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* Reference to non-existing DYNAMIC_FTRACE_WITH_ARGS
@ 2021-08-06 10:18 Lukas Bulwahn
  2021-08-06 13:22 ` Steven Rostedt
  0 siblings, 1 reply; 2+ messages in thread
From: Lukas Bulwahn @ 2021-08-06 10:18 UTC (permalink / raw)
  To: Steven Rostedt (VMware)
  Cc: live-patching, Linux Kernel Mailing List, Ingo Molnar,
	Josh Poimboeuf, Petr Mladek, Joe Lawrence, Jiri Kosina,
	Miroslav Benes, kernel-janitors

Hi Steven,

Commit 2860cd8a2353 ("livepatch: Use the default ftrace_ops instead of
REGS when ARGS is available") adds a dependency on a non-existing
config DYNAMIC_FTRACE_WITH_ARGS, see diff:

diff --git a/kernel/livepatch/Kconfig b/kernel/livepatch/Kconfig
index 54102deb50ba..53d51ed619a3 100644
--- a/kernel/livepatch/Kconfig
+++ b/kernel/livepatch/Kconfig
@@ -6,7 +6,7 @@ config HAVE_LIVEPATCH

 config LIVEPATCH
        bool "Kernel Live Patching"
-       depends on DYNAMIC_FTRACE_WITH_REGS
+       depends on DYNAMIC_FTRACE_WITH_REGS || DYNAMIC_FTRACE_WITH_ARGS
        depends on MODULES
        depends on SYSFS
        depends on KALLSYMS_ALL


Did you intend to depend on the existing "HAVE_DYNAMIC_FTRACE_WITH_ARGS" here?

Or did you intend to add a new config DYNAMIC_FTRACE_WITH_ARGS
analogously to DYNAMIC_FTRACE_WITH_REGS as defined in
./kernel/trace/Kconfig (see below)?

config DYNAMIC_FTRACE_WITH_REGS
        def_bool y
        depends on DYNAMIC_FTRACE
        depends on HAVE_DYNAMIC_FTRACE_WITH_REGS

I am happy to provide a patch, once I understand what was intended here.

Lukas

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