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authorJakub Kicinski <jakub.kicinski@netronome.com>2019-06-07 19:11:16 +0200
committerAlexei Starovoitov <ast@kernel.org>2019-06-11 08:37:20 +0200
commit0ed3cc4abc10dc71f67a40e0c4b2c5c85e6aec82 (patch)
treea813b11c1f53e77e3de330c93443fdeb148b0389 /samples
parentMerge branch 'xskmap-lookup' (diff)
downloadlinux-0ed3cc4abc10dc71f67a40e0c4b2c5c85e6aec82.tar.xz
linux-0ed3cc4abc10dc71f67a40e0c4b2c5c85e6aec82.zip
samples: bpf: don't run probes at the local make stage
Quentin reports that commit 07c3bbdb1a9b ("samples: bpf: print a warning about headers_install") is producing the false positive when make is invoked locally, from the samples/bpf/ directory. When make is run locally it hits the "all" target, which will recursively invoke make through the full build system. Speed up the "local" run which doesn't actually build anything, and avoid false positives by skipping all the probes if not in kbuild environment (cover both the new warning and the BTF probes). Reported-by: Quentin Monnet <quentin.monnet@netronome.com> Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'samples')
-rw-r--r--samples/bpf/Makefile3
1 files changed, 3 insertions, 0 deletions
diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile
index 4074a66a70ca..9eb5d733f575 100644
--- a/samples/bpf/Makefile
+++ b/samples/bpf/Makefile
@@ -206,6 +206,8 @@ HOSTCC = $(CROSS_COMPILE)gcc
CLANG_ARCH_ARGS = -target $(ARCH)
endif
+# Don't evaluate probes and warnings if we need to run make recursively
+ifneq ($(src),)
HDR_PROBE := $(shell echo "\#include <linux/types.h>\n struct list_head { int a; }; int main() { return 0; }" | \
$(HOSTCC) $(KBUILD_HOSTCFLAGS) -x c - -o /dev/null 2>/dev/null && \
echo okay)
@@ -232,6 +234,7 @@ ifneq ($(and $(BTF_LLC_PROBE),$(BTF_PAHOLE_PROBE),$(BTF_OBJCOPY_PROBE)),)
DWARF2BTF = y
endif
endif
+endif
# Trick to allow make to be run from this directory
all: