This is a note to let you know that I've just added the patch titled kbuild: Do not clean resolve_btfids if the output does not exist to the 5.11-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: kbuild-do-not-clean-resolve_btfids-if-the-output-doe.patch and it can be found in the queue-5.11 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 186ea9b7b20e75944629ba3170346d666e8d962a Author: Jiri Olsa <jolsa@xxxxxxxxxx> Date: Thu Feb 11 13:40:04 2021 +0100 kbuild: Do not clean resolve_btfids if the output does not exist [ Upstream commit 0e1aa629f1ce9e8cb89e0cefb9e3bfb3dfa94821 ] Nathan reported issue with cleaning empty build directory: $ make -s O=build distclean ../../scripts/Makefile.include:4: *** \ O=/ho...build/tools/bpf/resolve_btfids does not exist. Stop. The problem that tools scripts require existing output directory, otherwise it fails. Adding check around the resolve_btfids clean target to ensure the output directory is in place. Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx> Signed-off-by: Andrii Nakryiko <andrii@xxxxxxxxxx> Tested-by: Nathan Chancellor <nathan@xxxxxxxxxx> Link: https://lore.kernel.org/bpf/20210211124004.1144344-1-jolsa@xxxxxxxxxx Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/Makefile b/Makefile index a135a7b9d265..250b4e58abbc 100644 --- a/Makefile +++ b/Makefile @@ -1084,8 +1084,14 @@ endif PHONY += resolve_btfids_clean +resolve_btfids_O = $(abspath $(objtree))/tools/bpf/resolve_btfids + +# tools/bpf/resolve_btfids directory might not exist +# in output directory, skip its clean in that case resolve_btfids_clean: - $(Q)$(MAKE) -sC $(srctree)/tools/bpf/resolve_btfids O=$(abspath $(objtree))/tools/bpf/resolve_btfids clean +ifneq ($(wildcard $(resolve_btfids_O)),) + $(Q)$(MAKE) -sC $(srctree)/tools/bpf/resolve_btfids O=$(resolve_btfids_O) clean +endif ifdef CONFIG_BPF ifdef CONFIG_DEBUG_INFO_BTF