From: Michael Ellerman Date: Wed, 25 Jan 2006 08:48:48 +0000 (+1300) Subject: [PATCH] powerpc: Refuse to boot a kdump kernel via OF X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=cdc3ee8f2061bafe7593bab0096a0e711408b0f9;p=openwrt%2Fstaging%2Fblogic.git [PATCH] powerpc: Refuse to boot a kdump kernel via OF You can't boot a kdump kernel via OF, not reliably anyway, the kernel being at 32 MB conflicts with the zImage wrapper etc. and it blows up. It's trivial to check in prom_init though, and this is early enough that we can actually drop back to OF where a reset-all will get you going again, which is kinda nice. I think this should go in for 2.6.16. Signed-off-by: Michael Ellerman Signed-off-by: Paul Mackerras --- diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c index 7881ec96ef11..ec7153f4d47c 100644 --- a/arch/powerpc/kernel/prom_init.c +++ b/arch/powerpc/kernel/prom_init.c @@ -2098,6 +2098,10 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4, */ prom_init_stdout(); + /* Bail if this is a kdump kernel. */ + if (PHYSICAL_START > 0) + prom_panic("Error: You can't boot a kdump kernel from OF!\n"); + /* * Check for an initrd */