
 
+        if (flag_reference)
+                read_reference(ref_file);
+
         yyparse();
 
         if (flag_dump_types && visited_symbols) {
                 while (visited_symbols != (struct symbol *)-1L) {
                         struct symbol *sym = visited_symbols;
 
+                        if (sym->is_override)
+                                fputs("override ", dumpfile);
                         if (sym->type != SYM_NORMAL) {
                                 putc(symbol_type_name[sym->type][0], dumpfile);
                                 putc('#', dumpfile);
diff --git a/scripts/genksyms/genksyms.h b/scripts/genksyms/genksyms.h
index 2668287aa498..25c4d40cefc1 100644
--- a/scripts/genksyms/genksyms.h
+++ b/scripts/genksyms/genksyms.h
@@ -29,6 +29,10 @@ enum symbol_type {
         SYM_NORMAL, SYM_TYPEDEF, SYM_ENUM, SYM_STRUCT, SYM_UNION
 };
 
+enum symbol_status {
+        STATUS_UNCHANGED, STATUS_DEFINED, STATUS_MODIFIED
+};
+
 struct string_list {
         struct string_list *next;
         enum symbol_type tag;
@@ -43,6 +47,9 @@ struct symbol {
         struct symbol *expansion_trail;
         struct symbol *visited;
         int is_extern;
+        int is_declared;
+        enum symbol_status status;
+        int is_override;
 };
 
 typedef struct string_list **yystype;
diff --git a/scripts/genksyms/keywords.c_shipped b/scripts/genksyms/keywords.c_shipped
index 971e0113ae7a..83484fe93ede 100644
--- a/scripts/genksyms/keywords.c_shipped
+++ b/scripts/genksyms/keywords.c_shipped
@@ -1,4 +1,4 @@
-/* ANSI-C code produced by gperf version 3.0.2 */
+/* ANSI-C code produced by gperf version 3.0.1 */
 /* Command-line: gperf -L ANSI-C -a -C -E -g -H is_reserved_hash -k '1,3,$' -N is_reserved_word -p -t scripts/genksyms/keywords.gperf  */
 
 #if !((' ' == 32) && ('!' == 33) && ('"' == 34) && ('#' == 35) \
@@ -32,7 +32,7 @@
 
 #line 3 "scripts/genksyms/keywords.gperf"
 struct resword { const char *name; int token; };
-/* maximum key range = 62, duplicates = 0 */
+/* maximum key range = 64, duplicates = 0 */
 
 #ifdef __GNUC__
 __inline
@@ -46,32 +46,32 @@ is_reserved_hash (register const char *str, register unsigned int len)
 {
   static const unsigned char asso_values[] =
     {
-      65, 65, 65, 65, 65, 65, 65, 65, 65, 65,
-      65, 65, 65, 65, 65, 65, 65, 65, 65, 65,
-      65, 65, 65, 65, 65, 65, 65, 65, 65, 65,
-      65, 65, 65, 65, 65, 65, 65, 65, 65, 65,
-      65, 65, 65, 65, 65, 65, 65, 65, 65, 65,
-      65, 65, 65, 65, 65, 65, 65, 65, 65, 65,
-      65, 65, 65, 65, 65, 65, 65, 65, 65,  5,
-      65, 65, 65, 65, 65, 65, 35, 65, 65, 65,
-       0, 65, 65, 65, 65, 65, 65, 65, 65, 65,
-      65, 65, 65, 65, 65,  0, 65,  0, 65,  5,
-      20, 15, 10, 30, 65, 15, 65, 65, 20,  0,
-      10, 35, 20, 65, 10,  5,  0, 10,  5, 65,
-      65, 65, 65, 65, 65, 65, 65, 65, 65, 65,
-      65, 65, 65, 65, 65, 65, 65, 65, 65, 65,
-      65, 65, 65, 65, 65, 65, 65, 65, 65, 65,
-      65, 65, 65, 65, 65, 65, 65, 65, 65, 65,
-      65, 65, 65, 65, 65, 65, 65, 65, 65, 65,
-      65, 65, 65, 65, 65, 65, 65, 65, 65, 65,
-      65, 65, 65, 65, 65, 65, 65, 65, 65, 65,
-      65, 65, 65, 65, 65, 65, 65, 65, 65, 65,
-      65, 65, 65, 65, 65, 65, 65, 65, 65, 65,
-      65, 65, 65, 65, 65, 65, 65, 65, 65, 65,
-      65, 65, 65, 65, 65, 65, 65, 65, 65, 65,
-      65, 65, 65, 65, 65, 65, 65, 65, 65, 65,
-      65, 65, 65, 65, 65, 65, 65, 65, 65, 65,
-      65, 65, 65, 65, 65, 65
+      67, 67, 67, 67, 67, 67, 67, 67, 67, 67,
+      67, 67, 67, 67, 67, 67, 67, 67, 67, 67,
+      67, 67, 67, 67, 67, 67, 67, 67, 67, 67,
+      67, 67, 67, 67, 67, 67, 67, 67, 67, 67,
+      67, 67, 67, 67, 67, 67, 67, 67, 67, 67,
+      67, 67, 67, 67, 67, 67, 67, 67, 67, 67,
+      67, 67, 67, 67, 67, 67, 67, 67, 67,  0,
+      67, 67, 67, 67, 67, 67, 15, 67, 67, 67,
+       0, 67, 67, 67, 67, 67, 67, 67, 67, 67,
+      67, 67, 67, 67, 67,  0, 67,  0, 67,  5,
+      25, 20, 15, 30, 67, 15, 67, 67, 10,  0,
+      10, 40, 20, 67, 10,  5,  0, 10, 15, 67,
+      67, 67, 67, 67, 67, 67, 67, 67, 67, 67,
+      67, 67, 67, 67, 67, 67, 67, 67, 67, 67,
+      67, 67, 67, 67, 67, 67, 67, 67, 67, 67,
+      67, 67, 67, 67, 67, 67, 67, 67, 67, 67,
+      67, 67, 67, 67, 67, 67, 67, 67, 67, 67,
+      67, 67, 67, 67, 67, 67, 67, 67, 67, 67,
+      67, 67, 67, 67, 67, 67, 67, 67, 67, 67,
+      67, 67, 67, 67, 67, 67, 67, 67, 67, 67,
+      67, 67, 67, 67, 67, 67, 67, 67, 67, 67,
+      67, 67, 67, 67, 67, 67, 67, 67, 67, 67,
+      67, 67, 67, 67, 67, 67, 67, 67, 67, 67,
+      67, 67, 67, 67, 67, 67, 67, 67, 67, 67,
+      67, 67, 67, 67, 67, 67, 67, 67, 67, 67,
+      67, 67, 67, 67, 67, 67
     };
   return len + asso_values[(unsigned char)str[2]] + asso_values[(unsigned char)str[0]] + asso_values[(unsigned char)str[len - 1]];
 }
@@ -84,116 +84,119 @@ is_reserved_word (register const char *str, register unsigned int len)
 {
   enum
     {
-      TOTAL_KEYWORDS = 43,
+      TOTAL_KEYWORDS = 45,
       MIN_WORD_LENGTH = 3,
       MAX_WORD_LENGTH = 24,
       MIN_HASH_VALUE = 3,
-      MAX_HASH_VALUE = 64
+      MAX_HASH_VALUE = 66
     };
 
