bpf: BPF_PRELOAD depends on BPF_SYSCALL

Fix build error when BPF_SYSCALL is not set/enabled but BPF_PRELOAD is
by making BPF_PRELOAD depend on BPF_SYSCALL.

ERROR: modpost: "bpf_preload_ops" [kernel/bpf/preload/bpf_preload.ko] undefined!

Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20201105195109.26232-1-rdunlap@infradead.org

diff --git a/kernel/bpf/preload/Kconfig b/kernel/bpf/preload/Kconfig
index ace4911..26bced2 100644 (file)
--- a/kernel/bpf/preload/Kconfig
+++ b/kernel/bpf/preload/Kconfig
@@ -6,6 +6,7 @@ config USERMODE_DRIVER
 menuconfig BPF_PRELOAD
        bool "Preload BPF file system with kernel specific program and map iterators"
        depends on BPF
 menuconfig BPF_PRELOAD
        bool "Preload BPF file system with kernel specific program and map iterators"
        depends on BPF

+       depends on BPF_SYSCALL

        # The dependency on !COMPILE_TEST prevents it from being enabled
        # in allmodconfig or allyesconfig configurations
        depends on !COMPILE_TEST
        # The dependency on !COMPILE_TEST prevents it from being enabled
        # in allmodconfig or allyesconfig configurations
        depends on !COMPILE_TEST