Re: [PATCH v3 18/26] arm64: Introduce asm/vdso/processor.h
From: Catalin Marinas <catalin.marinas@arm.com>
Date: 2020-03-15 18:30:17
Also in:
linux-arch, linux-mips, lkml
On Fri, Mar 13, 2020 at 03:43:37PM +0000, Vincenzo Frascino wrote:
quoted hunk ↗ jump to hunk
--- /dev/null +++ b/arch/arm64/include/asm/vdso/processor.h@@ -0,0 +1,31 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (C) 2020 ARM Ltd. + */ +#ifndef __ASM_VDSO_PROCESSOR_H +#define __ASM_VDSO_PROCESSOR_H + +#ifndef __ASSEMBLY__ + +#include <asm/page-def.h> + +#ifdef CONFIG_COMPAT +#if defined(CONFIG_ARM64_64K_PAGES) && defined(CONFIG_KUSER_HELPERS) +/* + * With CONFIG_ARM64_64K_PAGES enabled, the last page is occupied + * by the compat vectors page. + */ +#define TASK_SIZE_32 UL(0x100000000) +#else +#define TASK_SIZE_32 (UL(0x100000000) - PAGE_SIZE) +#endif /* CONFIG_ARM64_64K_PAGES */ +#endif /* CONFIG_COMPAT */
Just curious, what's TASK_SIZE_32 used for in the vDSO code? You don't seem to move TASK_SIZE. -- Catalin _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel