[PATCH 2/3] kbuild: rebuild modules when module linker scripts are updated
From: Masahiro Yamada <hidden>
Date: 2019-08-14 16:09:52
Also in:
linux-doc, linux-kbuild, linux-riscv, linuxppc-dev, lkml
Subsystem:
arm port, arm64 port (aarch64 architecture), documentation, kernel build + files below scripts/ (unless maintained elsewhere), linux for powerpc (32-bit and 64-bit), m68k architecture, parisc architecture, risc-v architecture, the rest · Maintainers:
Russell King, Catalin Marinas, Will Deacon, Jonathan Corbet, Nathan Chancellor, Nicolas Schier, Madhavan Srinivasan, Geert Uytterhoeven, "James E.J. Bottomley", Helge Deller, Paul Walmsley, Palmer Dabbelt, Albert Ou, Linus Torvalds
Currently, the timestamp of module linker scripts are not checked. Add them to the dependency of modules so they are correctly rebuilt. Signed-off-by: Masahiro Yamada <redacted> --- Documentation/kbuild/makefiles.rst | 5 +++++ Makefile | 3 ++- arch/arm/Makefile | 2 +- arch/arm64/Makefile | 2 +- arch/ia64/Makefile | 2 +- arch/m68k/Makefile | 2 +- arch/parisc/Makefile | 2 +- arch/powerpc/Makefile | 2 +- arch/riscv/Makefile | 2 +- scripts/Makefile.modpost | 5 +++-- 10 files changed, 17 insertions(+), 10 deletions(-)
diff --git a/Documentation/kbuild/makefiles.rst b/Documentation/kbuild/makefiles.rst
index d3448d2c8017..36ba92e199d2 100644
--- a/Documentation/kbuild/makefiles.rst
+++ b/Documentation/kbuild/makefiles.rst@@ -999,6 +999,11 @@ When kbuild executes, the following steps are followed (roughly): The linker script with full path. Assigned by the top-level Makefile. + KBUILD_LDS_MODULE + + The module linker script with full path. Assigned by the top-level + Makefile and additionally by the arch Makefile. + KBUILD_VMLINUX_OBJS All object files for vmlinux. They are linked to vmlinux in the same
diff --git a/Makefile b/Makefile
index 164ca615e2f6..af808837a1f2 100644
--- a/Makefile
+++ b/Makefile@@ -485,7 +485,8 @@ KBUILD_AFLAGS_KERNEL := KBUILD_CFLAGS_KERNEL := KBUILD_AFLAGS_MODULE := -DMODULE KBUILD_CFLAGS_MODULE := -DMODULE -KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds +KBUILD_LDFLAGS_MODULE := +export KBUILD_LDS_MODULE := $(srctree)/scripts/module-common.lds KBUILD_LDFLAGS := GCC_PLUGINS_CFLAGS := CLANG_FLAGS :=
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index c3624ca6c0bc..fbe50eec8f34 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile@@ -17,7 +17,7 @@ KBUILD_LDFLAGS_MODULE += --be8 endif ifeq ($(CONFIG_ARM_MODULE_PLTS),y) -KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/arm/kernel/module.lds +KBUILD_LDS_MODULE += $(srctree)/arch/arm/kernel/module.lds endif GZFLAGS :=-9
diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile
index 61de992bbea3..d4ed1869e536 100644
--- a/arch/arm64/Makefile
+++ b/arch/arm64/Makefile@@ -101,7 +101,7 @@ endif CHECKFLAGS += -D__aarch64__ ifeq ($(CONFIG_ARM64_MODULE_PLTS),y) -KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/arm64/kernel/module.lds +KBUILD_LDS_MODULE += $(srctree)/arch/arm64/kernel/module.lds endif # Default value
diff --git a/arch/ia64/Makefile b/arch/ia64/Makefile
