From: zhenzhong.duan Date: Wed, 30 May 2012 04:52:15 +0000 (+0800) Subject: x86, mtrr: Fix a type overflow in range_to_mtrr func X-Git-Tag: v3.5-rc1~32^2~1 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2da06af8106f8f35318bb084baf8448797ef058a;p=pandora-kernel.git x86, mtrr: Fix a type overflow in range_to_mtrr func When boot on sun G5+ with 4T mem, see an overflow in mtrr cleanup as below. *BAD*gran_size: 2G chunk_size: 2G num_reg: 10 lose cover RAM: -18014398505283592M This is because 1<<31 sign extended. Use an unsigned long constant to fix it. Useful for mem larger than or equal to 4T. -v2: Use 64bit constant instead of explicit type conversion as suggested by Yinghai. Description updated too. Signed-off-by: Zhenzhong Duan Link: http://lkml.kernel.org/r/4FC5A77F.6060505@oracle.com Signed-off-by: H. Peter Anvin --- Reading git-diff-tree failed