tree b9460ce77ef52c26688abd76e615f006558dd5ae
parent fb0459d75c1d0a4ba3cafdd2c754e7486968a676
author Paul Mundt <lethal@linux-sh.org> 1254738186 +0900
committer Frederic Weisbecker <fweisbec@gmail.com> 1257267944 +0100

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>