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authorHsin-Yi Wang <hsinyi@chromium.org>2019-08-23 14:24:50 +0800
committerWill Deacon <will@kernel.org>2019-08-23 16:39:16 +0100
commite112b032a72c78f15d0c803c5dc6be444c2e6c66 (patch)
tree1356af931f59efe60649b3ab929fe822ebfe3e5b /arch/arm64/mm
parente21a712a9685488f5ce80495b37b9fdbe96c230d (diff)
arm64: map FDT as RW for early_init_dt_scan()
Currently in arm64, FDT is mapped to RO before it's passed to early_init_dt_scan(). However, there might be some codes (eg. commit "fdt: add support for rng-seed") that need to modify FDT during init. Map FDT to RO after early fixups are done. Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org> Reviewed-by: Stephen Boyd <swboyd@chromium.org> Reviewed-by: Mike Rapoport <rppt@linux.ibm.com> Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'arch/arm64/mm')
-rw-r--r--arch/arm64/mm/mmu.c15
1 files changed, 1 insertions, 14 deletions
diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
index 750a69dde39b..54e93583085c 100644
--- a/arch/arm64/mm/mmu.c
+++ b/arch/arm64/mm/mmu.c
@@ -876,7 +876,7 @@ void __set_fixmap(enum fixed_addresses idx,
}
}
-void *__init __fixmap_remap_fdt(phys_addr_t dt_phys, int *size, pgprot_t prot)
+void *__init fixmap_remap_fdt(phys_addr_t dt_phys, int *size, pgprot_t prot)
{
const u64 dt_virt_base = __fix_to_virt(FIX_FDT);
int offset;
@@ -929,19 +929,6 @@ void *__init __fixmap_remap_fdt(phys_addr_t dt_phys, int *size, pgprot_t prot)
return dt_virt;
}
-void *__init fixmap_remap_fdt(phys_addr_t dt_phys)
-{
- void *dt_virt;
- int size;
-
- dt_virt = __fixmap_remap_fdt(dt_phys, &size, PAGE_KERNEL_RO);
- if (!dt_virt)
- return NULL;
-
- memblock_reserve(dt_phys, size);
- return dt_virt;
-}
-
int __init arch_ioremap_p4d_supported(void)
{
return 0;