mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-11 12:28:41 +08:00
Kbuild updates for v4.20
- optimize kallsyms slightly - remove check for old CFLAGS usage - add some compiler flags unconditionally instead of evaluating $(call cc-option,...) - fix variable shadowing in host tools - refactor scripts/mkmakefile - refactor various makefiles -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAABAgAGBQJb1eyEAAoJED2LAQed4NsGUjwP/0/W0nLP+nKCJ0NpsSD151Ea Vrbm+RMxl8uPuQ0+Bh59rdO2yWR8v7jOX8CPbX1DqW0XwW4vTNRZm9j6A83rJzHv dPpinUObq6vXGJCYvMLoumhOkM1lRZie1AeBeLgKF0G0jprxUspGvakSyM/5SOo6 3gIhpPcczijC980KHIJbmwiGqRFVs3/zwqcKjQaRD3C6f4HdJL3i9Zr7kuZF0g1x dxCdN4Shv5x0igggp58z8646bbKlN7hItYaPq2csDop55/jWKzUkBkFkeaDjiUdB B6ysQfwkuTb6sbKXE6euYLUTyc6epx9v9pey0FpOx5tjXT+QmgK1ddLQEwdFH2+/ Fd5VR70h8uKTNvmqFJ+iebpR/aC71sUqYAzsoiTVZibR/F6+QAuhHJPZJDlSSwLC QH7j0fwJ3X5p9PYe3JBWyWzOd9BDvtV+HGE67Kx17iRNW0FDyKSvn7tezRVtqvHr KENrMT4n+lNQzB+c4lfjOE9ANpOf+PP4+ODhbrtvKItyb5QfF4F+5CDVif3wv3Kt 6dvh13hvR06gQCpbuxcFgD17mT1T/lVieuzOnWjtEh4HiMI1H0abYfkRWbQshrti u7TfYxwAyWKtisiPiT/1THYsW3ux7QmTSIo2iOznQxDlbmzENpQx+f22HsLaC0XU AUgvKGBaN0WOar2f2gyq =jM4E -----END PGP SIGNATURE----- Merge tag 'kbuild-v4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull Kbuild updates from Masahiro Yamada: - optimize kallsyms slightly - remove check for old CFLAGS usage - add some compiler flags unconditionally instead of evaluating $(call cc-option,...) - fix variable shadowing in host tools - refactor scripts/mkmakefile - refactor various makefiles * tag 'kbuild-v4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: modpost: Create macro to avoid variable shadowing ASN.1: Remove unnecessary shadowed local variable kbuild: use 'else ifeq' for checksrc to improve readability kbuild: remove unneeded link_multi_deps kbuild: add -Wno-unused-but-set-variable flag unconditionally kbuild: add -Wdeclaration-after-statement flag unconditionally kbuild: add -Wno-pointer-sign flag unconditionally modpost: remove leftover symbol prefix handling for module device table kbuild: simplify command line creation in scripts/mkmakefile kbuild: do not pass $(objtree) to scripts/mkmakefile kbuild: remove user ID check in scripts/mkmakefile kbuild: remove VERSION and PATCHLEVEL from $(objtree)/Makefile kbuild: add --include-dir flag only for out-of-tree build kbuild: remove dead code in cmd_files calculation in top Makefile kbuild: hide most of targets when running config or mixed targets kbuild: remove old check for CFLAGS use kbuild: prefix Makefile.dtbinst path with $(srctree) unconditionally kallsyms: remove left-over Blackfin code kallsyms: reduce size a little on 64-bit
This commit is contained in:
Linus Torvalds
commit
ac747c0715
31
Makefile
31
Makefile
@ -15,10 +15,9 @@ NAME = "People's Front"
|
||||
PHONY := _all
|
||||
_all:
|
||||
|
||||
# o Do not use make's built-in rules and variables
|
||||
# (this increases performance and avoids hard-to-debug behaviour);
|
||||
# o Look for make include files relative to root of kernel src
|
||||
MAKEFLAGS += -rR --include-dir=$(CURDIR)
|
||||
# Do not use make's built-in rules and variables
|
||||
# (this increases performance and avoids hard-to-debug behaviour)
|
||||
MAKEFLAGS += -rR
|
||||
|
||||
# Avoid funny character set dependencies
|
||||
unexport LC_ALL
|
||||
@ -136,6 +135,13 @@ KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \
|
||||
$(if $(KBUILD_OUTPUT),, \
|
||||
$(error failed to create output directory "$(saved-output)"))