   static const struct resword wordlist[] =
     {
       {""}, {""}, {""},
-#line 26 "scripts/genksyms/keywords.gperf"
+#line 28 "scripts/genksyms/keywords.gperf"
       {"asm", ASM_KEYW},
       {""},
-#line 8 "scripts/genksyms/keywords.gperf"
+#line 10 "scripts/genksyms/keywords.gperf"
       {"__asm", ASM_KEYW},
       {""},
-#line 9 "scripts/genksyms/keywords.gperf"
+#line 11 "scripts/genksyms/keywords.gperf"
       {"__asm__", ASM_KEYW},
       {""}, {""},
-#line 52 "scripts/genksyms/keywords.gperf"
+#line 54 "scripts/genksyms/keywords.gperf"
       {"__typeof__", TYPEOF_KEYW},
       {""},
-#line 12 "scripts/genksyms/keywords.gperf"
+#line 14 "scripts/genksyms/keywords.gperf"
       {"__const", CONST_KEYW},
-#line 11 "scripts/genksyms/keywords.gperf"
-      {"__attribute__", ATTRIBUTE_KEYW},
 #line 13 "scripts/genksyms/keywords.gperf"
+      {"__attribute__", ATTRIBUTE_KEYW},
+#line 15 "scripts/genksyms/keywords.gperf"
       {"__const__", CONST_KEYW},
-#line 18 "scripts/genksyms/keywords.gperf"
+#line 20 "scripts/genksyms/keywords.gperf"
       {"__signed__", SIGNED_KEYW},
-#line 44 "scripts/genksyms/keywords.gperf"
+#line 46 "scripts/genksyms/keywords.gperf"
       {"static", STATIC_KEYW},
-#line 20 "scripts/genksyms/keywords.gperf"
-      {"__volatile__", VOLATILE_KEYW},
-#line 39 "scripts/genksyms/keywords.gperf"
+      {""},
+#line 41 "scripts/genksyms/keywords.gperf"
       {"int", INT_KEYW},
-#line 32 "scripts/genksyms/keywords.gperf"
+#line 34 "scripts/genksyms/keywords.gperf"
       {"char", CHAR_KEYW},
-#line 33 "scripts/genksyms/keywords.gperf"
+#line 35 "scripts/genksyms/keywords.gperf"
       {"const", CONST_KEYW},
-#line 45 "scripts/genksyms/keywords.gperf"
+#line 47 "scripts/genksyms/keywords.gperf"
       {"struct", STRUCT_KEYW},
-#line 24 "scripts/genksyms/keywords.gperf"
+#line 26 "scripts/genksyms/keywords.gperf"
       {"__restrict__", RESTRICT_KEYW},
-#line 25 "scripts/genksyms/keywords.gperf"
+#line 27 "scripts/genksyms/keywords.gperf"
       {"restrict", RESTRICT_KEYW},
-#line 23 "scripts/genksyms/keywords.gperf"
-      {"_restrict", RESTRICT_KEYW},
-#line 16 "scripts/genksyms/keywords.gperf"
+#line 7 "scripts/genksyms/keywords.gperf"
+      {"EXPORT_SYMBOL_GPL_FUTURE", EXPORT_SYMBOL_KEYW},
+#line 18 "scripts/genksyms/keywords.gperf"
       {"__inline__", INLINE_KEYW},
-#line 10 "scripts/genksyms/keywords.gperf"
-      {"__attribute", ATTRIBUTE_KEYW},
       {""},
-#line 14 "scripts/genksyms/keywords.gperf"
+#line 22 "scripts/genksyms/keywords.gperf"
+      {"__volatile__", VOLATILE_KEYW},
+#line 5 "scripts/genksyms/keywords.gperf"
+      {"EXPORT_SYMBOL", EXPORT_SYMBOL_KEYW},
+#line 25 "scripts/genksyms/keywords.gperf"
+      {"_restrict", RESTRICT_KEYW},
+      {""},
+#line 12 "scripts/genksyms/keywords.gperf"
+      {"__attribute", ATTRIBUTE_KEYW},
+#line 6 "scripts/genksyms/keywords.gperf"
+      {"EXPORT_SYMBOL_GPL", EXPORT_SYMBOL_KEYW},
+#line 16 "scripts/genksyms/keywords.gperf"
       {"__extension__", EXTENSION_KEYW},
-#line 35 "scripts/genksyms/keywords.gperf"
+#line 37 "scripts/genksyms/keywords.gperf"
       {"enum", ENUM_KEYW},
-#line 19 "scripts/genksyms/keywords.gperf"
