[PATCH] x86-64: Fix partial page check to ensure unusable memory is not being marked...

Fix partial page check in e820_register_active_regions to ensure
partial pages are
not being marked as active in the memory pool.

Signed-off-by: Aaron Durbin <adurbin@google.com>
Signed-off-by: Andi Kleen <ak@suse.de>

diff --git a/arch/x86_64/kernel/e820.c b/arch/x86_64/kernel/e820.c
index a75c829..855b561 100644 (file)
--- a/arch/x86_64/kernel/e820.c
+++ b/arch/x86_64/kernel/e820.c
@@ -278,7 +278,7 @@ e820_register_active_regions(int nid, unsigned long start_pfn,
                                                                >> PAGE_SHIFT;
 
                /* Skip map entries smaller than a page */
                                                                >> PAGE_SHIFT;
 
                /* Skip map entries smaller than a page */

-               if (ei_startpfn > ei_endpfn)
+               if (ei_startpfn >= ei_endpfn)

                        continue;
 
                /* Check if end_pfn_map should be updated */
                        continue;
 
                /* Check if end_pfn_map should be updated */