linux-kernel - [PATCH 3/4] raid6: riscv: Allow code to be compiled in userspace

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Message-Id: <20250610101234.1100660-4-zhangchunyan@iscas.ac.cn>
Date: Tue, 10 Jun 2025 18:12:33 +0800
From: Chunyan Zhang <zhangchunyan@...as.ac.cn>
To: Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>,
	Alexandre Ghiti <alex@...ti.fr>,
	Charlie Jenkins <charlie@...osinc.com>,
	Song Liu <song@...nel.org>,
	Yu Kuai <yukuai3@...wei.com>
Cc: linux-riscv@...ts.infradead.org,
	linux-raid@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Chunyan Zhang <zhang.lyra@...il.com>
Subject: [PATCH 3/4] raid6: riscv: Allow code to be compiled in userspace

To support userspace raid6test, this patch adds __KERNEL__ ifdef for kernel
header inclusions also userspace wrapper definitions to allow code to be
compiled in userspace.

Signed-off-by: Chunyan Zhang <zhangchunyan@...as.ac.cn>
---
 lib/raid6/recov_rvv.c |  7 +------
 lib/raid6/rvv.c       | 11 ++++-------
 lib/raid6/rvv.h       | 15 +++++++++++++++
 3 files changed, 20 insertions(+), 13 deletions(-)

diff --git a/lib/raid6/recov_rvv.c b/lib/raid6/recov_rvv.c
index 500da521a806..8f2be833c015 100644
--- a/lib/raid6/recov_rvv.c
+++ b/lib/raid6/recov_rvv.c
@@ -4,13 +4,8 @@
  * Author: Chunyan Zhang <zhangchunyan@...as.ac.cn>
  */
 
-#include <asm/vector.h>
 #include <linux/raid/pq.h>
-
-static int rvv_has_vector(void)
-{
-	return has_vector();
-}
+#include "rvv.h"
 
 static void __raid6_2data_recov_rvv(int bytes, u8 *p, u8 *q, u8 *dp,
 				    u8 *dq, const u8 *pbmul,
diff --git a/lib/raid6/rvv.c b/lib/raid6/rvv.c
index b193ea176d5d..99dfa16d37c7 100644
--- a/lib/raid6/rvv.c
+++ b/lib/raid6/rvv.c
@@ -9,16 +9,13 @@
  *	Copyright 2002-2004 H. Peter Anvin
  */
 
-#include <asm/vector.h>
-#include <linux/raid/pq.h>
 #include "rvv.h"
 
+#ifdef __KERNEL__
 #define NSIZE	(riscv_v_vsize / 32) /* NSIZE = vlenb */
-
-static int rvv_has_vector(void)
-{
-	return has_vector();
-}
+#else
+#define NSIZE  16
+#endif
 
 static void raid6_rvv1_gen_syndrome_real(int disks, unsigned long bytes, void **ptrs)
 {
diff --git a/lib/raid6/rvv.h b/lib/raid6/rvv.h
index 94044a1b707b..595dfbf95d4e 100644
--- a/lib/raid6/rvv.h
+++ b/lib/raid6/rvv.h
@@ -7,6 +7,21 @@
  * Definitions for RISC-V RAID-6 code
  */
 
+#ifdef __KERNEL__
+#include <asm/vector.h>
+#else
+#define kernel_vector_begin()
+#define kernel_vector_end()
+#define has_vector()		(1)
+#endif
+
+#include <linux/raid/pq.h>
+
+static int rvv_has_vector(void)
+{
+	return has_vector();
+}
+
 #define RAID6_RVV_WRAPPER(_n)						\
 	static void raid6_rvv ## _n ## _gen_syndrome(int disks,		\
 					size_t bytes, void **ptrs)	\
-- 
2.34.1