[PATCH 03/12] lib/crypto: chacha: Remove unused function chacha_is_arch_optimized()

[Eric Biggers <ebiggers@kernel.org>]

chacha_is_arch_optimized() is no longer used, so remove it.

Signed-off-by: Eric Biggers <ebiggers@kernel.org>
---
 include/crypto/chacha.h                | 9 ---------
 lib/crypto/arm/chacha-glue.c           | 7 -------
 lib/crypto/arm64/chacha-neon-glue.c    | 6 ------
 lib/crypto/mips/chacha-glue.c          | 6 ------
 lib/crypto/powerpc/chacha-p10-glue.c   | 6 ------
 lib/crypto/riscv/chacha-riscv64-glue.c | 6 ------
 lib/crypto/s390/chacha-glue.c          | 6 ------
 lib/crypto/x86/chacha_glue.c           | 6 ------
 8 files changed, 52 deletions(-)

diff --git a/include/crypto/chacha.h b/include/crypto/chacha.h
index 91f6b4cf561c7..be25a0b65a05f 100644
--- a/include/crypto/chacha.h
+++ b/include/crypto/chacha.h
@@ -117,15 +117,6 @@ static inline void chacha20_crypt(struct chacha_state *state,
 static inline void chacha_zeroize_state(struct chacha_state *state)
 {
 	memzero_explicit(state, sizeof(*state));
 }
 
-#if IS_ENABLED(CONFIG_CRYPTO_ARCH_HAVE_LIB_CHACHA)
-bool chacha_is_arch_optimized(void);
-#else
-static inline bool chacha_is_arch_optimized(void)
-{
-	return false;
-}
-#endif
-
 #endif /* _CRYPTO_CHACHA_H */
diff --git a/lib/crypto/arm/chacha-glue.c b/lib/crypto/arm/chacha-glue.c
index 88ec964152831..67ba045cae359 100644
--- a/lib/crypto/arm/chacha-glue.c
+++ b/lib/crypto/arm/chacha-glue.c
@@ -99,17 +99,10 @@ void chacha_crypt_arch(struct chacha_state *state, u8 *dst, const u8 *src,
 		dst += todo;
 	} while (bytes);
 }
 EXPORT_SYMBOL(chacha_crypt_arch);
 
-bool chacha_is_arch_optimized(void)
-{
-	/* We always can use at least the ARM scalar implementation. */
-	return true;
-}
-EXPORT_SYMBOL(chacha_is_arch_optimized);
-
 static int __init chacha_arm_mod_init(void)
 {
 	if (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && (elf_hwcap & HWCAP_NEON)) {
 		switch (read_cpuid_part()) {
 		case ARM_CPU_PART_CORTEX_A7:
diff --git a/lib/crypto/arm64/chacha-neon-glue.c b/lib/crypto/arm64/chacha-neon-glue.c
index d0188f974ca5c..48097aa34af7c 100644
--- a/lib/crypto/arm64/chacha-neon-glue.c
+++ b/lib/crypto/arm64/chacha-neon-glue.c
@@ -93,16 +93,10 @@ void chacha_crypt_arch(struct chacha_state *state, u8 *dst, const u8 *src,
 		dst += todo;
 	} while (bytes);
 }
 EXPORT_SYMBOL(chacha_crypt_arch);
 
-bool chacha_is_arch_optimized(void)
-{
-	return static_key_enabled(&have_neon);
-}
-EXPORT_SYMBOL(chacha_is_arch_optimized);
-
 static int __init chacha_simd_mod_init(void)
 {
 	if (cpu_have_named_feature(ASIMD))
 		static_branch_enable(&have_neon);
 	return 0;
diff --git a/lib/crypto/mips/chacha-glue.c b/lib/crypto/mips/chacha-glue.c
index 88c097594eb0f..f8390af21dc92 100644
--- a/lib/crypto/mips/chacha-glue.c
+++ b/lib/crypto/mips/chacha-glue.c
@@ -16,14 +16,8 @@ EXPORT_SYMBOL(chacha_crypt_arch);
 
 asmlinkage void hchacha_block_arch(const struct chacha_state *state,
 				   u32 out[HCHACHA_OUT_WORDS], int nrounds);
 EXPORT_SYMBOL(hchacha_block_arch);
 
