[PATCH v5 2/3] arm64: vmlinux.ld: Add mmuoff text and data sections

[Catalin Marinas]

On Mon, Aug 22, 2016 at 06:35:18PM +0100, James Morse wrote:
> diff --git a/arch/arm64/kernel/vmlinux.lds.S b/arch/arm64/kernel/vmlinux.lds.S
> index 659963d40bb4..97c3f36ce30b 100644
> --- a/arch/arm64/kernel/vmlinux.lds.S
> +++ b/arch/arm64/kernel/vmlinux.lds.S
> @@ -120,6 +120,9 @@ SECTIONS
>  			IRQENTRY_TEXT
>  			SOFTIRQENTRY_TEXT
>  			ENTRY_TEXT
> +			__mmuoff_text_start = .;
> +			*(.mmuoff.text)
> +			__mmuoff_text_end = .;
>  			TEXT_TEXT
>  			SCHED_TEXT
>  			LOCK_TEXT
> @@ -185,6 +188,24 @@ SECTIONS
>  	_data = .;
>  	_sdata = .;
>  	RW_DATA_SECTION(L1_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE)
> +
> +	/*
> +	 * Data written with the MMU off but read with the MMU on requires
> +	 * cache lines to be invalidated, discarding up to a Cache Writeback
> +	 * Granule (CWG) of data from the cache. Keep the section that
> +	 * requires this type of maintenance to be in its own Cache Writeback
> +	 * Granule (CWG) area so the cache maintenance operations don't
> +	 * don't interfere with adjacent data.
> +	 */

Nitpick: you have "don't" twice in the comment above.

-- 
Catalin