-      {"__volatile", VOLATILE_KEYW},
-#line 36 "scripts/genksyms/keywords.gperf"
+#line 8 "scripts/genksyms/keywords.gperf"
+      {"EXPORT_UNUSED_SYMBOL", EXPORT_SYMBOL_KEYW},
+#line 38 "scripts/genksyms/keywords.gperf"
       {"extern", EXTERN_KEYW},
       {""},
-#line 17 "scripts/genksyms/keywords.gperf"
+#line 19 "scripts/genksyms/keywords.gperf"
       {"__signed", SIGNED_KEYW},
-#line 7 "scripts/genksyms/keywords.gperf"
-      {"EXPORT_SYMBOL_GPL_FUTURE", EXPORT_SYMBOL_KEYW},
-      {""},
-#line 51 "scripts/genksyms/keywords.gperf"
+#line 9 "scripts/genksyms/keywords.gperf"
+      {"EXPORT_UNUSED_SYMBOL_GPL", EXPORT_SYMBOL_KEYW},
+#line 49 "scripts/genksyms/keywords.gperf"
+      {"union", UNION_KEYW},
+#line 53 "scripts/genksyms/keywords.gperf"
       {"typeof", TYPEOF_KEYW},
-#line 46 "scripts/genksyms/keywords.gperf"
+#line 48 "scripts/genksyms/keywords.gperf"
       {"typedef", TYPEDEF_KEYW},
-#line 15 "scripts/genksyms/keywords.gperf"
+#line 17 "scripts/genksyms/keywords.gperf"
       {"__inline", INLINE_KEYW},
-#line 31 "scripts/genksyms/keywords.gperf"
+#line 33 "scripts/genksyms/keywords.gperf"
       {"auto", AUTO_KEYW},
-#line 47 "scripts/genksyms/keywords.gperf"
-      {"union", UNION_KEYW},
-      {""}, {""},
-#line 48 "scripts/genksyms/keywords.gperf"
-      {"unsigned", UNSIGNED_KEYW},
-#line 49 "scripts/genksyms/keywords.gperf"
-      {"void", VOID_KEYW},
-#line 42 "scripts/genksyms/keywords.gperf"
-      {"short", SHORT_KEYW},
+#line 21 "scripts/genksyms/keywords.gperf"
+      {"__volatile", VOLATILE_KEYW},
       {""}, {""},
 #line 50 "scripts/genksyms/keywords.gperf"
-      {"volatile", VOLATILE_KEYW},
-      {""},
-#line 37 "scripts/genksyms/keywords.gperf"
-      {"float", FLOAT_KEYW},
-#line 34 "scripts/genksyms/keywords.gperf"
-      {"double", DOUBLE_KEYW},
+      {"unsigned", UNSIGNED_KEYW},
       {""},
-#line 5 "scripts/genksyms/keywords.gperf"
-      {"EXPORT_SYMBOL", EXPORT_SYMBOL_KEYW},
-      {""}, {""},
-#line 38 "scripts/genksyms/keywords.gperf"
+#line 44 "scripts/genksyms/keywords.gperf"
+      {"short", SHORT_KEYW},
+#line 40 "scripts/genksyms/keywords.gperf"
       {"inline", INLINE_KEYW},
-#line 6 "scripts/genksyms/keywords.gperf"
-      {"EXPORT_SYMBOL_GPL", EXPORT_SYMBOL_KEYW},
-#line 41 "scripts/genksyms/keywords.gperf"
-      {"register", REGISTER_KEYW},
       {""},
-#line 22 "scripts/genksyms/keywords.gperf"
+#line 52 "scripts/genksyms/keywords.gperf"
+      {"volatile", VOLATILE_KEYW},
+#line 42 "scripts/genksyms/keywords.gperf"
+      {"long", LONG_KEYW},
+#line 24 "scripts/genksyms/keywords.gperf"
       {"_Bool", BOOL_KEYW},
-#line 43 "scripts/genksyms/keywords.gperf"
-      {"signed", SIGNED_KEYW},
       {""}, {""},
-#line 40 "scripts/genksyms/keywords.gperf"
-      {"long", LONG_KEYW}
+#line 43 "scripts/genksyms/keywords.gperf"
+      {"register", REGISTER_KEYW},
+#line 51 "scripts/genksyms/keywords.gperf"
+      {"void", VOID_KEYW},
+#line 39 "scripts/genksyms/keywords.gperf"
+      {"float", FLOAT_KEYW},
+#line 36 "scripts/genksyms/keywords.gperf"
+      {"double", DOUBLE_KEYW},
+      {""}, {""}, {""}, {""},
+#line 45 "scripts/genksyms/keywords.gperf"
+      {"signed", SIGNED_KEYW}
     };
 
