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[PATCH] ARM: mmu: Declare section start/end correctly

From: Linus Walleij <hidden>
Date: 2021-06-17 10:05:49
Subsystem: arm port, the rest · Maintainers: Russell King, Linus Torvalds

The kernel test robot reported an interesting bug:

A debug print was using %08x with kernel_sec_start and kernel_sec_end being
phys_addr_t which can be either u32 or u64 (possibly more).

Actually these should just be declared as u32 to begin with: they are declared
as such in the assembly in head.S and the kernel definately boots in a 32 bit
physical address space. Redeclare the kernel_sec_start and kernel_sec_end
to rid the bug.

Reported-by: kernel test robot <redacted>
Fixes: 6e121df14ccd ("ARM: 9090/1: Map the lowmem and kernel separately")
Signed-off-by: Linus Walleij <redacted>
---
 arch/arm/include/asm/memory.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/arm/include/asm/memory.h b/arch/arm/include/asm/memory.h
index ca213d7d095f..cfc9dfd70aad 100644
--- a/arch/arm/include/asm/memory.h
+++ b/arch/arm/include/asm/memory.h
@@ -162,8 +162,8 @@ extern unsigned long vectors_base;
  * Physical start and end address of the kernel sections. These addresses are
  * 2MB-aligned to match the section mappings placed over the kernel.
  */
-extern phys_addr_t kernel_sec_start;
-extern phys_addr_t kernel_sec_end;
+extern u32 kernel_sec_start;
+extern u32 kernel_sec_end;
 
 /*
  * Physical vs virtual RAM address space conversion.  These are
-- 
2.31.1


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