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If EFI pages are marked as read-only,
we should remove the _PAGE_WRITE flag.
The current code overwrites an unused value.
Fixes: b91540d52a ("RISC-V: Add EFI runtime services")
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Link: https://lore.kernel.org/r/20220528014132.91052-1-heinrich.schuchardt@canonical.com
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>