Re: [for-next][PATCH 04/18] arm64: function_graph: Simplify with function_graph_entry()

[Will Deacon]

On Wed, Nov 21, 2018 at 07:28:05PM -0500, Steven Rostedt wrote:
> From: "Steven Rostedt (VMware)" <rostedt@xxxxxxxxxxx>
> 
> The function_graph_entry() function does the work of calling the function
> graph hook function and the management of the shadow stack, simplifying the
> work done in the architecture dependent prepare_ftrace_return().
> 
> Have arm64 use the new code, and remove the shadow stack management as well as
> having to set up the trace structure.
> 
> This is needed to prepare for a fix of a design bug on how the curr_ret_stack
> is used.
> 
> Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
> Cc: Will Deacon <will.deacon@xxxxxxx>
> Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
> Cc: stable@xxxxxxxxxx
> Fixes: 03274a3ffb449 ("tracing/fgraph: Adjust fgraph depth before calling trace return callback")
> Signed-off-by: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx>
> ---
>  arch/arm64/kernel/ftrace.c | 15 +--------------
>  1 file changed, 1 insertion(+), 14 deletions(-)

Minor nit: the subject refers to function_graph_entry(), but looks like
you settled on function_graph_enter() in the end.

Anyway, looks like no change for us, so:

Acked-by: Will Deacon <will.deacon@xxxxxxx>

Will