On Thursday 03 January 2013, Rob Herring wrote:

So, upon the suggestion of Rob Herring and Arnd Bergmann, this commit
introduces a small infrastructure that defines a central
irqchip_init() function in drivers/irqchip/irqchip.c, which is meant
to be called as the ->init_irq() callback of ARM platforms. This
function calls of_irq_init() with an array that will progressively
contain the compatible strings of each irq controller driver, and also
a reference to the initialization functions of such drivers. The
drivers/irqchip/irqchip.h header file, currently empty, is added to
allow irq controller drivers to expose their initialization function
to the main irqchip.c file. Note that the irq controller driver
initialization function is responsible for setting the global
handle_arch_irq() variable, so that ARM platforms no longer have to
define the ->handle_irq field in their DT_MACHINE structure.

This changeset text looks like it refers to an older version of the
patch that did not have the section magic yet.

Signed-off-by: Thomas Petazzoni <redacted>
Reviewed-by: Stephen Warren <redacted>
Reviewed-by: Rob Herring <redacted>

I actually liked the old version better because it was more obvious
to the casual reader how it fits together, but I'm not going to
stand in the way if other people like it this way.

Acked-by: Arnd Bergmann <arnd@arndb.de>