On 9/1/21 07:19, Imran Khan wrote:
> To print a stack entries, users of stackdepot, first
> use stack_depot_fetch to get a list of stack entries
> and then use stack_trace_print to print this list.
> Provide a helper in stackdepot to print stack entries
> based on stackdepot handle.
>
> Signed-off-by: Imran Khan <imran.f.khan@xxxxxxxxxx>
> Suggested-by: Vlastimil Babka <vbabka@xxxxxxx>
You should convert existing users together with the patch that introduces
the helper. I think print_stack() in mm/kasan/report.c, and
__dump_page_owner() could use this.
> ---
> lib/stackdepot.c | 17 +++++++++++++++++
> 1 file changed, 17 insertions(+)
It's missing a declaration in include/linux/stackdepot.h
Perhaps it could be all be a static inline there anyway.
> diff --git a/lib/stackdepot.c b/lib/stackdepot.c
> index 1d42ef9ef766..eab4476b060b 100644
> --- a/lib/stackdepot.c
> +++ b/lib/stackdepot.c
> @@ -214,6 +214,23 @@ static inline struct stack_record *find_stack(struct stack_record *bucket,
> return NULL;
> }
>
> +/**
> + * stack_depot_print - print stack entries from a depot
> + *
> + * @handle: Stack depot handle which was returned from
> + * stack_depot_save().
> + *
> + */
> +void stack_depot_print(depot_stack_handle_t stack)
> +{
> + unsigned long *entries;
> + unsigned int nr_entries;
> +
> + nr_entries = stack_depot_fetch(stack, &entries);
> + stack_trace_print(entries, nr_entries, 0);
> +}
> +EXPORT_SYMBOL_GPL(stack_depot_print);
> +
> /**
> * stack_depot_fetch - Fetch stack entries from a depot
> *
>
