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| author | Paul Burton <paul.burton@imgtec.com> | 2017-08-07 16:01:12 -0700 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2017-08-30 00:57:28 +0200 |
| commit | 27e0d4b0510700108341c50661f78a10969648df (patch) | |
| tree | 5ba8080ab0f33c8b3603f15f37e6c7cb8666f513 /arch/mips/Makefile | |
| parent | 1ec9dd80bedc208c00b18069cfd615a4cbfeab17 (diff) | |
| download | linux-stable-27e0d4b0510700108341c50661f78a10969648df.tar.gz linux-stable-27e0d4b0510700108341c50661f78a10969648df.tar.bz2 linux-stable-27e0d4b0510700108341c50661f78a10969648df.zip | |
MIPS: generic: Allow filtering enabled boards by requirements
Up until now when configuring a generic kernel all board config
fragments have been merged by default unless boards are explicitly
selected by the user specifying BOARDS=.
In many cases this is sub-optimal, since some boards don't make sense to
include in some kernels. For example the MIPS SEAD-3 development board
has only ever been used with 32 bit CPUs, so including support for the
SEAD-3 in a 64 bit kernel is wasteful.
This patch introduces support for specifying requirements in board
config fragments, using comments formatted like so:
# require CONFIG_BLA=y
For example the SEAD-3 board could specify that it should only be merged
for 32 bit kernels using a requirement line like the following:
# require CONFIG_32BIT=y
A new generic-board-config.sh script is introduced to handle selecting
the board config fragments to merge & calling merge_config.sh to merge
them. In order to allow requirements to check Kconfig symbols that are
implicitly selected, rather than explicitly specified by
generic_defconfig or one of the ISA config fragments, an intermediate
.config file is saved & used as a reference when checking requirements.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/16943/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/Makefile')
| -rw-r--r-- | arch/mips/Makefile | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/arch/mips/Makefile b/arch/mips/Makefile index 38360f776b6f..0e0aa64a9c88 100644 --- a/arch/mips/Makefile +++ b/arch/mips/Makefile @@ -500,8 +500,14 @@ $(eval $(call gen_generic_defconfigs,micro32,r2,eb el)) .PHONY: $(generic_defconfigs) $(generic_defconfigs): $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \ - -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/generic_defconfig $^ \ - $(foreach board,$(BOARDS),$(generic_config_dir)/board-$(board).config) + -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/generic_defconfig $^ | \ + grep -Ev '^#' + $(Q)cp $(KCONFIG_CONFIG) $(objtree)/.config.$@ + $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig \ + KCONFIG_CONFIG=$(objtree)/.config.$@ >/dev/null + $(Q)$(CONFIG_SHELL) $(srctree)/arch/$(ARCH)/tools/generic-board-config.sh \ + $(srctree) $(objtree) $(objtree)/.config.$@ $(KCONFIG_CONFIG) \ + "$(origin BOARDS)" $(BOARDS) $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig # |