Re: [PATCH v7 01/17] arm64: allow late use of early_ioremap

Mark Langsdorf
2015-01-15T18:46:03Z

On 01/14/2015 09:04 AM, Hanjun Guo wrote:
> From: Mark Salter <msalter@redhat.com>
>
> Commit 0e63ea48b4d8 (arm64/efi: add missing call to early_ioremap_reset())
> added a missing call to early_ioremap_reset(). This triggers a BUG if code
> tries using early_ioremap() after the early_ioremap_reset(). This is a
> problem for some ACPI code which needs short-lived temporary mappings
> after paging_init() but before acpi_early_init() in start_kernel(). This
> patch adds definitions for the __late_set_fixmap() and __late_clear_fixmap()
> which avoids the BUG by allowing later use of early_ioremap().
>
> Signed-off-by: Mark Salter <msalter@redhat.com>
> CC: Leif Lindholm <leif.lindholm@linaro.org>
> CC: Ard Biesheuvel <ard.biesheuvel@linaro.org>
> [hj: update the change log]
> Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
> ---
Tested-by: Mark Langsdorf <mlangsdo@redhat.com>