Re: [PATCH v12 01/14] ARM: mm: add missing pud_page define to 2-level page tables
From: Russell King - ARM Linux admin <linux@armlinux.org.uk>
Date: 2021-02-02 12:08:28
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linux-arch, linux-arm-kernel, linuxppc-dev, lkml
On Tue, Feb 02, 2021 at 07:47:04PM +0800, Ding Tianhong wrote:
quoted hunk ↗ jump to hunk
On 2021/2/2 19:13, Russell King - ARM Linux admin wrote:quoted
On Tue, Feb 02, 2021 at 09:05:02PM +1000, Nicholas Piggin wrote:quoted
diff --git a/arch/arm/include/asm/pgtable.h b/arch/arm/include/asm/pgtable.h index c02f24400369..d63a5bb6bd0c 100644 --- a/arch/arm/include/asm/pgtable.h +++ b/arch/arm/include/asm/pgtable.h@@ -166,6 +166,9 @@ extern struct page *empty_zero_page; extern pgd_t swapper_pg_dir[PTRS_PER_PGD]; +#define pud_page(pud) pmd_page(__pmd(pud_val(pud))) +#define pud_write(pud) pmd_write(__pmd(pud_val(pud)))As there is no PUD, does it really make sense to return a valid struct page (which will be the PTE page) for pud_page(), which is several tables above?--- a/arch/arm/include/asm/pgtable-2level.h +++ b/arch/arm/include/asm/pgtable-2level.h +static inline int pud_none(pud_t pud) +{ + return 0; +}I think it could be fix like this.
We already have that. -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last!