From: Arnd Bergmann <arnd@arndb.de>
To: linux-arm-kernel@lists.infradead.org
Cc: David Woodhouse <dwmw2@infradead.org>,
        Brian Norris <computersforpeace@gmail.com>,
        linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: [PATCH] mtd: cfi: don't warn about broken geometry for !CONFIG_MTD
Date: Tue, 24 Nov 2015 23:09:02 +0100
Message-ID: <7025557.qur2fOT79A@wuerfel>
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The linux/mtd/map.h header file is included by a couple of
platform specific files that are built even when CONFIG_MTD
is disabled, and we always get

 warning "No CONFIG_MTD_MAP_BANK_WIDTH_xx selected. No NOR chip support can work"

in that case. This adds an #ifdef around the pointless warning,
as everything is really fine when we don't build the drivers
anyway.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
> I'm actually still getting the warnings for any file that includes <linux/mtd/map.h>
> while CONFIG_MTD is disabled. I have a fix now that I'm testing overnight
> and plan to post tomorrow, then we can decide whether it should be part of
> the same patch, or we should have two separate patches.

The patch fixes the remaining warnings I see on ARM randconfigs in this file,
and I think it makes sense to keep it as a separate patch, as these are really
distinct problems even thought the symptom is the same.

Please apply both.

diff --git a/include/linux/mtd/map.h b/include/linux/mtd/map.h
index 366cf77953b5..58f3ba709ade 100644
--- a/include/linux/mtd/map.h
+++ b/include/linux/mtd/map.h
@@ -142,7 +142,9 @@
 #endif
 
 #ifndef map_bankwidth
+#ifdef CONFIG_MTD
 #warning "No CONFIG_MTD_MAP_BANK_WIDTH_xx selected. No NOR chip support can work"
+#endif
 static inline int map_bankwidth(void *map)
 {
 	BUG();

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