   if (len <= MAX_WORD_LENGTH && len >= MIN_WORD_LENGTH)
diff --git a/scripts/genksyms/keywords.gperf b/scripts/genksyms/keywords.gperf
index 5ef3733225fb..8abe7ab8d88f 100644
--- a/scripts/genksyms/keywords.gperf
+++ b/scripts/genksyms/keywords.gperf
@@ -5,6 +5,8 @@ struct resword { const char *name; int token; }
 EXPORT_SYMBOL, EXPORT_SYMBOL_KEYW
 EXPORT_SYMBOL_GPL, EXPORT_SYMBOL_KEYW
 EXPORT_SYMBOL_GPL_FUTURE, EXPORT_SYMBOL_KEYW
+EXPORT_UNUSED_SYMBOL, EXPORT_SYMBOL_KEYW
+EXPORT_UNUSED_SYMBOL_GPL, EXPORT_SYMBOL_KEYW
 __asm, ASM_KEYW
 __asm__, ASM_KEYW
 __attribute, ATTRIBUTE_KEYW
diff --git a/scripts/headerdep.pl b/scripts/headerdep.pl
new file mode 100755
index 000000000000..97399da89ef2
--- /dev/null
+++ b/scripts/headerdep.pl
@@ -0,0 +1,193 @@
+#! /usr/bin/perl
+#
+# Detect cycles in the header file dependency graph
+# Vegard Nossum <vegardno@ifi.uio.no>
+#
+
+use strict;
+use warnings;
+
+use Getopt::Long;
+
+my $opt_all;
+my @opt_include;
+my $opt_graph;
+
+&Getopt::Long::Configure(qw(bundling pass_through));
+&GetOptions(
+        help    => \&help,
+        version => \&version,
+
+        all     => \$opt_all,
+        I       => \@opt_include,
+        graph   => \$opt_graph,
+);
+
+push @opt_include, 'include';
+my %deps = ();
+my %linenos = ();
+
+my @headers = grep { strip($_) } @ARGV;
+
+parse_all(@headers);
+
+if($opt_graph) {
+        graph();
+} else {
+        detect_cycles(@headers);
+}
+
+
+sub help {
+        print "Usage: $0 [options] file...\n";
+        print "\n";
+        print "Options:\n";
+        print "  --all\n";
+        print "  --graph\n";
+        print "\n";
+        print "  -I includedir\n";
+        print "\n";
+        print "To make nice graphs, try:\n";
+        print "  $0 --graph include/linux/kernel.h | dot -Tpng -o graph.png\n";
+        exit;
+}
+
+sub version {
+        print "headerdep version 2\n";
+        exit;
+}
+
+# Get a file name that is relative to our include paths
+sub strip {
+        my $filename = shift;
+
+        for my $i (@opt_include) {
+                my $stripped = $filename;
+                $stripped =~ s/^$i\///;
+
+                return $stripped if $stripped ne $filename;
+        }
+
+        return $filename;
+}
+
+# Search for the file name in the list of include paths
+sub search {
+        my $filename = shift;
+        return $filename if -f $filename;
+
+        for my $i (@opt_include) {
+                my $path = "$i/$filename";
+                return $path if -f $path;
+        }
+
+        return undef;
+}
+
+sub parse_all {
+        # Parse all the headers.
+        my @queue = @_;
+        while(@queue) {
+                my $header = pop @queue;
+                next if exists $deps{$header};
+
+                $deps{$header} = [] unless exists $deps{$header};
+
+                my $path = search($header);
+                next unless $path;
+
+                open(my $file, '<', $path) or die($!);
+                chomp(my @lines = <$file>);
+                close($file);
+
+                for my $i (0 .. $#lines) {
+                        my $line = $lines[$i];
+                        if(my($dep) = ($line =~ m/^#\s*include\s*<(.*?)>/)) {
+                                push @queue, $dep;
+                                push @{$deps{$header}}, [$i + 1, $dep];
+                        }
+                }
+        }
+}
+
+sub print_cycle {
+        # $cycle[n] includes $cycle[n + 1];
+        # $cycle[-1] will be the culprit
+        my $cycle = shift;
+
+        # Adjust the line numbers
+        for my $i (0 .. $#$cycle - 1) {
+                $cycle->[$i]->[0] = $cycle->[$i + 1]->[0];
+        }
+        $cycle->[-1]->[0] = 0;
+
+        my $first = shift @$cycle;
+        my $last = pop @$cycle;
+
+        my $msg = "In file included";
+        printf "%s from %s,\n", $msg, $last->[1] if defined $last;
+
+        for my $header (reverse @$cycle) {
+                printf "%s from %s:%d%s\n",
+                        " " x length $msg,
+                        $header->[1], $header->[0],
+                        $header->[1] eq $last->[1] ? ' <-- here' : '';
+        }
+
+        printf "%s:%d: warning: recursive header inclusion\n",
+                $first->[1], $first->[0];
+}
+
+# Find and print the smallest cycle starting in the specified node.
+sub detect_cycles {
+        my @queue = map { [[0, $_]] } @_;
+        while(@queue) {
+                my $top = pop @queue;
+                my $name = $top->[-1]->[1];
+
+                for my $dep (@{$deps{$name}}) {
+                        my $chain = [@$top, [$dep->[0], $dep->[1]]];
+
+                        # If the dep already exists in the chain, we have a
+                        # cycle...
+                        if(grep { $_->[1] eq $dep->[1] } @$top) {
+                                print_cycle($chain);
+                                next if $opt_all;
+                                return;
+                        }
+
+                        push @queue, $chain;
+                }
+        }
+}
+
+sub mangle {
+        $_ = shift;
+        s/\//__/g;
+        s/\./_/g;
+        s/-/_/g;
+        $_;
+}
+
+# Output dependency graph in GraphViz language.
+sub graph {
+        print "digraph {\n";
+
+        print "\t/* vertices */\n";
+        for my $header (keys %deps) {
+                printf "\t%s [label=\"%s\"];\n",
+                        mangle($header), $header;
+        }
+
+        print "\n";
+
+        print "\t/* edges */\n";
+        for my $header (keys %deps) {
+                for my $dep (@{$deps{$header}}) {
+                        printf "\t%s -> %s;\n",
+                                mangle($header), mangle($dep->[1]);
+                }
+        }
+
+        print "}\n";
+}
diff --git a/scripts/kallsyms.c b/scripts/kallsyms.c
index ad2434b26970..92758120a767 100644
--- a/scripts/kallsyms.c
+++ b/scripts/kallsyms.c
@@ -130,18 +130,9 @@ static int read_symbol(FILE *in, struct sym_entry *s)
 static int symbol_valid(struct sym_entry *s)
 {
         /* Symbols which vary between passes.  Passes 1 and 2 must have
-         * identical symbol lists.  The kallsyms_* symbols below are only added
-         * after pass 1, they would be included in pass 2 when --all-symbols is
-         * specified so exclude them to get a stable symbol list.
+         * identical symbol lists.
          */
         static char *special_symbols[] = {
-                "kallsyms_addresses",
-                "kallsyms_num_syms",
-                "kallsyms_names",
-                "kallsyms_markers",
-                "kallsyms_token_table",
-                "kallsyms_token_index",
-
         /* Exclude linker generated symbols which vary between passes */
                 "_SDA_BASE_",           /* ppc */
                 "_SDA2_BASE_",          /* ppc */
@@ -173,7 +164,9 @@ static int symbol_valid(struct sym_entry *s)
         }
 
         /* Exclude symbols which vary between passes. */
-        if (strstr((char *)s->sym + offset, "_compiled."))
+        if (strstr((char *)s->sym + offset, "_compiled.") ||
+            strncmp((char*)s->sym + offset, "__compound_literal.", 19) == 0 ||
+            strncmp((char*)s->sym + offset, "__compound_literal$", 19) == 0)
                 return 0;
 
         for (i = 0; special_symbols[i]; i++)
@@ -550,8 +543,10 @@ int main(int argc, char **argv)
                 usage();
 
         read_map(stdin);
-        sort_symbols();
-        optimize_token_table();
+        if (table_cnt) {
+                sort_symbols();
+                optimize_token_table();
+        }
         write_src();
 
         return 0;
diff --git a/scripts/kconfig/lxdialog/check-lxdialog.sh b/scripts/kconfig/lxdialog/check-lxdialog.sh
index 5552154cbedb..fcef0f59d553 100644
--- a/scripts/kconfig/lxdialog/check-lxdialog.sh
+++ b/scripts/kconfig/lxdialog/check-lxdialog.sh
@@ -52,7 +52,7 @@ EOF
 }
 
 usage() {
-        printf "Usage: $0 [-check compiler options|-header|-library]\n"
+        printf "Usage: $0 [-check compiler options|-ccflags|-ldflags compiler options]\n"
 }
 
 if [ $# -eq 0 ]; then
diff --git a/scripts/kernel-doc b/scripts/kernel-doc
index d27aad78e1d8..8bb83a100edb 100755
--- a/scripts/kernel-doc
+++ b/scripts/kernel-doc
@@ -289,6 +289,8 @@ my %parameterdescs;
 my @parameterlist;
 my %sections;
 my @sectionlist;
+my $sectcheck;
+my $struct_actual;
 
 my $contents = "";
 my $section_default = "Description";    # default section
@@ -378,10 +380,12 @@ sub dump_section {
 #       print STDERR "parameter def '$1' = '$contents'\n";
         $name = $1;
         $parameterdescs{$name} = $contents;
+        $sectcheck = $sectcheck . $name . " ";
     } elsif ($name eq "@\.\.\.") {
 #       print STDERR "parameter def '...' = '$contents'\n";
         $name = "...";
         $parameterdescs{$name} = $contents;
+        $sectcheck = $sectcheck . $name . " ";
     } else {
 #       print STDERR "other section '$name' = '$contents'\n";
         if (defined($sections{$name}) && ($sections{$name} ne "")) {
@@ -1405,21 +1409,25 @@ sub dump_union($$) {
 sub dump_struct($$) {
     my $x = shift;
     my $file = shift;
+    my $nested;
 
     if ($x =~/(struct|union)\s+(\w+)\s*{(.*)}/) {
         $declaration_name = $2;
         my $members = $3;
 
