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H A Dhw_breakpoint.cdiff e64877dcf5fd05d81fa195785a738f3a729587a3 Fri Sep 21 08:53:13 CDT 2012 Will Deacon <will.deacon@arm.com> ARM: hw_breakpoint: only clear OS lock when implemented on v7

The OS save and restore register are optional in debug architecture v7,
so check the status register before attempting to clear the OS lock.

Tested-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>