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authorMathieu Desnoyers <mathieu.desnoyers@polymtl.ca>2008-02-02 15:10:33 -0500
committerSam Ravnborg <sam@ravnborg.org>2008-02-03 08:58:07 +0100
commitfb32e03fdc170251a381449a8d9b82cf7e811a6f (patch)
tree9b7c0ad2f097bdc0498e6ca07b9e83b1f2aac1bc
parentc0ffa3a951668734a635cd1e26bf7583795854c5 (diff)
downloadlinux-linaro-fb32e03fdc170251a381449a8d9b82cf7e811a6f.tar.gz
Create arch/Kconfig
Puts the content of arch/Kconfig in the "General setup" menu. Linus: > Should it come with a re-duplication of it's content into each > architecture, which was the case previously ? The oprofile and kprobes > menu entries were litteraly cut and pasted from one architecture to > another. Should we put its content in init/Kconfig then ? I don't think it's a good idea to go back to making it per-architecture, although that extensive "depends on <list-of-archiectures-here>" might indicate that there certainly is room for cleanup there. And I don't think it's wrong keeping it in kernel/Kconfig.xyz per se, I just think it's wrong to (a) lump the code together when it really doesn't necessarily need to and (b) show it to users as some kind of choice that is tied together (whether it then has common code or not). On the per-architecture side, I do think it would be better to *not* have internal architecture knowledge in a generic file, and as such a line like depends on X86_32 || IA64 || PPC || S390 || SPARC64 || X86_64 || AVR32 really shouldn't exist in a file like kernel/Kconfig.instrumentation. It would be much better to do depends on ARCH_SUPPORTS_KPROBES in that generic file, and then architectures that do support it would just have a bool ARCH_SUPPORTS_KPROBES default y in *their* architecture files. That would seem to be much more logical, and is readable both for arch maintainers *and* for people who have no clue - and don't care - about which architecture is supposed to support which interface... Sam Ravnborg: Stuff it into a new file: arch/Kconfig We can then extend this file to include all the 'trailing' Kconfig things that are anyway equal for all ARCHs. But it should be kept clean - so if we introduce such a file then we should use ARCH_HAS_whatever in the arch specific Kconfig files to enable stuff that is not shared. [...] The above suggestion is actually not exactly the best way to do it... First the naming.. A quick grep shows following usage today (in Kconfig files) ARCH_HAS 51 ARCH_SUPPORTS 4 HAVE_ARCH 7 ARCH_HAS is the clear winner. In the common Kconfig file do: config FOO depends on ARCH_HAS_FOO bool "bla bla" config ARCH_HAS_FOO def_bool n In the arch specific Kconfig file in a suitable place do: config SUITABLE_OPTION select ARCH_HAS_FOO The naming of ARCH_HAS_ is fixed and shall be: ARCH_HAS_<config option it will enable> Only a single line added pr. architecture. And we will end up with a (maybe even commented) list of trivial selects. - Yet another update : Moving to HAVE_* now. Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Cc: Jeff Dike <jdike@addtoit.com> Cc: David Howells <dhowells@redhat.com> Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
-rw-r--r--arch/Kconfig3
-rw-r--r--init/Kconfig2
2 files changed, 5 insertions, 0 deletions
diff --git a/arch/Kconfig b/arch/Kconfig
new file mode 100644
index 00000000000..24917145058
--- /dev/null
+++ b/arch/Kconfig
@@ -0,0 +1,3 @@
+#
+# General architecture dependent options
+#
diff --git a/init/Kconfig b/init/Kconfig
index dcc96a8c8c6..8de6c48cfde 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -665,6 +665,8 @@ config SLOB
endchoice
+source "arch/Kconfig"
+
endmenu # General setup
config SLABINFO