[PATCH 5.16 0965/1017] arm64: mm: Drop const from conditional arm64_dma_phys_limit definition

[Greg Kroah-Hartman]

From: Will Deacon <will@xxxxxxxxxx>

commit 770093459b9b333380aa71f2c31c60b14895c1df upstream.

Commit 031495635b46 ("arm64: Do not defer reserve_crashkernel() for
platforms with no DMA memory zones") introduced different definitions
for 'arm64_dma_phys_limit' depending on CONFIG_ZONE_DMA{,32} based on
a late suggestion from Pasha. Sadly, this results in a build error when
passing W=1:

  | arch/arm64/mm/init.c:90:19: error: conflicting type qualifiers for 'arm64_dma_phys_limit'

Drop the 'const' for now and use '__ro_after_init' consistently.

Link: https://lore.kernel.org/r/202203090241.aj7paWeX-lkp@xxxxxxxxx
Link: https://lore.kernel.org/r/CA+CK2bDbbx=8R=UthkMesWOST8eJMtOGJdfMRTFSwVmo0Vn0EA@xxxxxxxxxxxxxx
Fixes: 031495635b46 ("arm64: Do not defer reserve_crashkernel() for platforms with no DMA memory zones")
Signed-off-by: Will Deacon <will@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 arch/arm64/mm/init.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/arm64/mm/init.c
+++ b/arch/arm64/mm/init.c
@@ -87,7 +87,7 @@ EXPORT_SYMBOL(memstart_addr);
 #if IS_ENABLED(CONFIG_ZONE_DMA) || IS_ENABLED(CONFIG_ZONE_DMA32)
 phys_addr_t __ro_after_init arm64_dma_phys_limit;
 #else
-const phys_addr_t arm64_dma_phys_limit = PHYS_MASK + 1;
+phys_addr_t __ro_after_init arm64_dma_phys_limit = PHYS_MASK + 1;
 #endif
 
 #ifdef CONFIG_KEXEC_CORE