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3dae09de40
Add "stack_order" sysfs attribute which holds the order in which a live patch module was loaded into the system. A user can then determine an active live patched version of a function. cat /sys/kernel/livepatch/livepatch_1/stack_order -> 1 means that livepatch_1 is the first live patch applied cat /sys/kernel/livepatch/livepatch_module/stack_order -> N means that livepatch_module is the Nth live patch applied Suggested-by: Petr Mladek <pmladek@suse.com> Suggested-by: Miroslav Benes <mbenes@suse.cz> Suggested-by: Josh Poimboeuf <jpoimboe@kernel.org> Signed-off-by: Wardenjohn <zhangwarden@gmail.com> Acked-by: Josh Poimboeuf <jpoimboe@kernel.org> Reviewed-by: Petr Mladek <pmladek@suse.com> Tested-by: Petr Mladek <pmladek@suse.com> Reviewed-by: Miroslav Benes <mbenes@suse.cz> Link: https://lore.kernel.org/r/20241008014856.3729-2-zhangwarden@gmail.com [pmladek@suse.com: Updated kernel version and date in the ABI documentation.] Signed-off-by: Petr Mladek <pmladek@suse.com>