From: jerry.hoemann@hp.com Date: Tue, 7 May 2013 16:14:54 +0000 (-0600) Subject: x86/mm: account for PGDIR_SIZE alignment X-Git-Tag: v3.2.45~1 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6af66ec5050bc0a5426192af0429240e8a87e9ca;p=pandora-kernel.git 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-diff-tree failed