From: Jan Glauber Date: Thu, 6 Dec 2012 13:30:28 +0000 (+0100) Subject: s390/pci: speed up __iowrite64_copy by using pci store block insn X-Git-Tag: omap-for-v3.8/fixes-for-merge-window-v4-signed~29^2~2 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=87bc359b9822a73f264f24f3c1b3e4e7e5ed7d72;p=pandora-kernel.git s390/pci: speed up __iowrite64_copy by using pci store block insn Benefit from pci store block instruction by writing up to 128 bytes with a single instruction to MMIO space. Depending on the workload this can result in a huge performance increase due to the reduced number of instructions. The ordering guarantees of single stores vs. one store block are identical. Signed-off-by: Jan Glauber Signed-off-by: Martin Schwidefsky --- Reading git-diff-tree failed