index 171290f9f1de..5c3bcaee5980 100644
--- a/arch/ia64/Makefile
+++ b/arch/ia64/Makefile@@ -20,7 +20,7 @@ CHECKFLAGS += -D__ia64=1 -D__ia64__=1 -D_LP64 -D__LP64__ OBJCOPYFLAGS := --strip-all LDFLAGS_vmlinux := -static -KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/ia64/module.lds +KBUILD_LDS_MODULE += $(srctree)/arch/ia64/module.lds KBUILD_AFLAGS_KERNEL := -mconstant-gp EXTRA :=
diff --git a/arch/m68k/Makefile b/arch/m68k/Makefile
index 482513b9af2c..5d9288384096 100644
--- a/arch/m68k/Makefile
+++ b/arch/m68k/Makefile@@ -73,7 +73,7 @@ KBUILD_AFLAGS += -D__uClinux__ endif KBUILD_LDFLAGS := -m m68kelf -KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/m68k/kernel/module.lds +KBUILD_LDS_MODULE += $(srctree)/arch/m68k/kernel/module.lds ifdef CONFIG_SUN3 LDFLAGS_vmlinux = -N
diff --git a/arch/parisc/Makefile b/arch/parisc/Makefile
index 3b77d729057f..36b834f1c933 100644
--- a/arch/parisc/Makefile
+++ b/arch/parisc/Makefile@@ -60,7 +60,7 @@ KBUILD_CFLAGS += -DCC_USING_PATCHABLE_FUNCTION_ENTRY=1 \ -DFTRACE_PATCHABLE_FUNCTION_SIZE=$(NOP_COUNT) CC_FLAGS_FTRACE := -fpatchable-function-entry=$(NOP_COUNT),$(shell echo $$(($(NOP_COUNT)-1))) -KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/parisc/kernel/module.lds +KBUILD_LDS_MODULE += $(srctree)/arch/parisc/kernel/module.lds endif OBJCOPY_FLAGS =-O binary -R .note -R .comment -S
diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
index c345b79414a9..b2227855de20 100644
--- a/arch/powerpc/Makefile
+++ b/arch/powerpc/Makefile@@ -67,7 +67,7 @@ UTS_MACHINE := $(subst $(space),,$(machine-y)) ifdef CONFIG_PPC32 KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o else -KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/powerpc/kernel/module.lds +KBUILD_LDS_MODULE += $(srctree)/arch/powerpc/kernel/module.lds ifeq ($(call ld-ifversion, -ge, 225000000, y),y) # Have the linker provide sfpr if possible. # There is a corresponding test in arch/powerpc/lib/Makefile
diff --git a/arch/riscv/Makefile b/arch/riscv/Makefile
index 7a117be8297c..426d989125a8 100644
--- a/arch/riscv/Makefile
+++ b/arch/riscv/Makefile@@ -52,7 +52,7 @@ ifeq ($(CONFIG_CMODEL_MEDANY),y) KBUILD_CFLAGS += -mcmodel=medany endif ifeq ($(CONFIG_MODULE_SECTIONS),y) - KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/riscv/kernel/module.lds + KBUILD_LDS_MODULE += $(srctree)/arch/riscv/kernel/module.lds endif KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-relax)
diff --git a/scripts/Makefile.modpost b/scripts/Makefile.modpost
index bf15818f6947..905db30d6622 100644
--- a/scripts/Makefile.modpost
+++ b/scripts/Makefile.modpost@@ -126,10 +126,11 @@ quiet_cmd_ld_ko_o = LD [M] $@ cmd_ld_ko_o = \ $(LD) -r $(KBUILD_LDFLAGS) \ $(KBUILD_LDFLAGS_MODULE) $(LDFLAGS_MODULE) \ - -o $@ $(real-prereqs) ; \ + $(addprefix -T , $(KBUILD_LDS_MODULE)) \ + -o $@ $(filter %.o, $^); \ $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) -$(modules): %.ko :%.o %.mod.o FORCE +$(modules): %.ko :%.o %.mod.o $(KBUILD_LDS_MODULE) FORCE +$(call if_changed,ld_ko_o) targets += $(modules)
--
2.17.1
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