hw_breakpoints: Allow arch-specific cleanup before breakpoint unregistration
Certain architectures (such as PowerPC) have a need to clean up data
structures before a breakpoint is unregistered. This introduces an
arch-specific hook in release_bp_slot() along with a weak definition
in the form of a stub function.
Signed-off-by: K.Prasad <prasad@linux.vnet.ibm.com>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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