linux-kernel - [PATCH -next] crypto: Fix build error when CRYPTO_BLAKE2S_X86=m && CRYPTO_ALGAPI2=m && CONFIG_CRYPTO_MANAGER_EXTRA

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Date:   Tue, 17 May 2022 11:36:30 +0800
From:   gaochao <gaochao49@...wei.com>
To:     <herbert@...dor.apana.org.au>, <davem@...emloft.net>,
        <tglx@...utronix.de>, <mingo@...hat.com>, <bp@...en8.de>,
        <dave.hansen@...ux.intel.com>, <x86@...nel.org>
CC:     <hpa@...or.com>, <ebiggers@...gle.com>,
        <linux-crypto@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH -next] crypto: Fix build error when CRYPTO_BLAKE2S_X86=m && CRYPTO_ALGAPI2=m && CONFIG_CRYPTO_MANAGER_EXTRA_TESTS=y

If CRYPTO=m, CRYPTO_ALGAPI=m, CRYPTO_ALGAPI2=m, CRYPTO_BLAKE2S_X86=m,
CONFIG_CRYPTO_MANAGER_EXTRA_TESTS=y
bulding fails:

arch/x86/crypto/blake2s-glue.o: In function `blake2s_compress':
(.text+0x5a): undefined reference to `crypto_simd_disabled_for_test'
make: *** [vmlinux] Error 1

When CRYPTO_MANAGER_EXTRA_TESTS=y, blake2s_compress will call
crypto_simd_disabled_for_test.
When CRYPTO_ALGAPI2=m, crypto_algapi build as a module,
but if CONFIG_CRYPTO_BLAKE2S_X86=m at the same time,
libblake2s-x86_64.o build with obj-y, this will accuse the above error.

To fix this error:
1 Choose CRYPTO_ALGAPI2 for CRYPTO_BLAKE2S_X86
when CRYPTO_MANAGER_EXTRA_TESTS=y.
2 build libblake2s-x86_64.o as a module when CONFIG_CRYPTO_BLAKE2S_X86=y

Fixes: 8fc5f2ad896b ("crypto: testmgr - Move crypto_simd_disabled_for_test out")
Reported-by: Hulk Robot <hulkci@...wei.com>
Signed-off-by: gaochao <gaochao49@...wei.com>
---
 arch/x86/crypto/Makefile | 2 +-
 crypto/Kconfig           | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/x86/crypto/Makefile b/arch/x86/crypto/Makefile
index 2831685adf6f..54b2469fa49a 100644
--- a/arch/x86/crypto/Makefile
+++ b/arch/x86/crypto/Makefile
@@ -63,7 +63,7 @@ sha512-ssse3-y := sha512-ssse3-asm.o sha512-avx-asm.o sha512-avx2-asm.o sha512_s

 obj-$(CONFIG_CRYPTO_BLAKE2S_X86) += blake2s-x86_64.o
 blake2s-x86_64-y := blake2s-shash.o
-obj-$(if $(CONFIG_CRYPTO_BLAKE2S_X86),y) += libblake2s-x86_64.o
+obj-$(CONFIG_CRYPTO_BLAKE2S_X86) += libblake2s-x86_64.o
 libblake2s-x86_64-y := blake2s-core.o blake2s-glue.o

 obj-$(CONFIG_CRYPTO_GHASH_CLMUL_NI_INTEL) += ghash-clmulni-intel.o
diff --git a/crypto/Kconfig b/crypto/Kconfig
index 19197469cfab..e61598f8f8c5 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -714,6 +714,7 @@ config CRYPTO_BLAKE2S_X86
 	depends on X86 && 64BIT
 	select CRYPTO_LIB_BLAKE2S_GENERIC
 	select CRYPTO_ARCH_HAVE_LIB_BLAKE2S
+	select CRYPTO_ALGAPI2 if CRYPTO_MANAGER_EXTRA_TESTS

 config CRYPTO_CRCT10DIF
 	tristate "CRCT10DIF algorithm"
--
2.17.1