linux-kernel - [PATCH] riscv: pgtable: Fixup comment for KERN_VIRT

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Message-Id: <20230110080419.931185-1-guoren@kernel.org>
Date:   Tue, 10 Jan 2023 03:04:19 -0500
From:   guoren@...nel.org
To:     guoren@...nel.org, alexandre.ghiti@...onical.com,
        palmer@...belt.com
Cc:     linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Guo Ren <guoren@...ux.alibaba.com>
Subject: [PATCH] riscv: pgtable: Fixup comment for KERN_VIRT_SIZE

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

KERN_VIRT_SIZE is 1/4 of the entries of the page global directory,
not half.

Fixes: f7ae02333d13 ("riscv: Move KASAN mapping next to the kernel mapping")
Signed-off-by: Guo Ren <guoren@...ux.alibaba.com>
Signed-off-by: Guo Ren <guoren@...nel.org>
Cc: Alexandre Ghiti <alexandre.ghiti@...onical.com>
---
 arch/riscv/include/asm/pgtable.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h
index 4eba9a98d0e3..2a88362dffa5 100644
--- a/arch/riscv/include/asm/pgtable.h
+++ b/arch/riscv/include/asm/pgtable.h
@@ -31,7 +31,7 @@
 #define PTRS_PER_PTE    (PAGE_SIZE / sizeof(pte_t))
 
 /*
- * Half of the kernel address space (half of the entries of the page global
+ * Half of the kernel address space (1/4 of the entries of the page global
  * directory) is for the direct mapping.
  */
 #define KERN_VIRT_SIZE          ((PTRS_PER_PGD / 2 * PGDIR_SIZE) / 2)
-- 
2.36.1