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Mark Salter authored
Commit 0e63ea48 (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(). CC: Leif Lindholm <leif.lindholm@linaro.org> CC: Ard Biesheuvel <ard.biesheuvel@linaro.org> Tested-by:
Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> Tested-by:
Mark Langsdorf <mlangsdo@redhat.com> Tested-by:
Jon Masters <jcm@redhat.com> Tested-by:
Robert Richter <rrichter@cavium.com> Tested-by:
Timur Tabi <timur@codeaurora.org> Acked-by:
Robert Richter <rrichter@cavium.com> Reviewed-by:
Grant Likely <grant.likely@linaro.org> Signed-off-by:
Mark Salter <msalter@redhat.com> Signed-off-by:
Hanjun Guo <hanjun.guo@linaro.org> Signed-off-by:
Will Deacon <will.deacon@arm.com>
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