[PATCH] ARM: Gemini: Add support for PCI BUS

[Russell King - ARM Linux]

On Mon, Nov 29, 2010 at 06:05:07PM +0200, Paulius Zaleckas wrote:
> No he really should NOT use readl/writel. The ONLY difference
> between readl/writel and __raw_readl/__raw_writel is endianess
> conversion. __raw_*l is not doing it. Which to use depend only
> on HW.

Wrong.  readl/writel have barriers too to guarantee ordering between
device accesses and memory accesses.  (device accesses are already
ordered with respect to themselves.)  __raw variants do not
guarantee the relative ordering between memory accesses and device
accesses.