提交 d56dc0b6 编写于 作者: L Linus Torvalds
......@@ -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 ?=
......
......@@ -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
......
......@@ -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 "
......
......@@ -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;
......
......@@ -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);
......
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