• Richard Purdie's avatar
    [ARM] 4736/1: Export atags to userspace and allow kexec to use customised atags · 4cd9d6f7
    Richard Purdie authored
    Currently, the atags used by kexec are fixed to the ones originally used
    to boot the kernel. This is less than ideal as changing the commandline,
    initrd and other options would be a useful feature.
    This patch exports the atags used for the current kernel to userspace
    through an "atags" file in procfs. The presence of the file is
    controlled by its own Kconfig option and cleans up several ifdef blocks
    into a separate file. The tags for the new kernel are assumed to be at
    a fixed location before the kernel image itself. The location of the
    tags used to boot the original kernel is unimportant and no longer
    Based on a patch from Uli Luckas <u.luckas@road.de>
    Signed-off-by: default avatarRichard Purdie <rpurdie@rpsys.net>
    Acked-by: default avatarUli Luckas <u.luckas@road.de>
    Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>