diff options
| author | Mark Salter <msalter@redhat.com> | 2015-03-24 15:02:36 +0100 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2015-03-25 12:49:30 +0100 |
| commit | b2cedba09dd7034c144c03eadc09ee1e4d791590 (patch) | |
| tree | b6e3fb04ae9e3efbcb895d591fa22dd1faac04bb /arch/arm64 | |
| parent | ACPI: add arm64 to the platforms that use ioremap (diff) | |
| download | linux-b2cedba09dd7034c144c03eadc09ee1e4d791590.tar.xz linux-b2cedba09dd7034c144c03eadc09ee1e4d791590.zip | |
ARM64: allow late use of early_ioremap
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().
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>
Diffstat (limited to 'arch/arm64')
| -rw-r--r-- | arch/arm64/include/asm/fixmap.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/fixmap.h b/arch/arm64/include/asm/fixmap.h index defa0ff98250..f196e408a35c 100644 --- a/arch/arm64/include/asm/fixmap.h +++ b/arch/arm64/include/asm/fixmap.h @@ -62,6 +62,9 @@ void __init early_fixmap_init(void); #define __early_set_fixmap __set_fixmap +#define __late_set_fixmap __set_fixmap +#define __late_clear_fixmap(idx) __set_fixmap((idx), 0, FIXMAP_PAGE_CLEAR) + extern void __set_fixmap(enum fixed_addresses idx, phys_addr_t phys, pgprot_t prot); #include <asm-generic/fixmap.h> |