linux-kernel - [PATCH 2/3] riscv: Fixup PAGE

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Date:   Mon, 24 May 2021 06:51:07 +0000
From:   guoren@...nel.org
To:     guoren@...nel.org, anup.patel@....com, palmerdabbelt@...gle.com,
        arnd@...db.de
Cc:     linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-arch@...r.kernel.org, linux-sunxi@...ts.linux.dev,
        Guo Ren <guoren@...ux.alibaba.com>
Subject: [PATCH 2/3] riscv: Fixup PAGE_UP in asm/page.h

From: Guo Ren <guoren@...ux.alibaba.com>

Current PAGE_UP implementation is wrong. PAGE_UP(0) should be
0x1000, but current implementation will give out 0.

Although the current PAGE_UP isn't used, it will soon be used in
tlb_flush optimization.

Signed-off-by: Guo Ren <guoren@...ux.alibaba.com>
Cc: Anup Patel <anup.patel@....com>
Cc: Palmer Dabbelt <palmerdabbelt@...gle.com>
---
 arch/riscv/include/asm/page.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/riscv/include/asm/page.h b/arch/riscv/include/asm/page.h
index 6a7761c..c611b20 100644
--- a/arch/riscv/include/asm/page.h
+++ b/arch/riscv/include/asm/page.h
@@ -37,7 +37,7 @@
 
 #ifndef __ASSEMBLY__
 
-#define PAGE_UP(addr)	(((addr)+((PAGE_SIZE)-1))&(~((PAGE_SIZE)-1)))
+#define PAGE_UP(addr)	(((addr)+(PAGE_SIZE))&(~((PAGE_SIZE)-1)))
 #define PAGE_DOWN(addr)	((addr)&(~((PAGE_SIZE)-1)))
 
 /* align addr on a size boundary - adjust address up/down if needed */
-- 
2.7.4