From 71504277ae5537007a99864e53a3b5ceb211a660 Mon Sep 17 00:00:00 2001 From: Arvind Sankar Date: Sun, 7 Jun 2020 17:03:12 -0400 Subject: [PATCH] Cleanup linux module kbuild files The linux module can be built either as an external module, or compiled into the kernel, using copy-builtin. The source and build directories are slightly different between the two cases, and currently, compiling into the kernel still refers to some files from the configured ZFS source tree, instead of the copies inside the kernel source tree. There is also duplication between copy-builtin, which creates a Kbuild file to build ZFS inside the kernel tree, and the top-level module/Makefile.in. Fix this by moving the list of modules and the CFLAGS settings into a new module/Kbuild.in, which will be used by the kernel kbuild infrastructure, and using KBUILD_EXTMOD to distinguish the two cases within the Makefiles, in order to choose appropriate include directories etc. Module CFLAGS setting is simplified by using subdir-ccflags-y (available since 2.6.30) to set them in the top-level Kbuild instead of each individual module. The disabling of -Wunused-but-set-variable is removed from the lua and zfs modules. The variable that the Makefile uses is actually not defined, so this has no effect; and the warning has long been disabled by the kernel Makefile itself. The target_cpu definition in module/{zfs,zcommon} is removed as it was replaced by use of CONFIG_SPARC64 in commit 70835c5b755e ("Unify target_cpu handling") os/linux/{spl,zfs} are removed from obj-m, as they are not modules in themselves, but are included by the Makefile in the spl and zfs module directories. The vestigial Makefiles in os and os/linux are removed. Reviewed-by: Brian Behlendorf Signed-off-by: Arvind Sankar Closes #10379 Closes #10421 --- configure.ac | 3 +-- copy-builtin | 42 ------------------------------- module/.gitignore | 1 + module/Kbuild.in | 44 +++++++++++++++++++++++++++++++++ module/Makefile.in | 30 +++------------------- module/avl/Makefile.in | 6 ++--- module/icp/Makefile.in | 13 ++++++---- module/lua/Makefile.in | 11 +++------ module/nvpair/Makefile.in | 6 ++--- module/os/Makefile.in | 1 - module/os/linux/Makefile.in | 1 - module/os/linux/zfs/Makefile.in | 2 -- module/spl/Makefile.in | 12 +++++---- module/unicode/Makefile.in | 6 ++--- module/zcommon/Makefile.in | 7 +++--- module/zfs/Makefile.in | 15 ++++++----- 16 files changed, 87 insertions(+), 113 deletions(-) create mode 100644 module/Kbuild.in delete mode 100644 module/os/Makefile.in delete mode 100644 module/os/linux/Makefile.in diff --git a/configure.ac b/configure.ac index 0707384a7..867c3351d 100644 --- a/configure.ac +++ b/configure.ac @@ -170,13 +170,12 @@ AC_CONFIG_FILES([ man/man1/Makefile man/man5/Makefile man/man8/Makefile + module/Kbuild module/Makefile module/avl/Makefile