Add helper to check maximum possible pfn on x86. Also make the current
phys_addr_valid helper using it internally.
Signed-off-by: Frantisek Hrbata <fhrbata@xxxxxxxxxx>
---
arch/x86/mm/physaddr.h | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/arch/x86/mm/physaddr.h b/arch/x86/mm/physaddr.h
index a3cd5a0..9df8e3a 100644
--- a/arch/x86/mm/physaddr.h
+++ b/arch/x86/mm/physaddr.h
@@ -1,10 +1,15 @@
#include <asm/processor.h>
-static inline int phys_addr_valid(resource_size_t addr)
+static inline int arch_pfn_possible(unsigned long pfn)
{
#ifdef CONFIG_PHYS_ADDR_T_64BIT
- return !(addr >> boot_cpu_data.x86_phys_bits);
+ return !(pfn >> (boot_cpu_data.x86_phys_bits - PAGE_SHIFT));
#else
return 1;
#endif
}
+
+static inline int phys_addr_valid(resource_size_t addr)
+{
+ return arch_pfn_possible(addr >> PAGE_SHIFT);
+}
--
1.9.3
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@xxxxxxxxx. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>