samples: add HAVE_SAMPLE_FTRACE_DIRECT config option

Add HAVE_SAMPLE_FTRACE_DIRECT config option which can be selected by architectures which have support for ftrace direct call samples. Acked-by: Ilya Leoshkevich <[email protected]> Reviewed-by: Sven Schnelle <[email protected]> Signed-off-by: Heiko Carstens <[email protected]> Acked-by: Steven Rostedt (VMware) <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Vasily Gorbik <[email protected]>
fracktal · Oct 19, 2021 · c316eb4 · c316eb4
1 parent 3d487ac
commit c316eb4
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diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
@@ -190,6 +190,7 @@ config X86
 	select HAVE_DYNAMIC_FTRACE_WITH_REGS
 	select HAVE_DYNAMIC_FTRACE_WITH_ARGS	if X86_64
 	select HAVE_DYNAMIC_FTRACE_WITH_DIRECT_CALLS
+	select HAVE_SAMPLE_FTRACE_DIRECT	if X86_64
 	select HAVE_EBPF_JIT
 	select HAVE_EFFICIENT_UNALIGNED_ACCESS
 	select HAVE_EISA

diff --git a/samples/Kconfig b/samples/Kconfig
@@ -26,7 +26,7 @@ config SAMPLE_TRACE_PRINTK
 config SAMPLE_FTRACE_DIRECT
 	tristate "Build register_ftrace_direct() example"
 	depends on DYNAMIC_FTRACE_WITH_DIRECT_CALLS && m
-	depends on X86_64 # has x86_64 inlined asm
+	depends on HAVE_SAMPLE_FTRACE_DIRECT
 	help
 	  This builds an ftrace direct function example
 	  that hooks to wake_up_process and prints the parameters.
@@ -224,3 +224,6 @@ config SAMPLE_WATCH_QUEUE
 	  sb_notify() syscalls and the KEYCTL_WATCH_KEY keyctl() function.
 
 endif # SAMPLES
+
+config HAVE_SAMPLE_FTRACE_DIRECT
+	bool