From 280981d6994e0700abd36647b141e73059851e66 Mon Sep 17 00:00:00 2001 From: Sathvika Vasireddy Date: Mon, 14 Nov 2022 23:27:49 +0530 Subject: objtool: Add --mnop as an option to --mcount Some architectures (powerpc) may not support ftrace locations being nop'ed out at build time. Introduce CONFIG_HAVE_OBJTOOL_NOP_MCOUNT for objtool, as a means for architectures to enable nop'ing of ftrace locations. Add --mnop as an option to objtool --mcount, to indicate support for the same. Also, make sure that --mnop can be passed as an option to objtool only when --mcount is passed. Tested-by: Naveen N. Rao Reviewed-by: Naveen N. Rao Acked-by: Josh Poimboeuf Reviewed-by: Christophe Leroy Signed-off-by: Sathvika Vasireddy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20221114175754.1131267-12-sv@linux.ibm.com --- kernel/trace/Kconfig | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'kernel/trace') diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig index e9e95c790b8e..2b782321376a 100644 --- a/kernel/trace/Kconfig +++ b/kernel/trace/Kconfig @@ -82,6 +82,13 @@ config HAVE_OBJTOOL_MCOUNT help Arch supports objtool --mcount +config HAVE_OBJTOOL_NOP_MCOUNT + bool + help + Arch supports the objtool options --mcount with --mnop. + An architecture can select this if it wants to enable nop'ing + of ftrace locations. + config HAVE_C_RECORDMCOUNT bool help -- cgit v1.2.3