From: Paul Mundt <lethal@linux-sh.org>
Date: Mon, 5 Oct 2009 10:23:06 +0000 (+0900)
Subject: x86/hw-breakpoints: Actually flush thread breakpoints in flush_thread().
X-Git-Tag: v2.6.33-rc1~399^2~146^2~12
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=41a48d14f6991020c9bb6b93e289ca5b411ed09a;p=pandora-kernel.git

x86/hw-breakpoints: Actually flush thread breakpoints in flush_thread().

flush_thread() tries to do a TIF_DEBUG check before calling in to
flush_thread_hw_breakpoint() (which subsequently clears the thread flag),
but for some reason, the x86 code is manually clearing TIF_DEBUG
immediately before the test, so this path will never be taken.

This kills off the erroneous clear_tsk_thread_flag() and lets
flush_thread_hw_breakpoint() actually get invoked.

Presumably folks were getting lucky with testing and the
free_thread_info() -> free_thread_xstate() path was taking care of the
flush there.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Acked-by: "K.Prasad" <prasad@linux.vnet.ibm.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Alan Stern <stern@rowland.harvard.edu>
LKML-Reference: <20091005102306.GA7889@linux-sh.org>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
---

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