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Message-Id: <20240313103334.4036554-1-xiao.w.wang@intel.com>
Date: Wed, 13 Mar 2024 18:33:34 +0800
From: Xiao Wang <xiao.w.wang@...el.com>
To: paul.walmsley@...ive.com,
palmer@...belt.com,
aou@...s.berkeley.edu
Cc: jerry.shih@...ive.com,
nick.knight@...ive.com,
ajones@...tanamicro.com,
bjorn@...osinc.com,
andy.chiu@...ive.com,
viro@...iv.linux.org.uk,
cleger@...osinc.com,
alexghiti@...osinc.com,
haicheng.li@...el.com,
akira.tsukamoto@...il.com,
linux-riscv@...ts.infradead.org,
linux-kernel@...r.kernel.org,
Xiao Wang <xiao.w.wang@...el.com>
Subject: [PATCH] riscv: uaccess: Allow the last potential unrolled copy
When the dst buffer pointer points to the last accessible aligned addr, we
could still run another iteration of unrolled copy.
Signed-off-by: Xiao Wang <xiao.w.wang@...el.com>
---
arch/riscv/lib/uaccess.S | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/riscv/lib/uaccess.S b/arch/riscv/lib/uaccess.S
index 2e665f8f8fcc..1399d797d81b 100644
--- a/arch/riscv/lib/uaccess.S
+++ b/arch/riscv/lib/uaccess.S
@@ -103,7 +103,7 @@ SYM_FUNC_START(fallback_scalar_usercopy)
fixup REG_S t4, 7*SZREG(a0), 10f
addi a0, a0, 8*SZREG
addi a1, a1, 8*SZREG
- bltu a0, t0, 2b
+ bleu a0, t0, 2b
addi t0, t0, 8*SZREG /* revert to original value */
j .Lbyte_copy_tail
--
2.25.1
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