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Re: [PATCH 5/5 v3] ftrace/x86-32: Add -mfentry support to x86_32 with DYNAMIC_FTRACE set

On Thu, Mar 16, 2017 at 04:40:36PM -0400, Steven Rostedt wrote:
> [
>   Fengguang Wu's bot told me that it failed to compile, as ftrace_32.S
>   always gets compiled (as does ftrace_64.S). And the content needs to
>   be protected within the #ifdef.
> ]

Why not instead make their compilation conditional in the Makefile?


obj-$(CONFIG_FUNCTION_TRACER)	+= ftrace_$(bits).o