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riscv: pgtable: Fixup comment for KERN_VIRT_SIZE

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

Fixes: f7ae02333d ("riscv: Move KASAN mapping next to the kernel mapping")
Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Signed-off-by: Guo Ren <guoren@kernel.org>
Cc: Alexandre Ghiti <alexandre.ghiti@canonical.com>
Reviewed-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Link: https://lore.kernel.org/r/20230110080419.931185-1-guoren@kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
This commit is contained in:
Guo Ren 2023-01-10 03:04:19 -05:00 committed by Palmer Dabbelt
parent 61a9b71290
commit 6be1ff430d
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1 changed files with 1 additions and 1 deletions
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2
arch/riscv/include/asm/pgtable.h
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@ -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)