From: Will Deacon Date: Thu, 2 May 2013 12:52:01 +0000 (+0100) Subject: ARM: lpae: fix definition of PTE_HWTABLE_PTRS X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=e38a517578d6c0f764b0d0f6e26dcdf9f70c69d7;p=openwrt%2Fstaging%2Fblogic.git ARM: lpae: fix definition of PTE_HWTABLE_PTRS For 2-level page tables, PTE_HWTABLE_PTRS describes the offset between Linux PTEs and hardware PTEs. On LPAE, there is no distinction (since we have 64-bit descriptors with plenty of space) so PTE_HWTABLE_PTRS should be 0. Unfortunately, it is wrongly defined as PTRS_PER_PTE, meaning that current pte table flushing is off by a page. Luckily, all current LPAE implementations are SMP, so the hardware walker can snoop L1. This patch fixes the broken definition. Acked-by: Catalin Marinas Signed-off-by: Will Deacon --- diff --git a/arch/arm/include/asm/pgtable-3level.h b/arch/arm/include/asm/pgtable-3level.h index 5b85b218b0f0..d03c589cf6b5 100644 --- a/arch/arm/include/asm/pgtable-3level.h +++ b/arch/arm/include/asm/pgtable-3level.h @@ -33,7 +33,7 @@ #define PTRS_PER_PMD 512 #define PTRS_PER_PGD 4 -#define PTE_HWTABLE_PTRS (PTRS_PER_PTE) +#define PTE_HWTABLE_PTRS (0) #define PTE_HWTABLE_OFF (0) #define PTE_HWTABLE_SIZE (PTRS_PER_PTE * sizeof(u64))