|
||||
|
||||
# Look for make include files relative to root of kernel src
|
||||
#
|
||||
# This does not become effective immediately because MAKEFLAGS is re-parsed
|
||||
# once after the Makefile is read. It is OK since we are going to invoke
|
||||
# 'sub-make' below.
|
||||
MAKEFLAGS += --include-dir=$(CURDIR)
|
||||
|
||||
PHONY += $(MAKECMDGOALS) sub-make
|
||||
|
||||
$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
|
||||
@ -476,8 +482,7 @@ PHONY += outputmakefile
|
||||
outputmakefile:
|
||||
ifneq ($(KBUILD_SRC),)
|
||||
$(Q)ln -fsn $(srctree) source
|
||||
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
|
||||
$(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
|
||||
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree)
|
||||
endif
|
||||
|
||||
ifeq ($(cc-name),clang)
|
||||
@ -713,7 +718,7 @@ else
|
||||
|
||||
# These warnings generated too much noise in a regular build.
|
||||
# Use make W=1 to enable them (see scripts/Makefile.extrawarn)
|
||||
KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
|
||||
KBUILD_CFLAGS += -Wno-unused-but-set-variable
|
||||
endif
|
||||
|
||||
KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
|
||||
@ -794,10 +799,10 @@ endif
|
||||
NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
|
||||
|
||||
# warn about C99 declaration after statement
|
||||
KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
|
||||
KBUILD_CFLAGS += -Wdeclaration-after-statement
|
||||
|
||||
# disable pointer signed / unsigned warnings in gcc 4.0
|
||||
KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
|
||||
KBUILD_CFLAGS += -Wno-pointer-sign
|
||||
|
||||
# disable stringop warnings in gcc 8+
|
||||
KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
|
||||
@ -1647,9 +1652,6 @@ namespacecheck:
|
||||
export_report:
|
||||
$(PERL) $(srctree)/scripts/export_report.pl
|
||||
|
||||
endif #ifeq ($(config-targets),1)
|
||||
endif #ifeq ($(mixed-targets),1)
|
||||
|
||||
PHONY += checkstack kernelrelease kernelversion image_name
|
||||
|
||||
# UML needs a little special treatment here. It wants to use the host
|
||||
@ -1756,14 +1758,15 @@ cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
|
||||
$(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
|
||||
|
||||
# read all saved command lines
|
||||
|
||||
cmd_files := $(wildcard .*.cmd $(foreach f,$(sort $(targets)),$(dir $(f)).$(notdir $(f)).cmd))
|
||||
cmd_files := $(wildcard .*.cmd)
|
||||
|
||||
ifneq ($(cmd_files),)
|
||||
$(cmd_files): ; # Do not try to update included dependency files
|
||||
include $(cmd_files)
|
||||
endif
|
||||
|
||||
endif # ifeq ($(config-targets),1)
|
||||
endif # ifeq ($(mixed-targets),1)
|
||||
endif # skip-makefile
|
||||
|
||||
PHONY += FORCE
|
||||
|
||||
@ -37,7 +37,7 @@ extern const u8 kallsyms_names[] __weak;
|
||||
* Tell the compiler that the count isn't in the small data section if the arch
|
||||
* has one (eg: FRV).
|
||||
*/
|
||||
extern const unsigned long kallsyms_num_syms
|
||||
extern const unsigned int kallsyms_num_syms
|
||||
__attribute__((weak, section(".rodata")));
|
||||
|
||||
extern const unsigned long kallsyms_relative_base
|
||||
@ -46,7 +46,7 @@ __attribute__((weak, section(".rodata")));
|
||||
extern const u8 kallsyms_token_table[] __weak;
|
||||
extern const u16 kallsyms_token_index[] __weak;
|
||||
|
||||
extern const unsigned long kallsyms_markers[] __weak;
|
||||
extern const unsigned int kallsyms_markers[] __weak;
|
||||
|
||||
/*
|
||||
* Expand a compressed symbol data into the resulting uncompressed string,
|
||||
|
||||
@ -195,7 +195,7 @@ modbuiltin := -f $(srctree)/scripts/Makefile.modbuiltin obj
|
||||
# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.dtbinst obj=
|
||||
# Usage:
|
||||
# $(Q)$(MAKE) $(dtbinst)=dir
|
||||
dtbinst := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.dtbinst obj
|
||||
dtbinst := -f $(srctree)/scripts/Makefile.dtbinst obj
|
||||
|
||||
###
|
||||
# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=
|
||||
|
||||
@ -36,21 +36,11 @@ subdir-ccflags-y :=
|
||||
|
||||
include scripts/Kbuild.include
|
||||
|
||||
# For backward compatibility check that these variables do not change
|
||||
save-cflags := $(CFLAGS)
|
||||
|
||||
# The filename Kbuild has precedence over Makefile
|
||||
kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src))
|
||||
kbuild-file := $(if $(wildcard $(kbuild-dir)/Kbuild),$(kbuild-dir)/Kbuild,$(kbuild-dir)/Makefile)
|
||||
include $(kbuild-file)
|
||||
|
||||
# If the save-* variables changed error out
|
||||
ifeq ($(KBUILD_NOPEDANTIC),)
|
||||
ifneq ("$(save-cflags)","$(CFLAGS)")
|
||||
$(error CFLAGS was changed in "$(kbuild-file)". Fix it to use ccflags-y)
|
||||
endif
|
||||
endif
|
||||
|
||||
include scripts/Makefile.lib
|
||||
|
||||
# Do not include host rules unless needed
|
||||
@ -83,14 +73,12 @@ __build: $(if $(KBUILD_BUILTIN),$(builtin-target) $(lib-target) $(extra-y)) \
|
||||
@:
|
||||
|
||||
# Linus' kernel sanity checking tool
|
||||
ifneq ($(KBUILD_CHECKSRC),0)
|
||||
ifeq ($(KBUILD_CHECKSRC),2)
|
||||
quiet_cmd_force_checksrc = CHECK $<
|
||||
cmd_force_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ;
|
||||
else
|
||||
quiet_cmd_checksrc = CHECK $<
|
||||
cmd_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ;
|
||||
endif
|
||||
ifeq ($(KBUILD_CHECKSRC),1)
|
||||
quiet_cmd_checksrc = CHECK $<
|
||||
cmd_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ;
|
||||
else ifeq ($(KBUILD_CHECKSRC),2)
|
||||
quiet_cmd_force_checksrc = CHECK $<
|
||||
cmd_force_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ;
|
||||
endif
|
||||
|
||||
ifneq ($(KBUILD_ENABLE_EXTRA_GCC_CHECKS),)
|
||||
@ -495,28 +483,12 @@ targets += $(obj)/lib-ksyms.o
|
||||
|
||||
endif
|
||||
|
||||
#
|
||||
# Rule to link composite objects
|
||||
#
|
||||
# Composite objects are specified in kbuild makefile as follows:
|
||||
# <composite-object>-objs := <list of .o files>
|
||||
# or
|
||||
# <composite-object>-y := <list of .o files>
|
||||
# or
|
||||
# <composite-object>-m := <list of .o files>
|
||||
# The -m syntax only works if <composite object> is a module
|
||||
link_multi_deps = \
|
||||
$(filter $(addprefix $(obj)/, \
|
||||
$($(subst $(obj)/,,$(@:.o=-objs))) \
|
||||
$($(subst $(obj)/,,$(@:.o=-y))) \
|
||||
$($(subst $(obj)/,,$(@:.o=-m)))), $^)
|
||||
|
||||
quiet_cmd_link_multi-m = LD [M] $@
|
||||
cmd_link_multi-m = $(LD) $(ld_flags) -r -o $@ $(link_multi_deps) $(cmd_secanalysis)
|
||||
cmd_link_multi-m = $(LD) $(ld_flags) -r -o $@ $(filter %.o,$^) $(cmd_secanalysis)
|
||||
|
||||
$(multi-used-m): FORCE
|
||||
$(call if_changed,link_multi-m)
|
||||
@{ echo $(@:.o=.ko); echo $(link_multi_deps); \
|
||||
@{ echo $(@:.o=.ko); echo $(filter %.o,$^); \
|
||||
$(cmd_undef_syms); } > $(MODVERDIR)/$(@F:.o=.mod)
|
||||
$(call multi_depend, $(multi-used-m), .o, -objs -y -m)
|
||||
|
||||
|
||||
@ -413,7 +413,7 @@ static void tokenise(char *buffer, char *end)
|
||||
|
||||
/* Handle string tokens */
|
||||
if (isalpha(*p)) {
|
||||
const char **dir, *start = p;
|
||||
const char **dir;
|
||||
|
||||
/* Can be a directive, type name or element
|
||||
* name. Find the end of the name.
