Re: [PATCH v2 03/13] x86: Add macro for 64bit entry startup_64

[Yinghai Lu]

On Tue, Nov 20, 2012 at 12:44 PM, H. Peter Anvin <hpa@xxxxxxxxx> wrote:
> I don't see any point in three flags here.  Let's stick to one flag; then it fits in the existing boot_flags field.

the magic AA55

boot/header.S:boot_flag:        .word 0xAA55

if change that to other value, would it break existing boot loader?
aka old boot loader could boot the new bzImage anymore.

Thanks

Yinghai
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