From: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Date: Mon, 13 Jun 2005 21:59:44 +0000 (-0700)
Subject: [IPV6]: Ensure to use icmpv6_socket in non-preemptive context.
X-Git-Tag: v2.6.12~28^2~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=84427d533076a08137779b3182a71c37bf000b27;p=pandora-kernel.git

[IPV6]: Ensure to use icmpv6_socket in non-preemptive context.

We saw following trace several times:

|BUG: using smp_processor_id() in preemptible [00000001] code: httpd/30137
|caller is icmpv6_send+0x23/0x540
| [<c01ad63b>] smp_processor_id+0x9b/0xb8
| [<c02993e7>] icmpv6_send+0x23/0x540

This is because of icmpv6_socket, which is the only one user of
smp_processor_id() in icmpv6_send(), AFAIK.

Since it should be used in non-preemptive context,
let's defer the dereference after disabling preemption
(by icmpv6_xmit_lock()).

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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