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OpenCloudOS-Kernel/tools/bpf/runqslower
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Toke Høiland-Jørgensen a835d38d41 tools/bpf/runqslower: Fix override option for VMLINUX_BTF 
The runqslower tool refuses to build without a file to read vmlinux BTF
from. The build fails with an error message to override the location by
setting the VMLINUX_BTF variable if autodetection fails. However, the
Makefile doesn't actually work with that override - the error message is
still emitted.

Fix this by including the value of VMLINUX_BTF in the expansion, and only
emitting the error message if the *result* is empty. Also permit running
'make clean' even though no VMLINUX_BTF is set.

Fixes: 9c01546d26 ("tools/bpf: Add runqslower tool to tools/bpf")
Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/157952560237.1683545.17771785178857224877.stgit@toke.dk
 		2020-01-20 16:37:45 -08:00
..
.gitignore tools/bpf: Add runqslower tool to tools/bpf 2020-01-13 17:48:13 -08:00
Makefile tools/bpf/runqslower: Fix override option for VMLINUX_BTF 2020-01-20 16:37:45 -08:00
runqslower.bpf.c tools/bpf: Add runqslower tool to tools/bpf 2020-01-13 17:48:13 -08:00
runqslower.c tools/bpf: Add runqslower tool to tools/bpf 2020-01-13 17:48:13 -08:00
runqslower.h tools/bpf: Add runqslower tool to tools/bpf 2020-01-13 17:48:13 -08:00