module/icp/Makefile module/lua/Makefile module/nvpair/Makefile - module/os/Makefile - module/os/linux/Makefile module/os/linux/spl/Makefile module/os/linux/zfs/Makefile module/spl/Makefile diff --git a/copy-builtin b/copy-builtin index 81fd17565..f77cbb8ff 100755 --- a/copy-builtin +++ b/copy-builtin @@ -11,21 +11,6 @@ usage() [ "$#" -eq 1 ] || usage KERNEL_DIR="$(readlink --canonicalize-existing "$1")" -MODULES=() - -# When integrated in to a monolithic kernel the spl module must appear -# first. This ensures its module initialization function is run before -# any of the other module initialization functions which depend on it. -MODULES+="spl" - -for MODULE_DIR in module/* module/os/linux/* -do - [ -d "$MODULE_DIR" ] || continue - [ "spl" = "${MODULE_DIR##*/}" ] && continue - [ "os" = "${MODULE_DIR#*/}" ] && continue - MODULES+=("${MODULE_DIR#*/}") -done - if ! [ -e 'zfs_config.h' ] then echo >&2 @@ -43,12 +28,6 @@ cp --recursive include "$KERNEL_DIR/include/zfs" cp --recursive module "$KERNEL_DIR/fs/zfs" cp zfs_config.h "$KERNEL_DIR/include/zfs/" -for MODULE in "${MODULES[@]}" -do - sed -i.bak '/obj =/d' "$KERNEL_DIR/fs/zfs/$MODULE/Makefile" - sed -i.bak '/src =/d' "$KERNEL_DIR/fs/zfs/$MODULE/Makefile" -done - cat > "$KERNEL_DIR/fs/zfs/Kconfig" <<"EOF" config ZFS tristate "ZFS filesystem support" @@ -65,27 +44,6 @@ config ZFS If unsure, say N. EOF -{ - cat <<-"EOF" - ZFS_MODULE_CFLAGS = -I$(srctree)/include/zfs - ZFS_MODULE_CFLAGS += -I$(srctree)/include/zfs/os/linux/spl - ZFS_MODULE_CFLAGS += -I$(srctree)/include/zfs/os/linux/zfs - ZFS_MODULE_CFLAGS += -I$(srctree)/include/zfs/os/linux/kernel - ZFS_MODULE_CFLAGS += -include $(srctree)/include/zfs/zfs_config.h - ZFS_MODULE_CFLAGS += -std=gnu99 -Wno-declaration-after-statement - ZFS_MODULE_CPPFLAGS = -D_KERNEL - ZFS_MODULE_CPPFLAGS += -UDEBUG -DNDEBUG - export ZFS_MODULE_CFLAGS ZFS_MODULE_CPPFLAGS - - obj-$(CONFIG_ZFS) := - EOF - - for MODULE in "${MODULES[@]}" - do - echo 'obj-$(CONFIG_ZFS) += ' "$MODULE/" - done -} > "$KERNEL_DIR/fs/zfs/Kbuild" - add_after() { local FILE="$1" diff --git a/module/.gitignore b/module/.gitignore index 5f3d70487..7a4bd3673 100644 --- a/module/.gitignore +++ b/module/.gitignore @@ -9,6 +9,7 @@ .*.d *.mod +/Kbuild /.cache.mk /.tmp_versions /Module.markers diff --git a/module/Kbuild.in b/module/Kbuild.in new file mode 100644 index 000000000..b42ce9e6d --- /dev/null +++ b/module/Kbuild.in @@ -0,0 +1,44 @@ +# When integrated in to a monolithic kernel the spl module must appear +# first. This ensures its module initialization function is run before +# any of the other module initialization functions which depend on it. +ZFS_MODULES += spl/ +ZFS_MODULES += avl/ +ZFS_MODULES += icp/ +ZFS_MODULES += lua/ +ZFS_MODULES += nvpair/ +ZFS_MODULES += unicode/ +ZFS_MODULES += zcommon/ +ZFS_MODULES += zfs/ + +# The rest is only