From: Ralf Baechle <ralf@linux-mips.org>
Date: Thu, 24 May 2007 13:56:58 +0000 (+0100)
Subject: [MIPS] SMTC: Don't set and restore irqregs ptr from self_ipi.
X-Git-Tag: v2.6.22-rc5~49^2~10
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=da9bc7263dc7e32d52dd922fe3f46eb7107c0143;p=pandora-kernel.git

[MIPS] SMTC: Don't set and restore irqregs ptr from self_ipi.

This did corrupt register s0 which the caller of self_ipi expects to
be unchanged.  This is a kernel bug which will only be triggered with
the compilers which compile __smtc_ipi_replay to use s0 across the
invocation of self_ipi. Gcc 4.1.2 does this, for example.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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