|
||||
|
||||
@ -48,8 +48,6 @@ static unsigned long long relative_base;
|
||||
static struct addr_range text_ranges[] = {
|
||||
{ "_stext", "_etext" },
|
||||
{ "_sinittext", "_einittext" },
|
||||
{ "_stext_l1", "_etext_l1" }, /* Blackfin on-chip L1 inst SRAM */
|
||||
{ "_stext_l2", "_etext_l2" }, /* Blackfin on-chip L2 SRAM */
|
||||
};
|
||||
#define text_range_text (&text_ranges[0])
|
||||
#define text_range_inittext (&text_ranges[1])
|
||||
@ -405,7 +403,7 @@ static void write_src(void)
|
||||
}
|
||||
|
||||
output_label("kallsyms_num_syms");
|
||||
printf("\tPTR\t%u\n", table_cnt);
|
||||
printf("\t.long\t%u\n", table_cnt);
|
||||
printf("\n");
|
||||
|
||||
/* table of offset markers, that give the offset in the compressed stream
|
||||
@ -434,7 +432,7 @@ static void write_src(void)
|
||||
|
||||
output_label("kallsyms_markers");
|
||||
for (i = 0; i < ((table_cnt + 255) >> 8); i++)
|
||||
printf("\tPTR\t%d\n", markers[i]);
|
||||
printf("\t.long\t%u\n", markers[i]);
|
||||
printf("\n");
|
||||
|
||||
free(markers);
|
||||
|
||||
@ -6,31 +6,20 @@
|
||||
|
||||
# Usage
|
||||
# $1 - Kernel src directory
|
||||
# $2 - Output directory
|
||||
# $3 - version
|
||||
# $4 - patchlevel
|
||||
|
||||
|
||||
test ! -r $2/Makefile -o -O $2/Makefile || exit 0
|
||||
# Only overwrite automatically generated Makefiles
|
||||
# (so we do not overwrite kernel Makefile)
|
||||
if test -e $2/Makefile && ! grep -q Automatically $2/Makefile
|
||||
if test -e Makefile && ! grep -q Automatically Makefile
|
||||
then
|
||||
exit 0
|
||||
fi
|
||||
if [ "${quiet}" != "silent_" ]; then
|
||||
echo " GEN $2/Makefile"
|
||||
echo " GEN Makefile"
|
||||
fi
|
||||
|
||||
cat << EOF > $2/Makefile
|
||||
cat << EOF > Makefile
|
||||
# Automatically generated by $0: don't edit
|
||||
|
||||
VERSION = $3
|
||||
PATCHLEVEL = $4
|
||||
|
||||
lastword = \$(word \$(words \$(1)),\$(1))
|
||||
makedir := \$(dir \$(call lastword,\$(MAKEFILE_LIST)))
|
||||
|
||||
ifeq ("\$(origin V)", "command line")
|
||||
VERBOSE := \$(V)
|
||||
endif
|
||||
@ -38,15 +27,12 @@ ifneq (\$(VERBOSE),1)
|
||||
Q := @
|
||||
endif
|
||||
|
||||
MAKEARGS := -C $1
|
||||
MAKEARGS += O=\$(if \$(patsubst /%,,\$(makedir)),\$(CURDIR)/)\$(patsubst %/,%,\$(makedir))
|
||||
|
||||
MAKEFLAGS += --no-print-directory
|
||||
|
||||
.PHONY: __sub-make \$(MAKECMDGOALS)
|
||||
|
||||
__sub-make:
|
||||
\$(Q)\$(MAKE) \$(MAKEARGS) \$(MAKECMDGOALS)
|
||||
\$(Q)\$(MAKE) -C $1 O=\$(CURDIR) \$(MAKECMDGOALS)
|
||||
|
||||
\$(filter-out __sub-make, \$(MAKECMDGOALS)): __sub-make
|
||||
@:
|
||||
|
||||
@ -95,12 +95,20 @@ extern struct devtable *__start___devtable[], *__stop___devtable[];
|
||||
*/
|
||||
#define DEF_FIELD(m, devid, f) \
|
||||
typeof(((struct devid *)0)->f) f = TO_NATIVE(*(typeof(f) *)((m) + OFF_##devid##_##f))
|
||||
|
||||
/* Define a variable v that holds the address of field f of struct devid
|
||||
* based at address m. Due to the way typeof works, for a field of type
|
||||
* T[N] the variable has type T(*)[N], _not_ T*.
