Re: linux-next: Tree for May 12 (arch/x86/net/bpf_jit_comp32.o)

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Hi Randy,

On 5/12/21 8:01 PM, Randy Dunlap wrote:
On 5/12/21 12:56 AM, Stephen Rothwell wrote:
Hi all,

Changes since 20210511:


on i386:

ld: arch/x86/net/bpf_jit_comp32.o: in function `do_jit':
bpf_jit_comp32.c:(.text+0x28c9): undefined reference to `__bpf_call_base'
ld: arch/x86/net/bpf_jit_comp32.o: in function `bpf_int_jit_compile':
bpf_jit_comp32.c:(.text+0x3694): undefined reference to `bpf_jit_blind_constants'
ld: bpf_jit_comp32.c:(.text+0x3719): undefined reference to `bpf_jit_binary_free'
ld: bpf_jit_comp32.c:(.text+0x3745): undefined reference to `bpf_jit_binary_alloc'
ld: bpf_jit_comp32.c:(.text+0x37d3): undefined reference to `bpf_jit_prog_release_other'
ld: kernel/extable.o: in function `search_exception_tables':
extable.c:(.text+0x42): undefined reference to `search_bpf_extables'
ld: kernel/extable.o: in function `kernel_text_address':
extable.c:(.text+0xee): undefined reference to `is_bpf_text_address'
ld: kernel/kallsyms.o: in function `kallsyms_lookup_size_offset':
kallsyms.c:(.text+0x254): undefined reference to `__bpf_address_lookup'
ld: kernel/kallsyms.o: in function `kallsyms_lookup_buildid':
kallsyms.c:(.text+0x2ee): undefined reference to `__bpf_address_lookup'

Thanks for reporting, could you double check the following diff:

diff --git a/kernel/bpf/Kconfig b/kernel/bpf/Kconfig
index 26b591e23f16..bd04f4a44c01 100644
--- a/kernel/bpf/Kconfig
+++ b/kernel/bpf/Kconfig
@@ -37,6 +37,7 @@ config BPF_SYSCALL

 config BPF_JIT
 	bool "Enable BPF Just In Time compiler"
+	depends on BPF
 	depends on HAVE_CBPF_JIT || HAVE_EBPF_JIT
 	depends on MODULES
 	help



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