From: Thierry Reding <redacted>

Changes introduced in the upstream version of libfdt pulled in by commit
91feabc2e224 ("scripts/dtc: Update to upstream commit b06e55c88b9b") use
the strnlen() function, which isn't currently available to the EFI name-
space. Add it to the EFI namespace to avoid a linker error.

Cc: Ard Biesheuvel <redacted>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <redacted>
Cc: Rob Herring <robh@kernel.org>
Signed-off-by: Thierry Reding <redacted>
---
 arch/arm64/kernel/image.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/kernel/image.h b/arch/arm64/kernel/image.h
index c9c62cab25a4..8a1978f4a555 100644
--- a/arch/arm64/kernel/image.h
+++ b/arch/arm64/kernel/image.h

@@ -96,6 +96,8 @@ __efistub_strcmp		= KALLSYMS_HIDE(__pi_strcmp);
 __efistub_strncmp		= KALLSYMS_HIDE(__pi_strncmp);
 __efistub___flush_dcache_area	= KALLSYMS_HIDE(__pi___flush_dcache_area);
 
+__efistub_strnlen		= KALLSYMS_HIDE(strnlen);
+
 #ifdef CONFIG_KASAN
 __efistub___memcpy		= KALLSYMS_HIDE(__pi_memcpy);
 __efistub___memmove		= KALLSYMS_HIDE(__pi_memmove);

-- 
2.7.1