         # ignore embedded structs or unions
-        $members =~ s/{.*}//g;
+        $members =~ s/({.*})//g;
+        $nested = $1;
 
         # ignore members marked private:
         $members =~ s/\/\*.*?private:.*?public:.*?\*\///gos;
         $members =~ s/\/\*.*?private:.*//gos;
         # strip comments:
         $members =~ s/\/\*.*?\*\///gos;
+        $nested =~ s/\/\*.*?\*\///gos;
 
         create_parameterlist($members, ';', $file);
+        check_sections($file, $declaration_name, "struct", $sectcheck, $struct_actual, $nested);
 
         output_declaration($declaration_name,
                            'struct',
@@ -1505,6 +1513,14 @@ sub dump_typedef($$) {
     }
 }
 
+sub save_struct_actual($) {
+    my $actual = shift;
+
+    # strip all spaces from the actual param so that it looks like one string item
+    $actual =~ s/\s*//g;
+    $struct_actual = $struct_actual . $actual . " ";
+}
+
 sub create_parameterlist($$$) {
     my $args = shift;
     my $splitter = shift;
@@ -1537,6 +1553,7 @@ sub create_parameterlist($$$) {
             $param = $1;
             $type = $arg;
             $type =~ s/([^\(]+\(\*?)\s*$param/$1/;
+            save_struct_actual($param);
             push_parameter($param, $type, $file);
         } elsif ($arg) {
             $arg =~ s/\s*:\s*/:/g;
@@ -1561,14 +1578,17 @@ sub create_parameterlist($$$) {
 
             foreach $param (@args) {
                 if ($param =~ m/^(\*+)\s*(.*)/) {
+                    save_struct_actual($2);
                     push_parameter($2, "$type $1", $file);
                 }
                 elsif ($param =~ m/(.*?):(\d+)/) {
                     if ($type ne "") { # skip unnamed bit-fields
+                        save_struct_actual($1);
                         push_parameter($1, "$type:$2", $file)
                     }
                 }
                 else {
+                    save_struct_actual($param);
                     push_parameter($param, $type, $file);
                 }
             }
@@ -1634,6 +1654,46 @@ sub push_parameter($$$) {
         $parametertypes{$param} = $type;
 }
 
+sub check_sections($$$$$$) {
+        my ($file, $decl_name, $decl_type, $sectcheck, $prmscheck, $nested) = @_;
+        my @sects = split ' ', $sectcheck;
+        my @prms = split ' ', $prmscheck;
+        my $err;
+        my ($px, $sx);
+        my $prm_clean;          # strip trailing "[array size]" and/or beginning "*"
+
+        foreach $sx (0 .. $#sects) {
+                $err = 1;
+                foreach $px (0 .. $#prms) {
+                        $prm_clean = $prms[$px];
+                        $prm_clean =~ s/\[.*\]//;
+                        $prm_clean =~ s/__attribute__\s*\(\([a-z,_\*\s\(\)]*\)\)//;
+                        ##$prm_clean =~ s/^\**//;
+                        if ($prm_clean eq $sects[$sx]) {
+                                $err = 0;
+                                last;
+                        }
+                }
+                if ($err) {
+                        if ($decl_type eq "function") {
+                                print STDERR "Warning(${file}:$.): " .
+                                        "Excess function parameter " .
+                                        "'$sects[$sx]' " .
+                                        "description in '$decl_name'\n";
+                                ++$warnings;
+                        } else {
+                                if ($nested !~ m/\Q$sects[$sx]\E/) {
+                                    print STDERR "Warning(${file}:$.): " .
+                                        "Excess struct/union/enum/typedef member " .
+                                        "'$sects[$sx]' " .
+                                        "description in '$decl_name'\n";
+                                    ++$warnings;
+                                }
+                        }
+                }
+        }
+}
+
 ##
 # takes a function prototype and the name of the current file being
 # processed and spits out all the details stored in the global
@@ -1699,6 +1759,9 @@ sub dump_function($$) {
         return;
     }
 
+        my $prms = join " ", @parameterlist;
+        check_sections($file, $declaration_name, "function", $sectcheck, $prms, "");
+
     output_declaration($declaration_name,
                        'function',
                        {'function' => $declaration_name,
@@ -1757,6 +1820,8 @@ sub reset_state {
     @parameterlist = ();
     %sections = ();
     @sectionlist = ();
+    $sectcheck = "";
+    $struct_actual = "";
     $prototype = "";
 
     $state = 0;
diff --git a/scripts/mkcompile_h b/scripts/mkcompile_h
index a8740df07b09..6a12dd9f1181 100755
--- a/scripts/mkcompile_h
+++ b/scripts/mkcompile_h
@@ -4,6 +4,8 @@ SMP=$3
 PREEMPT=$4
 CC=$5
 
+vecho() { [ "${quiet}" = "silent_" ] || echo "$@" ; }
+
 # If compile.h exists already and we don't own autoconf.h
 # (i.e. we're not the same user who did make *config), don't
 # modify compile.h
@@ -11,7 +13,7 @@ CC=$5
 # do "compiled by root"
 
 if [ -r $TARGET -a ! -O include/linux/autoconf.h ]; then
-  echo "  SKIPPED $TARGET"
+  vecho "  SKIPPED $TARGET"
   exit 0
 fi
 
