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

* git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild:
  kbuild: fix depmod comment
  kbuild: Add new Kbuild variable KBUILD_EXTRA_SYMBOLS
  kbuild: support loading extra symbols in modpost
  Add option to enable -Wframe-larger-than= on gcc 4.4
  kbuild: add kconfig symbols to tags output
  kbuild: fix some minor typoes
  kbuild: error out on missing MODULE_LICENSE

5 files changed, 44 insertions, 11 deletions

diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index 67fb4530a6f..277cfe0b710 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -27,12 +27,12 @@ ccflags-y  :=
 cppflags-y :=
 ldflags-y  :=
 
-# Read .config if it exist, otherwise ignore
+# Read auto.conf if it exists, otherwise ignore
 -include include/config/auto.conf
 
 include scripts/Kbuild.include
 
-# For backward compatibility check that these variables does not change
+# For backward compatibility check that these variables do not change
 save-cflags := $(CFLAGS)
 
 # The filename Kbuild has precedence over Makefile
@@ -55,7 +55,7 @@ hostprogs-y += $(host-progs)
 endif
 endif
 
-# Do not include host rules unles needed
+# Do not include host rules unless needed
 ifneq ($(hostprogs-y)$(hostprogs-m),)
 include scripts/Makefile.host
 endif
diff --git a/scripts/Makefile.clean b/scripts/Makefile.clean
index 2c647107c9c..6f89fbb5625 100644
--- a/scripts/Makefile.clean
+++ b/scripts/Makefile.clean
@@ -37,7 +37,7 @@ subdir-ymn      := $(sort $(subdir-ym) $(subdir-n) $(subdir-))
 
 subdir-ymn	:= $(addprefix $(obj)/,$(subdir-ymn))
 
-# build a list of files to remove, usually releative to the current
+# build a list of files to remove, usually relative to the current
 # directory
 
 __clean-files	:= $(extra-y) $(always)                  \
diff --git a/scripts/Makefile.host b/scripts/Makefile.host
index 6943a7a5bb9..1ac414fd503 100644
--- a/scripts/Makefile.host
+++ b/scripts/Makefile.host
@@ -3,9 +3,9 @@
 # Binaries are used during the compilation of the kernel, for example
 # to preprocess a data file.
 #
-# Both C and C++ is supported, but preferred language is C for such utilities.
+# Both C and C++ are supported, but preferred language is C for such utilities.
 #
-# Samle syntax (see Documentation/kbuild/makefile.txt for reference)
+# Sample syntax (see Documentation/kbuild/makefiles.txt for reference)
 # hostprogs-y := bin2hex
 # Will compile bin2hex.c and create an executable named bin2hex
 #
@@ -23,10 +23,10 @@
 # hostprogs-y := conf
 # conf-objs  := conf.o libkconfig.so
 # libkconfig-objs := expr.o type.o
-# Will create a shared library named libkconfig.so that consist of
-# expr.o and type.o (they are both compiled as C code and the object file
+# Will create a shared library named libkconfig.so that consists of
+# expr.o and type.o (they are both compiled as C code and the object files
 # are made as position independent code).
-# conf.c is compiled as a c program, and conf.o is linked together with
+# conf.c is compiled as a C program, and conf.o is linked together with
 # libkconfig.so as the executable conf.
 # Note: Shared libraries consisting of C++ files are not supported
 
@@ -61,7 +61,7 @@ host-cobjs	:= $(filter-out %.so,$(host-cobjs))
 host-cshobjs	:= $(sort $(foreach m,$(host-cshlib),$($(m:.so=-objs))))
 
