From 6af66ec5050bc0a5426192af0429240e8a87e9ca Mon Sep 17 00:00:00 2001 From: "jerry.hoemann@hp.com" Date: Tue, 7 May 2013 10:14:54 -0600 Subject: [PATCH] x86/mm: account for PGDIR_SIZE alignment Patch for 3.0-stable. Function find_early_table_space removed upstream. Fixes panic in alloc_low_page due to pgt_buf overflow during init_memory_mapping. find_early_table_space sizes pgt_buf based upon the size of the memory being mapped, but it does not take into account the alignment of the memory. When the region being mapped spans a 512GB (PGDIR_SIZE) alignment, a panic from alloc_low_pages occurs. kernel_physical_mapping_init takes into account PGDIR_SIZE alignment. This causes an extra call to alloc_low_page to be made. This extra call isn't accounted for by find_early_table_space and causes a kernel panic. Change is to take into account PGDIR_SIZE alignment in find_early_table_space. Signed-off-by: Jerry Hoemann Signed-off-by: Ben Hutchings --- Reading git-format-patch failed