arm64: mm: Make map_fdt() return mapped pointer

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Currently map_fdt() accepts a physical address and relies on the caller
to keep using the same value after mapping, since the implementation
happens to install an identity mapping. This obscures the fact that the
usable pointer is defined by the mapping, not by the input value. Since
the mapping determines pointer validity, it is more natural to produce
the pointer at mapping time.

Change map_fdt() to return a void * pointing to the mapped FDT. This
clarifies the data flow, removes the implicit identity assumption, and
prepares for making map_fdt() accept a phys_addr_t in a follow-up
change.

Signed-off-by: Sam Edwards <CFSworks@gmail.com>
Signed-off-by: Will Deacon <will@kernel.org>

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Sam Edwards 2025-09-03 17:52:08 -07:00 • committed by Will Deacon

parent 030b3ffbda

commit c56aa9a67a

1 changed files with 7 additions and 6 deletions

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arch/arm64/kernel/pi/map_kernel.c

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