@@ -89,7 +91,7 @@ if [ -r $TARGET ] && \
       cmp -s .tmpver.1 .tmpver.2; then
    rm -f .tmpcompile
 else
-   echo "  UPD     $TARGET"
+   vecho "  UPD     $TARGET"
    mv -f .tmpcompile $TARGET
 fi
 rm -f .tmpver.1 .tmpver.2
diff --git a/scripts/mkmakefile b/scripts/mkmakefile
index e65d8b33faa4..67d59c7a18dc 100644
--- a/scripts/mkmakefile
+++ b/scripts/mkmakefile
@@ -17,7 +17,9 @@ if test -e $2/Makefile && ! grep -q Automatically $2/Makefile
 then
         exit 0
 fi
-echo "  GEN     $2/Makefile"
+if [ "${quiet}" != "silent_" ]; then
+        echo "  GEN     $2/Makefile"
+fi
 
 cat << EOF > $2/Makefile
 # Automatically generated by $0: don't edit
diff --git a/scripts/mksysmap b/scripts/mksysmap
index 6e133a0bae7a..1db316a3712b 100644
--- a/scripts/mksysmap
+++ b/scripts/mksysmap
@@ -37,9 +37,6 @@
 
 # readprofile starts reading symbols when _stext is found, and
 # continue until it finds a symbol which is not either of 'T', 't',
-# 'W' or 'w'. __crc_ are 'A' and placed in the middle
-# so we just ignore them to let readprofile continue to work.
-# (At least sparc64 has __crc_ in the middle).
-
-$NM -n $1 | grep -v '\( [aNUw] \)\|\(__crc_\)\|\( \$[adt]\)' > $2
+# 'W' or 'w'.
 
+$NM -n $1 | grep -v '\( [aNUw] \)\|\( \$[adt]\)' > $2
diff --git a/scripts/package/Makefile b/scripts/package/Makefile
index 5e326078a4a2..8c6b7b09606a 100644
--- a/scripts/package/Makefile
+++ b/scripts/package/Makefile
@@ -1,10 +1,6 @@
 # Makefile for the different targets used to generate full packages of a kernel
 # It uses the generic clean infrastructure of kbuild
 
-# Ignore the following files/directories during tar operation
-TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS
-
-
 # RPM target
 # ---------------------------------------------------------------------------
 # The rpm target generates two rpm files:
@@ -47,7 +43,7 @@ rpm-pkg rpm: $(objtree)/kernel.spec FORCE
         set -e; \
         mv -f $(objtree)/.tmp_version $(objtree)/.version
 
-        $(RPM) --target $(UTS_MACHINE) -ta ../$(KERNELPATH).tar.gz
+        $(RPM) $(RPMOPTS) --target $(UTS_MACHINE) -ta ../$(KERNELPATH).tar.gz
         rm ../$(KERNELPATH).tar.gz
 
 clean-files := $(objtree)/kernel.spec
@@ -64,7 +60,8 @@ binrpm-pkg: $(objtree)/binkernel.spec FORCE
         set -e; \
         mv -f $(objtree)/.tmp_version $(objtree)/.version
 
-        $(RPM) --define "_builddir $(srctree)" --target $(UTS_MACHINE) -bb $<
+        $(RPM) $(RPMOPTS) --define "_builddir $(srctree)" --target \
+                $(UTS_MACHINE) -bb $<
 
 clean-files += $(objtree)/binkernel.spec
 
diff --git a/scripts/setlocalversion b/scripts/setlocalversion
index 72d233528ade..f6946cf99ce1 100755
--- a/scripts/setlocalversion
+++ b/scripts/setlocalversion
@@ -19,6 +19,11 @@ if head=`git rev-parse --verify --short HEAD 2>/dev/null`; then
                 fi
         fi
 
+        # Is this git on svn?
+        if git config --get svn-remote.svn.url >/dev/null; then
+                printf -- '-svn%s' "`git-svn find-rev $head`"
+        fi
+
         # Are there uncommitted changes?
         git update-index --refresh --unmerged > /dev/null
         if git diff-index --name-only HEAD | grep -v "^scripts/package" \
@@ -51,7 +56,7 @@ if hgid=`hg id 2>/dev/null`; then
 fi
 
 # Check for svn and a svn repo.
-if rev=`svn info 2>/dev/null | grep '^Revision'`; then
+if rev=`svn info 2>/dev/null | grep '^Last Changed Rev'`; then
         rev=`echo $rev | awk '{print $NF}'`
         changes=`svn status 2>/dev/null | grep '^[AMD]' | wc -l`
 