relevant when run by kbuild +ifneq ($(KERNELRELEASE),) + +obj-$(CONFIG_ZFS) := $(ZFS_MODULES) + +ZFS_MODULE_CFLAGS += -std=gnu99 -Wno-declaration-after-statement +ZFS_MODULE_CFLAGS += @KERNEL_DEBUG_CFLAGS@ @NO_FORMAT_ZERO_LENGTH@ + +ifneq ($(KBUILD_EXTMOD),) +zfs_include = @abs_top_srcdir@/include +ZFS_MODULE_CFLAGS += -include @abs_top_builddir@/zfs_config.h +else +zfs_include = $(srctree)/include/zfs +ZFS_MODULE_CFLAGS += -include $(zfs_include)/zfs_config.h +endif + +ZFS_MODULE_CFLAGS += -I$(zfs_include)/os/linux/kernel +ZFS_MODULE_CFLAGS += -I$(zfs_include)/os/linux/spl +ZFS_MODULE_CFLAGS += -I$(zfs_include)/os/linux/zfs +ZFS_MODULE_CFLAGS += -I$(zfs_include) +ZFS_MODULE_CPPFLAGS += -D_KERNEL +ZFS_MODULE_CPPFLAGS += @KERNEL_DEBUG_CPPFLAGS@ + +ifneq ($(KBUILD_EXTMOD),) +@CONFIG_QAT_TRUE@ZFS_MODULE_CFLAGS += -I@QAT_SRC@/include +@CONFIG_QAT_TRUE@KBUILD_EXTRA_SYMBOLS += @QAT_SYMBOLS@ +endif + +subdir-asflags-y := $(ZFS_MODULE_CFLAGS) $(ZFS_MODULE_CPPFLAGS) +subdir-ccflags-y := $(ZFS_MODULE_CFLAGS) $(ZFS_MODULE_CPPFLAGS) + +endif diff --git a/module/Makefile.in b/module/Makefile.in index 39acdac20..3485649dc 100644 --- a/module/Makefile.in +++ b/module/Makefile.in @@ -1,31 +1,7 @@ -obj-m += avl/ -obj-m += icp/ -obj-m += lua/ -obj-m += nvpair/ -obj-m += spl/ -obj-m += os/linux/spl/ -obj-m += unicode/ -obj-m += zcommon/ -obj-m += zfs/ -obj-m += os/linux/zfs/ +include Kbuild INSTALL_MOD_DIR ?= extra -ZFS_MODULE_CFLAGS += -std=gnu99 -Wno-declaration-after-statement -ZFS_MODULE_CFLAGS += @KERNEL_DEBUG_CFLAGS@ @NO_FORMAT_ZERO_LENGTH@ -ZFS_MODULE_CFLAGS += -include @abs_top_builddir@/zfs_config.h -ZFS_MODULE_CFLAGS += -I@abs_top_srcdir@/include/os/linux/kernel -ZFS_MODULE_CFLAGS += -I@abs_top_srcdir@/include/os/linux/spl -ZFS_MODULE_CFLAGS += -I@abs_top_srcdir@/include/os/linux/zfs -ZFS_MODULE_CFLAGS += -I@abs_top_srcdir@/include -ZFS_MODULE_CPPFLAGS += -D_KERNEL -ZFS_MODULE_CPPFLAGS += @KERNEL_DEBUG_CPPFLAGS@ - -@CONFIG_QAT_TRUE@ZFS_MODULE_CFLAGS += -I@QAT_SRC@/include -@CONFIG_QAT_TRUE@KBUILD_EXTRA_SYMBOLS += @QAT_SYMBOLS@ - -export ZFS_MODULE_CFLAGS ZFS_MODULE_CPPFLAGS - SUBDIR_TARGETS = icp lua all: modules @@ -119,7 +95,7 @@ modules_install: modules_install-@ac_system@ modules_uninstall-Linux: @# Uninstall the kernel modules kmoddir=$(DESTDIR)$(INSTALL_MOD_PATH)/lib/modules/@LINUX_VERSION@ - list='$(obj-m)'; for objdir in $$list; do \ + list='$(ZFS_MODULES)'; for objdir in $$list; do \ $(RM) -R $$kmoddir/$(INSTALL_MOD_DIR)/$$objdir; \ done @@ -129,7 +105,7 @@ modules_uninstall-FreeBSD: modules_uninstall: modules_uninstall-@ac_system@ distdir: - list='$(obj-m)'; for objdir in $$list; do \ + list='$(ZFS_MODULES)'; for objdir in $$list os/linux/spl os/linux/zfs; do \ (cd @top_srcdir@/module && find $$objdir -name '*.