Commit a13e3a5b authored Jun 01, 2016 by Mark Rutland Committed by Will Deacon Jun 03, 2016

arm64: update stale PAGE_OFFSET comment



Commit ab893fb9 ("arm64: introduce KIMAGE_VADDR as the virtual
base of the kernel region") logically split KIMAGE_VADDR from
PAGE_OFFSET, and since commit f9040773 ("arm64: move kernel
image to base of vmalloc area") the two have been distinct values.

Unfortunately, neither commit updated the comment above these
definitions, which now erroneously states that PAGE_OFFSET is the start
of the kernel image rather than the start of the linear mapping.

This patch fixes said comment, and introduces an explanation of
KIMAGE_VADDR.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>

parent 5988a363

arch/arm64/include/asm/memory.h

+2 −1

Original line number	Diff line number	Diff line
		@@ -55,8 +55,9 @@
		#define VMEMMAP_SIZE (UL(1) << (VA_BITS - PAGE_SHIFT - 1 + STRUCT_PAGE_MAX_SHIFT))

		/*
		* PAGE_OFFSET - the virtual address of the start of the kernel image (top
		* PAGE_OFFSET - the virtual address of the start of the linear map (top
		* (VA_BITS - 1))
		* KIMAGE_VADDR - the virtual address of the start of the kernel image
		* VA_BITS - the maximum number of bits for virtual addresses.
		* VA_START - the first kernel virtual address.
		* TASK_SIZE - the maximum size of a user space task.

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