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From: Arnd Bergmann <arnd@arndb.de>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: kernel-build-reports@lists.linaro.org,
	linux-kernel@vger.kernel.org, Arnd Bergmann <arnd@arndb.de>
Subject: [PATCH 1/3] kconfig: tinyconfig: provide whole choice blocks to avoid warnings
Date: Mon, 29 Aug 2016 23:49:50 +0200
Message-ID: <20160829214952.1334674-2-arnd@arndb.de> (raw)
In-Reply-To: <20160829214952.1334674-1-arnd@arndb.de>

Using "make tinyconfig" produces a couple of annoying warnings that show up
for build test machines all the time:

    .config:966:warning: override: NOHIGHMEM changes choice state
    .config:965:warning: override: SLOB changes choice state
    .config:963:warning: override: KERNEL_XZ changes choice state
    .config:962:warning: override: CC_OPTIMIZE_FOR_SIZE changes choice state
    .config:933:warning: override: SLOB changes choice state
    .config:930:warning: override: CC_OPTIMIZE_FOR_SIZE changes choice state
    .config:870:warning: override: SLOB changes choice state
    .config:868:warning: override: KERNEL_XZ changes choice state
    .config:867:warning: override: CC_OPTIMIZE_FOR_SIZE changes choice state

I've made a previous attempt at fixing them and we discussed a number of
alternatives.

I tried changing the Makefile to use "merge_config.sh -n $(fragment-list)"
but couldn't get that to work properly.

This is yet another approach, based on the observation that we do want
to see a warning for conflicting 'choice' options, and that we can simply
make them non-conflicting by listing all other options as disabled.
This is a trivial patch that we can apply independent of plans for other
changes.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://storage.kernelci.org/mainline/v4.7-rc6/x86-tinyconfig/build.log
https://patchwork.kernel.org/patch/9212749/
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Reviewed-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
---
This version incorporates feedback from Masahiro Yamada, and includes
the x86 change that Josh mentioned
---
 arch/x86/configs/tiny.config | 2 ++
 kernel/configs/tiny.config   | 8 ++++++++
 2 files changed, 10 insertions(+)

diff --git a/arch/x86/configs/tiny.config b/arch/x86/configs/tiny.config
index 4e2ecfa23c15..4b429df40d7a 100644
--- a/arch/x86/configs/tiny.config
+++ b/arch/x86/configs/tiny.config
@@ -1 +1,3 @@
 CONFIG_NOHIGHMEM=y
+# CONFIG_HIGHMEM4G is not set
+# CONFIG_HIGHMEM64G is not set
diff --git a/kernel/configs/tiny.config b/kernel/configs/tiny.config
index c2de56ab0fce..7fa0c4ae6394 100644
--- a/kernel/configs/tiny.config
+++ b/kernel/configs/tiny.config
@@ -1,4 +1,12 @@
+# CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE is not set
 CONFIG_CC_OPTIMIZE_FOR_SIZE=y
+# CONFIG_KERNEL_GZIP is not set
+# CONFIG_KERNEL_BZIP2 is not set
+# CONFIG_KERNEL_LZMA is not set
 CONFIG_KERNEL_XZ=y
+# CONFIG_KERNEL_LZO is not set
+# CONFIG_KERNEL_LZ4 is not set
 CONFIG_OPTIMIZE_INLINING=y
+# CONFIG_SLAB is not set
+# CONFIG_SLUB is not set
 CONFIG_SLOB=y
-- 
2.9.0

  reply index

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-08-29 21:49 [PATCH 0/3] v4.8 remaining ARM warning fixes Arnd Bergmann
2016-08-29 21:49 ` Arnd Bergmann [this message]
2016-08-29 21:49 ` [PATCH 2/3] test/hash: Fix warning in two-dimensional array init Arnd Bergmann
2016-08-29 21:49 ` [PATCH 3/3] test/hash: Fix warning in preprocessor symbol evaluation Arnd Bergmann

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