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hc

2024-02-20 ea08eeccae9297f7aabd2ef7f0c2517ac4549acc

 kernel/net/bpfilter/Kconfig
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@@ -1,6 +1,8 @@
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+# SPDX-License-Identifier: GPL-2.0-only
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 menuconfig BPFILTER
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 	bool "BPF based packet filtering framework (BPFILTER)"
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 	depends on NET && BPF && INET
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+	select USERMODE_DRIVER
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 	help
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 	  This builds experimental bpfilter framework that is aiming to
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 	  provide netfilter compatible functionality via BPF
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@@ -8,8 +10,14 @@
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 if BPFILTER
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 config BPFILTER_UMH
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 	tristate "bpfilter kernel module with user mode helper"
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-	depends on $(success,$(srctree)/scripts/cc-can-link.sh $(CC))
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+	depends on CC_CAN_LINK
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+	depends on m || CC_CAN_LINK_STATIC
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 	default m
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 	help
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 	  This builds bpfilter kernel module with embedded user mode helper
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+
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+	  Note: To compile this as built-in, your toolchain must support
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+	  building static binaries, since rootfs isn't mounted at the time
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+	  when __init functions are called and do_execv won't be able to find
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+	  the elf interpreter.
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 endif