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bpfilter: document build requirements for bpfilter_umh

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It's not intuitively obvious that bpfilter_umh is a statically linked binary.
Mention the toolchain requirement in the Kconfig help, so people
have an easier time figuring out what's needed.

Signed-off-by: Valdis Kletnieks <valdis.kletnieks@vt.edu>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
This commit is contained in:
Valdis Kl ē tnieks 2020-05-09 00:47:19 -04:00 committed by Masahiro Yamada
parent 6ce16f2bc8
commit 9f64fbdb77
1 changed files with 4 additions and 0 deletions
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net/bpfilter/Kconfig
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@ -13,4 +13,8 @@ config BPFILTER_UMH
default m
help
This builds bpfilter kernel module with embedded user mode helper
Note: your toolchain must support building static binaries, since
rootfs isn't mounted at the time when __init functions are called
and do_execv won't be able to find the elf interpreter.
endif