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[MIPS] Probe initrd header only if explicitly specified

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Currently init_initrd() probes initrd header at the last page of kernel
image, but it is valid only if addinitrd was used.  If addinitrd was not
used, the area contains garbage so probing there might misdetect initrd
header (magic number is not strictly robust).

This patch introduces CONFIG_PROBE_INITRD_HEADER to explicitly enable this
probing.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Atsushi Nemoto
2008-08-26 22:34:57 +09:00
committed by Ralf Baechle
parent 3885ec8ca2
commit 0011036bee
2 changed files with 27 additions and 15 deletions
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9
arch/mips/Kconfig
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@@ -1886,6 +1886,15 @@ config STACKTRACE_SUPPORT
source "init/Kconfig"
config PROBE_INITRD_HEADER
bool "Probe initrd header created by addinitrd"
depends on BLK_DEV_INITRD
help
Probe initrd header at the last page of kernel image.
Say Y here if you are using arch/mips/boot/addinitrd.c to
add initrd or initramfs image to the kernel image.
Otherwise, say N.
menu "Bus options (PCI, PCMCIA, EISA, ISA, TC)"
config HW_HAS_EISA