x86: account overlapped mappings in max_pfn_mapped

When end_pfn is not aligned to 2MB (or 1GB) then the kernel might
map more memory than end_pfn. Account this in max_pfn_mapped.

Signed-off-by: Andi Kleen <ak@suse.de>
Cc: andreas.herrmann3@amd.com
Cc: mingo@elte.hu
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 1 insertions, 1 deletions

diff --git a/arch/x86/kernel/setup_64.c b/arch/x86/kernel/setup_64.c
index 413b8fc31545..3d76dbd9f2c0 100644
--- a/arch/x86/kernel/setup_64.c
+++ b/arch/x86/kernel/setup_64.c
@@ -347,7 +347,7 @@ void __init setup_arch(char **cmdline_p)
 
         check_efer();
 
-        init_memory_mapping(0, (max_pfn_mapped << PAGE_SHIFT));
+        max_pfn_mapped = init_memory_mapping(0, (max_pfn_mapped << PAGE_SHIFT));
         if (efi_enabled)
                 efi_init();