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authorRichard Purdie <rpurdie@rpsys.net>2008-01-02 00:56:46 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2008-02-04 13:21:03 +0000
commit4cd9d6f774c7e0578bbc4409d4490d8f2097d40a (patch)
treec910cfc0def573a681fe8c75e1e35abd93496151 /arch/arm/Kconfig
parentae9458d6a0956aa21cb49e1251e35a8d4dacbe6e (diff)
[ARM] 4736/1: Export atags to userspace and allow kexec to use customised atags
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 saved. Based on a patch from Uli Luckas <u.luckas@road.de> Signed-off-by: Richard Purdie <rpurdie@rpsys.net> Acked-by: Uli Luckas <u.luckas@road.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/Kconfig')
-rw-r--r--arch/arm/Kconfig7
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 4b1a8e3d292..4bd8952eef9 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -894,6 +894,13 @@ config KEXEC
initially work for you. It may help to enable device hotplugging
support.
+config ATAGS_PROC
+ bool "Export atags in procfs"
+ default n
+ help
+ Should the atags used to boot the kernel be exported in an "atags"
+ file in procfs. Useful with kexec.
+
endmenu
if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)