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 <iii@linux.ibm.com>
Reviewed-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Link: https://lore.kernel.org/r/20211012133802.2460757-4-hca@linux.ibm.com
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index ab83c22..620fce1 100644 (file)
--- 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
index b0503ef..501f663 100644 (file)
--- 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