linux-kernel - latent problem in free_init

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Message-Id: <4BA35F3E0200007800035DCC@vpn.id2.novell.com>
Date:	Fri, 19 Mar 2010 10:25:50 +0000
From:	"Jan Beulich" <JBeulich@...ell.com>
To:	"Ingo Molnar" <mingo@...e.hu>, <arjan@...ux.intel.com>
Cc:	<linux-kernel@...r.kernel.org>
Subject: latent problem in free_init_pages()

The calls to set_memory_rw() and set_memory_np() that both of you
added for 2.6.25 imply that both "begin" and "end" are page aligned.
This isn't the case, however, for the initrd and SMP locks. While at
present this doesn't appear to do any harm, it partly subverts the
debugging effect of the latter change and would result in a real issue
if the .smp_locks section was moved into the read-only portion of the
kernel image (where it really belongs imo).

Jan

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