diff --git a/scripts/strip-symbols b/scripts/strip-symbols
new file mode 100644
index 000000000000..29ee8c1a014b
--- /dev/null
+++ b/scripts/strip-symbols
@@ -0,0 +1,22 @@
+<*>
+*.h
+__compound_literal[$.][0-9]*
+__crc_[a-zA-Z_]*
+__exitcall_[a-zA-Z_]*
+__func__[$.][0-9]*
+__FUNCTION__[$.][0-9]*
+gcc[0-9]_compiled[$.]
+__initcall_[a-zA-Z_]*
+__kcrctab_[a-zA-Z_]*
+__kstrtab_[a-zA-Z_]*
+__ksymtab_[a-zA-Z_]*
+__mod_[a-zA-Z_]*[0-9]
+__module_depends
+__param_[a-zA-Z_]*
+__pci_fixup_*PCI_ANY_IDPCI_ANY_ID*
+__pci_fixup_*PCI_ANY_IDPCI_DEVICE_ID_*
+__pci_fixup_*PCI_VENDOR_ID_*PCI_ANY_ID*
+__pci_fixup_*PCI_VENDOR_ID_*PCI_DEVICE_ID_*
+__PRETTY_FUNCTION__[$.][0-9]*
+__setup_[a-zA-Z_]*
+____versions
diff --git a/scripts/tags.sh b/scripts/tags.sh
new file mode 100755
index 000000000000..4e7547209852
--- /dev/null
+++ b/scripts/tags.sh
@@ -0,0 +1,160 @@
+#!/bin/sh
+# Generate tags or cscope files
+# Usage tags.sh <mode>
+#
+# mode may be any of: tags, TAGS, cscope
+#
+# Uses the following environment variables:
+# ARCH, SUBARCH, srctree, src, obj
+
+if [ "$KBUILD_VERBOSE" = "1" ]; then
+        set -x
+fi
+
+# This is a duplicate of RCS_FIND_IGNORE without escaped '()'
+ignore="( -name SCCS -o -name BitKeeper -o -name .svn -o \
+          -name CVS  -o -name .pc       -o -name .hg  -o \
+          -name .git )                                   \
+          -prune -o"
+
+# Do not use full path is we do not use O=.. builds
+if [ "${KBUILD_SRC}" = "" ]; then
+        tree=
+else
+        tree=${srctree}/
+fi
+
+# find sources in arch/$ARCH
+find_arch_sources()
+{
+        find ${tree}arch/$1 $ignore -name "$2" -print;
+}
+
+# find sources in arch/$1/include
+find_arch_include_sources()
+{
+        find ${tree}arch/$1/include $ignore -name "$2" -print;
+}
+
+# find sources in include/
+find_include_sources()
+{
+        find ${tree}include $ignore -name config -prune -o -name "$1" -print;
+}
+
+# find sources in rest of tree
+# we could benefit from a list of dirs to search in here
+find_other_sources()
+{
+        find ${tree}* $ignore \
+             \( -name include -o -name arch -o -name '.tmp_*' \) -prune -o \
+               -name "$1" -print;
+}
+
+find_sources()
+{
+        find_arch_sources $1 "$2"
+        find_include_sources "$2"
+        find_other_sources "$2"
+}
+
+all_sources()
+{
+        find_sources $SRCARCH '*.[chS]'
+        if [ ! -z "$archinclude" ]; then
+                find_arch_include_sources $archinclude '*.[chS]'
+        fi
+}
+
+all_kconfigs()
+{
+        find_sources $SRCARCH 'Kconfig*'
+}
+
+all_defconfigs()
+{
+        find_sources $SRCARCH "defconfig"
+}
+
+docscope()
+{
+        (echo \-k; echo \-q; all_sources) > cscope.files
+        cscope -b -f cscope.out
+}
+
+exuberant()
+{
+        all_sources > all
+        all_sources | xargs $1 -a                               \
+        -I __initdata,__exitdata,__acquires,__releases          \
+        -I __read_mostly,____cacheline_aligned                  \
+        -I ____cacheline_aligned_in_smp                         \
+        -I ____cacheline_internodealigned_in_smp                \
+        -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL                      \
+        --extra=+f --c-kinds=+px                                \
+        --regex-asm='/^ENTRY\(([^)]*)\).*/\1/'
+
+        all_kconfigs | xargs $1 -a                              \
+        --langdef=kconfig --language-force=kconfig              \
+        --regex-kconfig='/^[[:blank:]]*(menu|)config[[:blank:]]+([[:alnum:]_]+)/\2/'
+
+        all_kconfigs | xargs $1 -a                              \
+        --langdef=kconfig --language-force=kconfig              \
+        --regex-kconfig='/^[[:blank:]]*(menu|)config[[:blank:]]+([[:alnum:]_]+)/CONFIG_\2/'
+
+        all_defconfigs | xargs -r $1 -a                         \
+        --langdef=dotconfig --language-force=dotconfig          \
+        --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'
+
+}
+
+emacs()
+{
+        all_sources | xargs $1 -a
+
+        all_kconfigs | xargs $1 -a                              \
+        --regex='/^[ \t]*\(\(menu\)*config\)[ \t]+\([a-zA-Z0-9_]+\)/\3/'
+
+        all_kconfigs | xargs $1 -a                              \
+        --regex='/^[ \t]*\(\(menu\)*config\)[ \t]+\([a-zA-Z0-9_]+\)/CONFIG_\3/'
+
+        all_defconfigs | xargs -r $1 -a                         \
+        --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'
+}
+
+xtags()
+{
+        if $1 --version 2>&1 | grep -iq exuberant; then
+                exuberant $1
+        elif $1 --version 2>&1 | grep -iq emacs; then
+                emacs $1
+        else
+                all_sources | xargs $1 -a
+        fi
+}
+
+
+# Support um (which uses SUBARCH)
+if [ "${ARCH}" = "um" ]; then
+        if [ "$SUBARCH" = "i386" ]; then
+                archinclude=x86
+        elif [ "$SUBARCH" = "x86_64" ]; then
+                archinclude=x86
+        else
+                archinclude=${SUBARCH}
+        fi
+fi
+
+case "$1" in
+        "cscope")
+                docscope
+                ;;
+
+        "tags")
+                xtags ctags
+                ;;
+
+        "TAGS")
+                xtags etags
+                ;;
+esac