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arm64: check for upper PAGE_SHIFT bits in pfn_valid()
[firefly-linux-kernel-4.4.55.git]
/
arch
/
arm64
/
mm
/
init.c
diff --git
a/arch/arm64/mm/init.c
b/arch/arm64/mm/init.c
index 17bf39ac83ba073109118817c3ab72346ae3824b..325f89ff897ea8f24a32d361939742294a4aaa19 100644
(file)
--- a/
arch/arm64/mm/init.c
+++ b/
arch/arm64/mm/init.c
@@
-118,9
+118,11
@@
static void __init zone_sizes_init(unsigned long min, unsigned long max)
}
#ifdef CONFIG_HAVE_ARCH_PFN_VALID
}
#ifdef CONFIG_HAVE_ARCH_PFN_VALID
+#define PFN_MASK ((1UL << (64 - PAGE_SHIFT)) - 1)
+
int pfn_valid(unsigned long pfn)
{
int pfn_valid(unsigned long pfn)
{
- return memblock_is_memory(pfn << PAGE_SHIFT);
+ return
(pfn & PFN_MASK) == pfn &&
memblock_is_memory(pfn << PAGE_SHIFT);
}
EXPORT_SYMBOL(pfn_valid);
#endif
}
EXPORT_SYMBOL(pfn_valid);
#endif