|
||||
*/
|
||||
#define DEF_FIELD_ADDR_VAR(m, devid, f, v) \
|
||||
typeof(((struct devid *)0)->f) *v = ((m) + OFF_##devid##_##f)
|
||||
|
||||
/* Define a variable f that holds the address of field f of struct devid
|
||||
* based at address m. Due to the way typeof works, for a field of type
|
||||
* T[N] the variable has type T(*)[N], _not_ T*.
|
||||
*/
|
||||
#define DEF_FIELD_ADDR(m, devid, f) \
|
||||
typeof(((struct devid *)0)->f) *f = ((m) + OFF_##devid##_##f)
|
||||
DEF_FIELD_ADDR_VAR(m, devid, f, f)
|
||||
|
||||
/* Add a table entry. We test function type matches while we're here. */
|
||||
#define ADD_TO_DEVTABLE(device_id, type, function) \
|
||||
@ -644,7 +652,7 @@ static void do_pnp_card_entries(void *symval, unsigned long size,
|
||||
|
||||
for (i = 0; i < count; i++) {
|
||||
unsigned int j;
|
||||
DEF_FIELD_ADDR(symval + i*id_size, pnp_card_device_id, devs);
|
||||
DEF_FIELD_ADDR(symval + i * id_size, pnp_card_device_id, devs);
|
||||
|
||||
for (j = 0; j < PNP_MAX_DEVICES; j++) {
|
||||
const char *id = (char *)(*devs)[j].id;
|
||||
@ -656,10 +664,13 @@ static void do_pnp_card_entries(void *symval, unsigned long size,
|
||||
|
||||
/* find duplicate, already added value */
|
||||
for (i2 = 0; i2 < i && !dup; i2++) {
|
||||
DEF_FIELD_ADDR(symval + i2*id_size, pnp_card_device_id, devs);
|
||||
DEF_FIELD_ADDR_VAR(symval + i2 * id_size,
|
||||
pnp_card_device_id,
|
||||
devs, devs_dup);
|
||||
|
||||
for (j2 = 0; j2 < PNP_MAX_DEVICES; j2++) {
|
||||
const char *id2 = (char *)(*devs)[j2].id;
|
||||
const char *id2 =
|
||||
(char *)(*devs_dup)[j2].id;
|
||||
|
||||
if (!id2[0])
|
||||
break;
|
||||
@ -1415,11 +1426,10 @@ void handle_moddevtable(struct module *mod, struct elf_info *info,
|
||||
if (ELF_ST_TYPE(sym->st_info) != STT_OBJECT)
|
||||
return;
|
||||
|
||||
/* All our symbols are of form <prefix>__mod_<name>__<identifier>_device_table. */
|
||||
name = strstr(symname, "__mod_");
|
||||
if (!name)
|
||||
/* All our symbols are of form __mod_<name>__<identifier>_device_table. */
|
||||
if (strncmp(symname, "__mod_", strlen("__mod_")))
|
||||
return;
|
||||
name += strlen("__mod_");
|
||||
name = symname + strlen("__mod_");
|
||||
namelen = strlen(name);
|
||||
if (namelen < strlen("_device_table"))
|
||||
return;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user