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Commit d56dc0b6 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

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

* git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-linus:
  kbuild: soften modpost checks when doing cross builds
parents 266c2e0a 4ce6efed

Makefile

+1 −1
Original line number Diff line number Diff line
@@ -189,7 +189,7 @@ SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \ 
# Alternatively CROSS_COMPILE can be set in the environment.

# Default value for CROSS_COMPILE is not to prefix executables

# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile



export KBUILD_BUILDHOST := $(SUBARCH)

ARCH		?= $(SUBARCH)

CROSS_COMPILE	?=

scripts/Makefile.modpost

+5 −1
Original line number Diff line number Diff line
@@ -58,6 +58,9 @@ modules := $(patsubst %.o,%.ko, $(wildcard $(__modules:.ko=.o))) 
# Stop after building .o files if NOFINAL is set. Makes compile tests quicker

_modpost: $(if $(KBUILD_MODPOST_NOFINAL), $(modules:.ko:.o),$(modules))



ifneq ($(KBUILD_BUILDHOST),$(ARCH))

        cross_build := 1

endif



# Step 2), invoke modpost

#  Includes step 3,4
@@ -70,7 +73,8 @@ modpost = scripts/mod/modpost \ 
 $(if $(CONFIG_DEBUG_SECTION_MISMATCH),,-S)      \

 $(if $(CONFIG_MARKERS),-K $(kernelmarkersfile)) \

 $(if $(CONFIG_MARKERS),-M $(markersfile))	 \

 $(if $(KBUILD_EXTMOD)$(KBUILD_MODPOST_WARN),-w)

 $(if $(KBUILD_EXTMOD)$(KBUILD_MODPOST_WARN),-w) \

 $(if $(cross_build),-c)



quiet_cmd_modpost = MODPOST $(words $(filter-out vmlinux FORCE, $^)) modules

      cmd_modpost = $(modpost) -s

scripts/mod/file2alias.c

+4 −0
Original line number Diff line number Diff line
@@ -51,11 +51,13 @@ do { \ 
                sprintf(str + strlen(str), "*");                \

} while(0)



unsigned int cross_build = 0;

/**

 * Check that sizeof(device_id type) are consistent with size of section

 * in .o file. If in-consistent then userspace and kernel does not agree

 * on actual size which is a bug.

 * Also verify that the final entry in the table is all zeros.

 * Ignore both checks if build host differ from target host and size differs.

 **/

static void device_id_check(const char *modname, const char *device_id,

			    unsigned long size, unsigned long id_size,
@@ -64,6 +66,8 @@ static void device_id_check(const char *modname, const char *device_id, 
	int i;



	if (size % id_size || size < id_size) {

		if (cross_build != 0)

			return;

		fatal("%s: sizeof(struct %s_device_id)=%lu is not a modulo "

		      "of the size of section __mod_%s_device_table=%lu.\n"

		      "Fix definition of struct %s_device_id "

scripts/mod/modpost.c

+4 −1
Original line number Diff line number Diff line
@@ -2026,7 +2026,7 @@ int main(int argc, char **argv) 
	int opt;

	int err;



	while ((opt = getopt(argc, argv, "i:I:msSo:awM:K:")) != -1) {

	while ((opt = getopt(argc, argv, "i:I:cmsSo:awM:K:")) != -1) {

		switch (opt) {

		case 'i':

			kernel_read = optarg;
@@ -2035,6 +2035,9 @@ int main(int argc, char **argv) 
			module_read = optarg;

			external_module = 1;

			break;

		case 'c':

			cross_build = 1;

			break;

		case 'm':

			modversions = 1;

			break;

scripts/mod/modpost.h

+1 −0
Original line number Diff line number Diff line
@@ -135,6 +135,7 @@ struct elf_info { 
};



/* file2alias.c */

extern unsigned int cross_build;

void handle_moddevtable(struct module *mod, struct elf_info *info,

			Elf_Sym *sym, const char *symname);

void add_moddevtable(struct buffer *buf, struct module *mod);