I use a board with MPC866T and 2.6.28 Linux Kernel. Occasionally, the
unflattened device is corrupted after "unflatten_device_tree()" which
causes crash of kernel when device tree is traversed later on.
I looked at the fixes in lib/lmb.c, arch/powerpc/mm, arch/powerpc/kernel
etc since 2.6.28 to 2.6.32-r4 (the most recent version) and could not
fix my problem.
I have had a hard time trying to determine the cause.
arch/powerpc/kernel/setup_32.c
void __init setup_arch(char **cmdline_p)
{
*cmdline_p = cmd_line;
/* so udelay does something sensible, assume <= 1000 bogomips */
loops_per_jiffy = 500000000 / HZ;
unflatten_device_tree();
/* UNFLATTENED DEVICE TREE IS CORRUPTED SOMETIMES HERE */
check_for_initrd();
......
}
Any ideas?
Thanks.
Lixin Yao
Harris Startex Networks Inc.
RTP, NC, USA
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