[PATCH 5.4 114/152] kbuild: move headers_check rule to usr/include/Makefile

Greg Kroah-Hartman
2020-03-03T17:57:06Z

From: Masahiro Yamada <yamada.masahiro@socionext.com>

commit 7ecaf069da52e472d393f03e79d721aabd724166 upstream.

Currently, some sanity checks for uapi headers are done by
scripts/headers_check.pl, which is wired up to the 'headers_check'
target in the top Makefile.

It is true compiling headers has better test coverage, but there
are still several headers excluded from the compile test. I like
to keep headers_check.pl for a while, but we can delete a lot of
code by moving the build rule to usr/include/Makefile.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
Makefile | 11 +++--------
lib/Kconfig.debug | 11 -----------
scripts/Makefile.headersinst | 18 ------------------
usr/include/Makefile | 9 ++++++---
4 files changed, 9 insertions(+), 40 deletions(-)

--- a/Makefile
+++ b/Makefile
@@ -1195,19 +1195,15 @@ headers: $(version_h) scripts_unifdef ua
$(Q)$(MAKE) $(hdr-inst)=include/uapi
$(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi

+# Deprecated. It is no-op now.
PHONY += headers_check
-headers_check: headers
- $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1
- $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi HDRCHECK=1
+headers_check:
+ @:

ifdef CONFIG_HEADERS_INSTALL
prepare: headers
endif

-ifdef CONFIG_HEADERS_CHECK
-all: headers_check
-endif
-
PHONY += scripts_unifdef
scripts_unifdef: scripts_basic
$(Q)$(MAKE) $(build)=scripts scripts/unifdef
@@ -1475,7 +1471,6 @@ help:
@echo ' versioncheck - Sanity check on version.h usage'
@echo ' includecheck - Check for duplicate included header files'
@echo ' export_report - List the usages of all exported symbols'
- @echo ' headers_check - Sanity check on exported headers'
@echo ' headerdep - Detect inclusion cycles in headers'
@echo ' coccicheck - Check with Coccinelle'
@echo ''
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -299,17 +299,6 @@ config HEADERS_INSTALL
user-space program samples. It is also needed by some features such
as uapi header sanity checks.

-config HEADERS_CHECK
- bool "Run sanity checks on uapi headers when building 'all'"
- depends on HEADERS_INSTALL
- help
- This option will run basic sanity checks on uapi headers when
- building the 'all' target, for example, ensure that they do not
- attempt to include files which were not exported, etc.
-
- If you're making modifications to header files which are
- relevant for userspace, say 'Y'.
-
config OPTIMIZE_INLINING
def_bool y
help
--- a/scripts/Makefile.headersinst
+++ b/scripts/Makefile.headersinst
@@ -56,9 +56,6 @@ new-dirs := $(filter-out $(existing
$(if $(new-dirs), $(shell mkdir -p $(new-dirs)))

# Rules
-
-ifndef HDRCHECK
-
quiet_cmd_install = HDRINST $@
cmd_install = $(CONFIG_SHELL) $(srctree)/scripts/headers_install.sh $< $@

@@ -81,21 +78,6 @@ existing-headers := $(filter $(old-heade

-include $(foreach f,$(existing-headers),$(dir $(f)).$(notdir $(f)).cmd)

-else
-
-quiet_cmd_check = HDRCHK $<
- cmd_check = $(PERL) $(srctree)/scripts/headers_check.pl $(dst) $(SRCARCH) $<; touch $@
-
-check-files := $(addsuffix .chk, $(all-headers))
-
-$(check-files): $(dst)/%.chk : $(dst)/% $(srctree)/scripts/headers_check.pl
- $(call cmd,check)
-
-__headers: $(check-files)
- @:
-
-endif
-
PHONY += FORCE
FORCE:

--- a/usr/include/Makefile
+++ b/usr/include/Makefile
@@ -99,11 +99,14 @@ endif
# asm-generic/*.h is used by asm/*.h, and should not be included directly
header-test- += asm-generic/%

-extra-y := $(patsubst %.h,%.hdrtest, $(filter-out $(header-test-), \
- $(patsubst $(obj)/%,%, $(shell find $(obj) -name '*.h'))))
+extra-y := $(patsubst $(obj)/%.h,%.hdrtest, $(shell find $(obj) -name '*.h'))

quiet_cmd_hdrtest = HDRTEST $<
- cmd_hdrtest = $(CC) $(c_flags) -S -o /dev/null -x c /dev/null -include $<; touch $@
+ cmd_hdrtest = \
+ $(CC) $(c_flags) -S -o /dev/null -x c /dev/null \
+ $(if $(filter-out $(header-test-), $*.h), -include $<); \
+ $(PERL) $(srctree)/scripts/headers_check.pl $(obj) $(SRCARCH) $<; \
+ touch $@

$(obj)/%.hdrtest: $(obj)/%.h FORCE
$(call if_changed_dep,hdrtest)