[PATCH-next] arm: fix clang build warning in include/asm/memory.h

[Yipeng Zou]

There is a build error has been founded with build in clang-15.0.4:

./arch/arm/include/asm/memory.h:358:12: error: result of comparison "phys addr_t’ (aka 'unsigned int’) > 4294967295 is always false [-Werror, -Wtautological-type-limit-compare]
                             if (addr > (u32)~0)
                                 ~~~~ ^ ~~~~~~~

It will be always goes fail without CONFIG_PHYS_ADDR_T_64BIT.

Directly silence it by Use CONFIG_PHYS_ADDR_T_64BIT.

Fixes: 981b6714dbd2 ("ARM: provide improved virt_to_idmap() functionality")
Signed-off-by: Yipeng Zou <zouyipeng at huawei.com>
---
 arch/arm/include/asm/memory.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm/include/asm/memory.h b/arch/arm/include/asm/memory.h
index ef2aa79ece5a..64ced9eb42ff 100644
--- a/arch/arm/include/asm/memory.h
+++ b/arch/arm/include/asm/memory.h
@@ -347,14 +347,18 @@ static inline bool arm_has_idmap_alias(void)
 	return IS_ENABLED(CONFIG_MMU) && arch_phys_to_idmap_offset != 0;
 }
 
+#ifdef CONFIG_PHYS_ADDR_T_64BIT
 #define IDMAP_INVALID_ADDR ((u32)~0)
+#endif
 
 static inline unsigned long phys_to_idmap(phys_addr_t addr)
 {
 	if (IS_ENABLED(CONFIG_MMU) && arch_phys_to_idmap_offset) {
 		addr += arch_phys_to_idmap_offset;
+#ifdef CONFIG_PHYS_ADDR_T_64BIT
 		if (addr > (u32)~0)
 			addr = IDMAP_INVALID_ADDR;
+#endif
 	}
 	return addr;
 }
-- 
2.34.1