[chS]' | \ while read path; do \ mkdir -p @abs_top_builddir@/module/$$distdir/$${path%/*}; \ diff --git a/module/avl/Makefile.in b/module/avl/Makefile.in index 217fa3ca5..991d5f95b 100644 --- a/module/avl/Makefile.in +++ b/module/avl/Makefile.in @@ -1,10 +1,10 @@ -src = @abs_top_srcdir@/module/avl +ifneq ($(KBUILD_EXTMOD),) +src = @abs_srcdir@ obj = @abs_builddir@ +endif MODULE := zavl obj-$(CONFIG_ZFS) := $(MODULE).o -ccflags-y := $(ZFS_MODULE_CFLAGS) $(ZFS_MODULE_CPPFLAGS) - $(MODULE)-objs += avl.o diff --git a/module/icp/Makefile.in b/module/icp/Makefile.in index b6d34d15a..7a01b2f08 100644 --- a/module/icp/Makefile.in +++ b/module/icp/Makefile.in @@ -1,14 +1,17 @@ -src = @abs_top_srcdir@/module/icp +ifneq ($(KBUILD_EXTMOD),) +src = @abs_srcdir@ obj = @abs_builddir@ +icp_include = $(src)/include +else +icp_include = $(srctree)/$(src)/include +endif MODULE := icp obj-$(CONFIG_ZFS) := $(MODULE).o -asflags-y := -I@abs_top_srcdir@/module/icp/include -asflags-y += $(ZFS_MODULE_CFLAGS) $(ZFS_MODULE_CPPFLAGS) -ccflags-y := -I@abs_top_srcdir@/module/icp/include -ccflags-y += $(ZFS_MODULE_CFLAGS) $(ZFS_MODULE_CPPFLAGS) +asflags-y := -I$(icp_include) +ccflags-y := -I$(icp_include) $(MODULE)-objs += illumos-crypto.o $(MODULE)-objs += api/kcf_cipher.o diff --git a/module/lua/Makefile.in b/module/lua/Makefile.in index d49065fbe..0a74c17e6 100644 --- a/module/lua/Makefile.in +++ b/module/lua/Makefile.in @@ -1,16 +1,13 @@ -src = @abs_top_srcdir@/module/lua +ifneq ($(KBUILD_EXTMOD),) +src = @abs_srcdir@ obj = @abs_builddir@ +endif MODULE := zlua obj-$(CONFIG_ZFS) := $(MODULE).o -asflags-y += $(ZFS_MODULE_CFLAGS) -ccflags-y := $(ZFS_MODULE_CFLAGS) $(ZFS_MODULE_CPPFLAGS) -ccflags-y += -DLUA_USE_LONGLONG - -# Suppress unused but set variable warnings often due to ASSERTs -ccflags-y += $(NO_UNUSED_BUT_SET_VARIABLE) +ccflags-y := -DLUA_USE_LONGLONG $(MODULE)-objs += lapi.o $(MODULE)-objs += lauxlib.o diff --git a/module/nvpair/Makefile.in b/module/nvpair/Makefile.in index f420ef98b..d81452366 100644 --- a/module/nvpair/Makefile.in +++ b/module/nvpair/Makefile.in @@ -1,12 +1,12 @@ -src = @abs_top_srcdir@/module/nvpair +ifneq ($(KBUILD_EXTMOD),) +src = @abs_srcdir@ obj = @abs_builddir@ +endif MODULE := znvpair obj-$(CONFIG_ZFS) := $(MODULE).o -ccflags-y := $(ZFS_MODULE_CFLAGS) $(ZFS_MODULE_CPPFLAGS) - $(MODULE)-objs += nvpair.o $(MODULE)-objs += fnvpair.o $(MODULE)-objs += nvpair_alloc_spl.o diff --git a/module/os/Makefile.in b/module/os/Makefile.in deleted file mode 100644 index b9990d1bc..000000000 --- a/module/os/Makefile.in +++ /dev/null @@ -1 +0,0 @@ -subdirs-m = linux diff --git a/module/os/linux/Makefile.in b/module/os/linux/Makefile.in deleted file mode 100644 index ab01708a3..000000000 --- a/module/os/linux/Makefile.in +++ /dev/null @@ -1 +0,0 @@ -subdirs-m = spl zfs diff --git a/module/os/linux/zfs/Makefile.in b/module/os/linux/zfs/Makefile.in index cb4edbbc1..9f493ef16 100644 --- a/module/os/linux/zfs/Makefile.in +++ b/module/os/linux/zfs/Makefile.in @@ -5,8 +5,6 @@ # Suppress unused-value warnings in sparc64 architecture headers ccflags-$(CONFIG_SPARC64) += -Wno-unused-value -ccflags-y += -I@abs_top_srcdir@/module/os/linux/zfs - $(MODULE)-objs += ../os/linux/zfs/abd_os.o $(MODULE)-objs += ../os/linux/zfs/arc_os.o $(MODULE)-objs += ../os/linux/zfs/mmp_os.o diff --git a/module/spl/Makefile.in b/module/spl/Makefile.in index 8602f4edd..cedbfe92b 100644 --- a/module/spl/Makefile.in +++ b/module/spl/Makefile.in @@ -1,11 +1,13 @@ -src = @abs_top_srcdir@/module/spl +ifneq ($(KBUILD_EXTMOD),) +src = @abs_srcdir@ obj = @abs_builddir@ +mfdir = $(obj) +else +mfdir = $(srctree)/$(src) +endif MODULE := spl obj-$(CONFIG_ZFS) := $(MODULE).o -ccflags-y := $(ZFS_MODULE_CFLAGS) $(ZFS_MODULE_CPPFLAGS) - - --include @abs_top_builddir@/module/os/linux/spl/Makefile +include $(mfdir)/../os/linux/spl/Makefile diff --git a/module/unicode/Makefile.in b/module/unicode/Makefile.in index 82c90373a..59c07c455 100644 --- a/module/unicode/Makefile.in +++ b/module/unicode/Makefile.in @@ -1,11 +1,11 @@ -src = @abs_top_srcdir@/module/unicode +ifneq ($(KBUILD_EXTMOD),) +src = @abs_srcdir@ obj = @abs_builddir@ +endif MODULE := zunicode obj-$(CONFIG_ZFS) := $(MODULE).o -ccflags-y := $(ZFS_MODULE_CFLAGS) $(ZFS_MODULE_CPPFLAGS) - $(MODULE)-objs += u8_textprep.o $(MODULE)-objs += uconv.o diff --git a/module/zcommon/Makefile.in b/module/zcommon/Makefile.in index 01e0692eb..b5cdf4c0c 100644 --- a/module/zcommon/Makefile.in +++ b/module/zcommon/Makefile.in @@ -1,13 +1,12 @@ -src = @abs_top_srcdir@/module/zcommon +ifneq ($(KBUILD_EXTMOD),) +src = @abs_srcdir@ obj = @abs_builddir@ -target_cpu = @target_cpu@ +endif MODULE := zcommon obj-$(CONFIG_ZFS) := $(MODULE).o -ccflags-y := $(ZFS_MODULE_CFLAGS) $(ZFS_MODULE_CPPFLAGS) - # Suppress unused-value warnings in sparc64 architecture headers ccflags-$(CONFIG_SPARC64) += -Wno-unused-value diff --git a/module/zfs/Makefile.in b/module/zfs/Makefile.in index 3a9663997..7ea976d12 100644 --- a/module/zfs/Makefile.in +++ b/module/zfs/Makefile.in @@ -1,16 +1,15 @@ -src = @abs_top_srcdir@/module/zfs +ifneq ($(KBUILD_EXTMOD),) +src = @abs_srcdir@ obj = @abs_builddir@ -target_cpu = @target_cpu@ +mfdir = $(obj) +else +mfdir = $(srctree)/$(src) +endif MODULE := zfs obj-$(CONFIG_ZFS) := $(MODULE).o -ccflags-y := $(ZFS_MODULE_CFLAGS) $(ZFS_MODULE_CPPFLAGS) - -# Suppress unused but set variable warnings often due to ASSERTs -ccflags-y += $(NO_UNUSED_BUT_SET_VARIABLE) - # Suppress unused-value warnings in sparc64 architecture headers ccflags-$(CONFIG_SPARC64) += -Wno-unused-value @@ -150,4 +149,4 @@ ifeq ($(CONFIG_ALTIVEC),y) $(obj)/vdev_raidz_math_powerpc_altivec.o: c_flags += -maltivec endif --include @abs_top_builddir@/module/os/linux/zfs/Makefile +include $(mfdir)/../os/linux/zfs/Makefile