From: Toshihiro HANAWA <hanawa@ccs.tsukuba.ac.jp>
Date: Fri, 2 Oct 2009 08:52:54 +0000 (+0900)
Subject: m32r: Fix IPI function calls for SMP
X-Git-Tag: v2.6.32-rc3~7^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0a3d31b79e7fa600108e699805e2b2f9ea1f3194;p=pandora-kernel.git

m32r: Fix IPI function calls for SMP

This patch fixes the m32r SMP kernel after 2.6.27.

A part of the following patch breaks m32r SMP operation.
> m32r: convert to generic helpers for IPI function calls
> commit 7b7426c8a615cf61df9a77b9df7d5b75d91e3fa0

In the above patch, a CALL_FUNC_SINGLE_IPI was newly introduced,
but the its IPI vector number was wrong in the patch code.

The m32r SMP kernel hanged-up during boot operation, because
the CPU_BOOT_IPI was called instead of CALL_FUNC_SINGLE_IPI
(CPU_BOOT_IPI had no side effect at that time because the 2nd
core had already been started up),
as a result, csd_unlock() was not called, then a dead lock
occurred in csd_lock_wait() after the detection of Compact Flash
memory as IDE generic disk.

Signed-off-by: Toshihiro HANAWA <hanawa@ccs.tsukuba.ac.jp>
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
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