lib/crypto: chacha: Remove unused function chacha_is_arch_optimized()

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

Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20250827151131.27733-4-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>

8 files changed, 0 insertions, 52 deletions

diff --git a/include/crypto/chacha.h b/include/crypto/chacha.h
index 91f6b4cf561c..be25a0b65a05 100644
--- a/include/crypto/chacha.h
+++ b/include/crypto/chacha.h
@@ -119,13 +119,4 @@ 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 88ec96415283..67ba045cae35 100644
--- a/lib/crypto/arm/chacha-glue.c
+++ b/lib/crypto/arm/chacha-glue.c
@@ -101,13 +101,6 @@ void chacha_crypt_arch(struct chacha_state *state, u8 *dst, const u8 *src,
 }
 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)) {
diff --git a/lib/crypto/arm64/chacha-neon-glue.c b/lib/crypto/arm64/chacha-neon-glue.c
index d0188f974ca5..48097aa34af7 100644
--- a/lib/crypto/arm64/chacha-neon-glue.c
+++ b/lib/crypto/arm64/chacha-neon-glue.c
@@ -95,12 +95,6 @@ void chacha_crypt_arch(struct chacha_state *state, u8 *dst, const u8 *src,
 }
 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))
diff --git a/lib/crypto/mips/chacha-glue.c b/lib/crypto/mips/chacha-glue.c
index 88c097594eb0..f8390af21dc9 100644
--- a/lib/crypto/mips/chacha-glue.c
+++ b/lib/crypto/mips/chacha-glue.c
@@ -18,12 +18,6 @@ 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 fcd23c6f1590..5d3d5506d7f9 100644
--- a/lib/crypto/powerpc/chacha-p10-glue.c
+++ b/lib/crypto/powerpc/chacha-p10-glue.c
@@ -76,12 +76,6 @@ void chacha_crypt_arch(struct chacha_state *state, u8 *dst, const u8 *src,
 }
 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))
diff --git a/lib/crypto/riscv/chacha-riscv64-glue.c b/lib/crypto/riscv/chacha-riscv64-glue.c
index 8c3f11d79be3..a15f0aca3fc4 100644
--- a/lib/crypto/riscv/chacha-riscv64-glue.c
+++ b/lib/crypto/riscv/chacha-riscv64-glue.c
@@ -50,12 +50,6 @@ void chacha_crypt_arch(struct chacha_state *state, u8 *dst, const u8 *src,
 }
 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) &&
diff --git a/lib/crypto/s390/chacha-glue.c b/lib/crypto/s390/chacha-glue.c
index c57dc851214f..d8137387fe28 100644
--- a/lib/crypto/s390/chacha-glue.c
+++ b/lib/crypto/s390/chacha-glue.c
@@ -47,11 +47,5 @@ void chacha_crypt_arch(struct chacha_state *state, u8 *dst, const u8 *src,
 }
 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 10b2c945f541..de7da9d512af 100644
--- a/lib/crypto/x86/chacha_glue.c
+++ b/lib/crypto/x86/chacha_glue.c
@@ -160,12 +160,6 @@ void chacha_crypt_arch(struct chacha_state *state, u8 *dst, const u8 *src,
 }
 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))