xmon: Clear all breakpoints when xmon is disabled via debugfs

Michael Ellerman patch-notifications at ellerman.id.au
Wed Mar 14 20:28:33 AEDT 2018

On Sun, 2018-03-04 at 17:31:32 UTC, Vaibhav Jain wrote:
> Presently when xmon is disabled by debugfs any existing
> instruction/data-access breakpoints set are not disabled. This may
> lead to kernel oops when those breakpoints are hit as the necessary
> debugger hooks aren't installed.
> Hence this patch introduces a new function named clear_all_bpt()
> which is called when xmon is disabled via debugfs. The function will
> unpatch/clear all the trap and ciabr/dab based breakpoints.
> Signed-off-by: Vaibhav Jain <vaibhav at linux.vnet.ibm.com>
> Reviewed-by: Balbir Singh <bsingharora at gmail.com>

Applied to powerpc next, thanks.



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