linux-kernel - [PATCH 05/10] byteorder: Add le64_to_cpu_array() and cpu_to_le64

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Message-ID: <20251018043106.375964-6-ebiggers@kernel.org>
Date: Fri, 17 Oct 2025 21:31:01 -0700
From: Eric Biggers <ebiggers@...nel.org>
To: linux-crypto@...r.kernel.org
Cc: linux-kernel@...r.kernel.org,
	linux-btrfs@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	Ard Biesheuvel <ardb@...nel.org>,
	"Jason A . Donenfeld" <Jason@...c4.com>,
	Eric Biggers <ebiggers@...nel.org>
Subject: [PATCH 05/10] byteorder: Add le64_to_cpu_array() and cpu_to_le64_array()

Add le64_to_cpu_array() and cpu_to_le64_array().  These mirror the
corresponding 32-bit functions.

These will be used by the BLAKE2b code.

Signed-off-by: Eric Biggers <ebiggers@...nel.org>
---
 include/linux/byteorder/generic.h | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/include/linux/byteorder/generic.h b/include/linux/byteorder/generic.h
index b3705e8bbe2b8..55a44199de872 100644
--- a/include/linux/byteorder/generic.h
+++ b/include/linux/byteorder/generic.h
@@ -171,10 +171,26 @@ static inline void cpu_to_le32_array(u32 *buf, unsigned int words)
 		__cpu_to_le32s(buf);
 		buf++;
 	}
 }
 
+static inline void le64_to_cpu_array(u64 *buf, unsigned int words)
+{
+	while (words--) {
+		__le64_to_cpus(buf);
+		buf++;
+	}
+}
+
+static inline void cpu_to_le64_array(u64 *buf, unsigned int words)
+{
+	while (words--) {
+		__cpu_to_le64s(buf);
+		buf++;
+	}
+}
+
 static inline void memcpy_from_le32(u32 *dst, const __le32 *src, size_t words)
 {
 	size_t i;
 
 	for (i = 0; i < words; i++)
-- 
2.51.1.dirty