On Wed, 25 Feb 2015 16:39:44 +0800 , Hanjun Guo <[email protected]> wrote: > From: Mark Salter <[email protected]> > > 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 <[email protected]> > CC: Ard Biesheuvel <[email protected]> > Tested-by: Suravee Suthikulpanit <[email protected]> > Tested-by: Mark Langsdorf <[email protected]> > Tested-by: Jon Masters <[email protected]> > Tested-by: Robert Richter <[email protected]> > Acked-by: Robert Richter <[email protected]> > Signed-off-by: Mark Salter <[email protected]> > Signed-off-by: Hanjun Guo <[email protected]>
Reviewed-by: Grant Likely <[email protected]> > --- > arch/arm64/include/asm/fixmap.h | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/arch/arm64/include/asm/fixmap.h b/arch/arm64/include/asm/fixmap.h > index defa0ff9..f196e40 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> > -- > 1.9.1 > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