 # output directory for programs/.o files
-# hostprogs-y := tools/build may have been specified. Retreive directory
+# hostprogs-y := tools/build may have been specified. Retrieve directory
 host-objdirs := $(foreach f,$(__hostprogs), $(if $(dir $(f)),$(dir $(f))))
 # directory of .o files from prog-objs notation
 host-objdirs += $(foreach f,$(host-cmulti),                  \
diff --git a/scripts/Makefile.modpost b/scripts/Makefile.modpost
index 2d20640854b..24b3c8fe6bc 100644
--- a/scripts/Makefile.modpost
+++ b/scripts/Makefile.modpost
@@ -42,6 +42,13 @@ _modpost: __modpost
 
 include include/config/auto.conf
 include scripts/Kbuild.include
+
+ifneq ($(KBUILD_EXTMOD),)
+# Include the module's Makefile to find KBUILD_EXTRA_SYMBOLS
+include $(if $(wildcard $(KBUILD_EXTMOD)/Kbuild), \
+             $(KBUILD_EXTMOD)/Kbuild, $(KBUILD_EXTMOD)/Makefile)
+endif
+
 include scripts/Makefile.lib
 
 kernelsymfile := $(objtree)/Module.symvers
@@ -69,6 +76,7 @@ modpost = scripts/mod/modpost                    \
  $(if $(CONFIG_MODULE_SRCVERSION_ALL),-a,)       \
  $(if $(KBUILD_EXTMOD),-i,-o) $(kernelsymfile)   \
  $(if $(KBUILD_EXTMOD),-I $(modulesymfile))      \
+ $(if $(iKBUILD_EXTRA_SYMBOLS), $(patsubst %, -e %,$(EXTRA_SYMBOLS))) \
  $(if $(KBUILD_EXTMOD),-o $(modulesymfile))      \
  $(if $(CONFIG_DEBUG_SECTION_MISMATCH),,-S)      \
  $(if $(CONFIG_MARKERS),-K $(kernelmarkersfile)) \
diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 110cf243fa4..f8b42ab0724 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -1552,6 +1552,10 @@ static void read_symbols(char *modname)
 	}
 
 	license = get_modinfo(info.modinfo, info.modinfo_len, "license");
+	if (!license && !is_vmlinux(modname))
+		fatal("modpost: missing MODULE_LICENSE() in %s\n"
+		      "see include/linux/module.h for "
+		      "more information\n", modname);
 	while (license) {
 		if (license_is_gpl_compatible(license))
 			mod->gpl_compatible = 1;
@@ -2015,6 +2019,11 @@ static void write_markers(const char *fname)
 	write_if_changed(&buf, fname);
 }
 
+struct ext_sym_list {
+	struct ext_sym_list *next;
+	const char *file;
+};
+
 int main(int argc, char **argv)
 {
 	struct module *mod;
@@ -2025,8 +2034,10 @@ int main(int argc, char **argv)
 	char *markers_write = NULL;
 	int opt;
 	int err;
+	struct ext_sym_list *extsym_iter;
+	struct ext_sym_list *extsym_start = NULL;
 
-	while ((opt = getopt(argc, argv, "i:I:cmsSo:awM:K:")) != -1) {
+	while ((opt = getopt(argc, argv, "i:I:e:cmsSo:awM:K:")) != -1) {
 		switch (opt) {
 		case 'i':
 			kernel_read = optarg;
@@ -2038,6 +2049,14 @@ int main(int argc, char **argv)
 		case 'c':
 			cross_build = 1;
 			break;
+		case 'e':
+			external_module = 1;
+			extsym_iter =
+			   NOFAIL(malloc(sizeof(*extsym_iter)));
+			extsym_iter->next = extsym_start;
+			extsym_iter->file = optarg;
+			extsym_start = extsym_iter;
+			break;
 		case 'm':
 			modversions = 1;
 			break;
@@ -2071,6 +2090,12 @@ int main(int argc, char **argv)
 		read_dump(kernel_read, 1);
 	if (module_read)
 		read_dump(module_read, 0);
+	while (extsym_start) {
+		read_dump(extsym_start->file, 0);
+		extsym_iter = extsym_start->next;
+		free(extsym_start);
+		extsym_start = extsym_iter;
+	}
 
 	while (optind < argc)
 		read_symbols(argv[optind++]);