From: Simon Horman <horms+renesas@verge.net.au>
Date: Fri, 26 Jul 2013 08:53:42 +0000 (+0900)
Subject: ARM: shmobile: lager: do not annotate gpio_buttons as __initdata
X-Git-Tag: v3.11-rc5~26^2~5^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a601469386b543df2a4d97ad7d524716945278a3;p=pandora-kernel.git

ARM: shmobile: lager: do not annotate gpio_buttons as __initdata

When the gpio-keys device is registered using
platform_device_register_data() the platform data argument,
lager_keys_pdata is duplicated and thus should be marked as __initdata
to avoid wasting memory. However, this is not true of gpio_buttons,
a reference to it rather than its value is duplicated when lager_keys_pdata
is duplicated.

This avoids accessing freed memory if gpio-key events occur
after unused kernel memory is freed late in the kernel's boot.

This but was added when support for gpio-keys was added to lager
in c3842e4fcbb7664276443b79187b7808c2e80a35
("ARM: shmobile: lager: support GPIO switches") which was included
in v3.11-rc1.

Tested-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
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