linux-kernel - [PATCH] riscv: Remove the PER_CPU_OFFSET

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Message-ID: <20251015225604.3860409-1-samuel.holland@sifive.com>
Date: Wed, 15 Oct 2025 15:56:00 -0700
From: Samuel Holland <samuel.holland@...ive.com>
To: Palmer Dabbelt <palmer@...belt.com>,
	Paul Walmsley <pjw@...nel.org>
Cc: linux-riscv@...ts.infradead.org,
	Samuel Holland <samuel.holland@...ive.com>,
	Albert Ou <aou@...s.berkeley.edu>,
	Alexandre Ghiti <alex@...ti.fr>,
	Charlie Jenkins <charlie@...osinc.com>,
	Radim Krčmář <rkrcmar@...tanamicro.com>,
	Thomas Huth <thuth@...hat.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH] riscv: Remove the PER_CPU_OFFSET_SHIFT macro

__per_cpu_offset is an array of unsigned long, so we can reuse the
existing RISCV_LGPTR macro.

Signed-off-by: Samuel Holland <samuel.holland@...ive.com>
---

 arch/riscv/include/asm/asm.h | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/arch/riscv/include/asm/asm.h b/arch/riscv/include/asm/asm.h
index 8bd2a11382a3..ac28066bb564 100644
--- a/arch/riscv/include/asm/asm.h
+++ b/arch/riscv/include/asm/asm.h
@@ -84,15 +84,9 @@
 .endm
 
 #ifdef CONFIG_SMP
-#ifdef CONFIG_32BIT
-#define PER_CPU_OFFSET_SHIFT 2
-#else
-#define PER_CPU_OFFSET_SHIFT 3
-#endif
-
 .macro asm_per_cpu dst sym tmp
 	lw    \tmp, TASK_TI_CPU_NUM(tp)
-	slli  \tmp, \tmp, PER_CPU_OFFSET_SHIFT
+	slli  \tmp, \tmp, RISCV_LGPTR
 	la    \dst, __per_cpu_offset
 	add   \dst, \dst, \tmp
 	REG_L \tmp, 0(\dst)
-- 
2.47.2

base-commit: 5a6f65d1502551f84c158789e5d89299c78907c7
branch: up/percpu-shift