linux-kernel - [PATCH] lib/crc-t10dif: remove crc_t10dif_is

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Message-ID: <20250208175647.12333-1-ebiggers@kernel.org>
Date: Sat,  8 Feb 2025 09:56:47 -0800
From: Eric Biggers <ebiggers@...nel.org>
To: linux-kernel@...r.kernel.org
Cc: linux-crypto@...r.kernel.org,
	Ard Biesheuvel <ardb@...nel.org>,
	Zhihang Shao <zhihang.shao.iscas@...il.com>
Subject: [PATCH] lib/crc-t10dif: remove crc_t10dif_is_optimized()

From: Eric Biggers <ebiggers@...gle.com>

With the "crct10dif" algorithm having been removed from the crypto API,
crc_t10dif_is_optimized() is no longer used.

Signed-off-by: Eric Biggers <ebiggers@...gle.com>
---

This applies to
https://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux.git/log/?h=crc-next

 arch/arm/lib/crc-t10dif-glue.c     | 6 ------
 arch/arm64/lib/crc-t10dif-glue.c   | 6 ------
 arch/powerpc/lib/crc-t10dif-glue.c | 6 ------
 arch/x86/lib/crc-t10dif-glue.c     | 6 ------
 include/linux/crc-t10dif.h         | 9 ---------
 5 files changed, 33 deletions(-)

diff --git a/arch/arm/lib/crc-t10dif-glue.c b/arch/arm/lib/crc-t10dif-glue.c
index d24dee62670e..f3584ba70e57 100644
--- a/arch/arm/lib/crc-t10dif-glue.c
+++ b/arch/arm/lib/crc-t10dif-glue.c
@@ -67,14 +67,8 @@ arch_initcall(crc_t10dif_arm_init);
 static void __exit crc_t10dif_arm_exit(void)
 {
 }
 module_exit(crc_t10dif_arm_exit);
 
-bool crc_t10dif_is_optimized(void)
-{
-	return static_key_enabled(&have_neon);
-}
-EXPORT_SYMBOL(crc_t10dif_is_optimized);
-
 MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@...aro.org>");
 MODULE_DESCRIPTION("Accelerated CRC-T10DIF using ARM NEON and Crypto Extensions");
 MODULE_LICENSE("GPL v2");
diff --git a/arch/arm64/lib/crc-t10dif-glue.c b/arch/arm64/lib/crc-t10dif-glue.c
index dab7e3796232..a007d0c5f3fe 100644
--- a/arch/arm64/lib/crc-t10dif-glue.c
+++ b/arch/arm64/lib/crc-t10dif-glue.c
@@ -68,14 +68,8 @@ arch_initcall(crc_t10dif_arm64_init);
 static void __exit crc_t10dif_arm64_exit(void)
 {
 }
 module_exit(crc_t10dif_arm64_exit);
 
-bool crc_t10dif_is_optimized(void)
-{
-	return static_key_enabled(&have_asimd);
-}
-EXPORT_SYMBOL(crc_t10dif_is_optimized);
-
 MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@...aro.org>");
 MODULE_DESCRIPTION("CRC-T10DIF using arm64 NEON and Crypto Extensions");
 MODULE_LICENSE("GPL v2");
diff --git a/arch/powerpc/lib/crc-t10dif-glue.c b/arch/powerpc/lib/crc-t10dif-glue.c
index 730850dbc51d..f411b0120cc5 100644
--- a/arch/powerpc/lib/crc-t10dif-glue.c
+++ b/arch/powerpc/lib/crc-t10dif-glue.c
@@ -76,14 +76,8 @@ arch_initcall(crc_t10dif_powerpc_init);
 static void __exit crc_t10dif_powerpc_exit(void)
 {
 }
 module_exit(crc_t10dif_powerpc_exit);
 
-bool crc_t10dif_is_optimized(void)
-{
-	return static_key_enabled(&have_vec_crypto);
-}
-EXPORT_SYMBOL(crc_t10dif_is_optimized);
-
 MODULE_AUTHOR("Daniel Axtens <dja@...ens.net>");
 MODULE_DESCRIPTION("CRCT10DIF using vector polynomial multiply-sum instructions");
 MODULE_LICENSE("GPL");
diff --git a/arch/x86/lib/crc-t10dif-glue.c b/arch/x86/lib/crc-t10dif-glue.c
index 13f07ddc9122..7734bdbc2e39 100644
--- a/arch/x86/lib/crc-t10dif-glue.c
+++ b/arch/x86/lib/crc-t10dif-glue.c
@@ -39,13 +39,7 @@ arch_initcall(crc_t10dif_x86_init);
 static void __exit crc_t10dif_x86_exit(void)
 {
 }
 module_exit(crc_t10dif_x86_exit);
 
-bool crc_t10dif_is_optimized(void)
-{
-	return static_key_enabled(&have_pclmulqdq);
-}
-EXPORT_SYMBOL(crc_t10dif_is_optimized);
-
 MODULE_DESCRIPTION("CRC-T10DIF using PCLMULQDQ instructions");
 MODULE_LICENSE("GPL");
diff --git a/include/linux/crc-t10dif.h b/include/linux/crc-t10dif.h
index d0706544fc11..a559fdff3f7e 100644
--- a/include/linux/crc-t10dif.h
+++ b/include/linux/crc-t10dif.h
@@ -17,15 +17,6 @@ static inline u16 crc_t10dif_update(u16 crc, const u8 *p, size_t len)
 static inline u16 crc_t10dif(const u8 *p, size_t len)
 {
 	return crc_t10dif_update(0, p, len);
 }
 
-#if IS_ENABLED(CONFIG_CRC_T10DIF_ARCH)
-bool crc_t10dif_is_optimized(void);
-#else
-static inline bool crc_t10dif_is_optimized(void)
-{
-	return false;
-}
-#endif
-
 #endif

base-commit: 3dceb9c4f1202d2c374976936ef803bf4b076fa7
-- 
2.48.1