Commit 2532f849 authored by Alexei Starovoitov's avatar Alexei Starovoitov
Browse files

bpf: Disallow BPF_PRELOAD in allmodconfig builds 



The CC_CAN_LINK checks that the host compiler can link, but bpf_preload
relies on libbpf which in turn needs libelf to be present during linking.
allmodconfig runs in odd setups with cross compilers and missing host
libraries like libelf. Instead of extending kconfig with every possible
library that bpf_preload might need disallow building BPF_PRELOAD in
such build-only configurations.

Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent cd324d7a

kernel/bpf/preload/Kconfig

+3 −0
Original line number Diff line number Diff line
@@ -6,6 +6,9 @@ config USERMODE_DRIVER 
menuconfig BPF_PRELOAD

	bool "Preload BPF file system with kernel specific program and map iterators"

	depends on BPF

	# The dependency on !COMPILE_TEST prevents it from being enabled

	# in allmodconfig or allyesconfig configurations

	depends on !COMPILE_TEST

	select USERMODE_DRIVER

	help

	  This builds kernel module with several embedded BPF programs that are