-bool chacha_is_arch_optimized(void)
-{
-	return true;
-}
-EXPORT_SYMBOL(chacha_is_arch_optimized);
-
 MODULE_DESCRIPTION("ChaCha and HChaCha functions (MIPS optimized)");
 MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
 MODULE_LICENSE("GPL v2");
diff --git a/lib/crypto/powerpc/chacha-p10-glue.c b/lib/crypto/powerpc/chacha-p10-glue.c
index fcd23c6f1590b..5d3d5506d7f94 100644
--- a/lib/crypto/powerpc/chacha-p10-glue.c
+++ b/lib/crypto/powerpc/chacha-p10-glue.c
@@ -74,16 +74,10 @@ void chacha_crypt_arch(struct chacha_state *state, u8 *dst, const u8 *src,
 		dst += todo;
 	} while (bytes);
 }
 EXPORT_SYMBOL(chacha_crypt_arch);
 
-bool chacha_is_arch_optimized(void)
-{
-	return static_key_enabled(&have_p10);
-}
-EXPORT_SYMBOL(chacha_is_arch_optimized);
-
 static int __init chacha_p10_init(void)
 {
 	if (cpu_has_feature(CPU_FTR_ARCH_31))
 		static_branch_enable(&have_p10);
 	return 0;
diff --git a/lib/crypto/riscv/chacha-riscv64-glue.c b/lib/crypto/riscv/chacha-riscv64-glue.c
index 8c3f11d79be31..a15f0aca3fc43 100644
--- a/lib/crypto/riscv/chacha-riscv64-glue.c
+++ b/lib/crypto/riscv/chacha-riscv64-glue.c
@@ -48,16 +48,10 @@ void chacha_crypt_arch(struct chacha_state *state, u8 *dst, const u8 *src,
 	}
 	kernel_vector_end();
 }
 EXPORT_SYMBOL(chacha_crypt_arch);
 
-bool chacha_is_arch_optimized(void)
-{
-	return static_key_enabled(&use_zvkb);
-}
-EXPORT_SYMBOL(chacha_is_arch_optimized);
-
 static int __init riscv64_chacha_mod_init(void)
 {
 	if (riscv_isa_extension_available(NULL, ZVKB) &&
 	    riscv_vector_vlen() >= 128)
 		static_branch_enable(&use_zvkb);
diff --git a/lib/crypto/s390/chacha-glue.c b/lib/crypto/s390/chacha-glue.c
index c57dc851214fa..d8137387fe28f 100644
--- a/lib/crypto/s390/chacha-glue.c
+++ b/lib/crypto/s390/chacha-glue.c
@@ -45,13 +45,7 @@ void chacha_crypt_arch(struct chacha_state *state, u8 *dst, const u8 *src,
 				CHACHA_BLOCK_SIZE;
 	}
 }
 EXPORT_SYMBOL(chacha_crypt_arch);
 
-bool chacha_is_arch_optimized(void)
-{
-	return cpu_has_vx();
-}
-EXPORT_SYMBOL(chacha_is_arch_optimized);
-
 MODULE_DESCRIPTION("ChaCha stream cipher (s390 optimized)");
 MODULE_LICENSE("GPL v2");
diff --git a/lib/crypto/x86/chacha_glue.c b/lib/crypto/x86/chacha_glue.c
index 10b2c945f5412..de7da9d512af2 100644
--- a/lib/crypto/x86/chacha_glue.c
+++ b/lib/crypto/x86/chacha_glue.c
@@ -158,16 +158,10 @@ void chacha_crypt_arch(struct chacha_state *state, u8 *dst, const u8 *src,
 		dst += todo;
 	} while (bytes);
 }
 EXPORT_SYMBOL(chacha_crypt_arch);
 
-bool chacha_is_arch_optimized(void)
-{
-	return static_key_enabled(&chacha_use_simd);
-}
-EXPORT_SYMBOL(chacha_is_arch_optimized);
-
 static int __init chacha_simd_mod_init(void)
 {
 	if (!boot_cpu_has(X86_FEATURE_SSSE3))
 		return 0;
 
-- 
2.50.1