On Fri, 2013-01-11 at 22:25 +0100, Rafael J. Wysocki wrote: > On Thursday, January 10, 2013 04:40:20 PM Toshi Kani wrote: > > Added include/acpi/sys_hotplug.h, which is ACPI-specific system > > device hotplug header and defines the order values of ACPI-specific > > handlers. > > > > Signed-off-by: Toshi Kani <toshi.kani@xxxxxx> > > --- > > include/acpi/sys_hotplug.h | 48 ++++++++++++++++++++++++++++++++++++++++++++ > > 1 file changed, 48 insertions(+) > > create mode 100644 include/acpi/sys_hotplug.h > > > > diff --git a/include/acpi/sys_hotplug.h b/include/acpi/sys_hotplug.h > > new file mode 100644 > > index 0000000..ad80f61 > > --- /dev/null > > +++ b/include/acpi/sys_hotplug.h > > @@ -0,0 +1,48 @@ > > +/* > > + * sys_hotplug.h - ACPI System device hot-plug framework > > + * > > + * Copyright (C) 2012 Hewlett-Packard Development Company, L.P. > > + * Toshi Kani <toshi.kani@xxxxxx> > > + * > > + * This program is free software; you can redistribute it and/or modify > > + * it under the terms of the GNU General Public License version 2 as > > + * published by the Free Software Foundation. > > + */ > > + > > +#ifndef _ACPI_SYS_HOTPLUG_H > > +#define _ACPI_SYS_HOTPLUG_H > > + > > +#include <linux/list.h> > > +#include <linux/device.h> > > +#include <linux/sys_hotplug.h> > > + > > +/* > > + * System device hot-plug operation proceeds in the following order. > > + * Validate phase -> Execute phase -> Commit phase > > + * > > + * The order values below define the calling sequence of ACPI-specific > > + * handlers for each phase in ascending order. The order value of > > + * platform-neutral handlers are defined in <linux/sys_hotplug.h>. > > + */ > > + > > +/* Add Validate order values */ > > +#define SHP_ACPI_BUS_ADD_VALIDATE_ORDER 0 /* must be first */ > > + > > +/* Add Execute order values */ > > +#define SHP_ACPI_BUS_ADD_EXECUTE_ORDER 10 > > +#define SHP_ACPI_RES_ADD_EXECUTE_ORDER 20 > > + > > +/* Add Commit order values */ > > +#define SHP_ACPI_BUS_ADD_COMMIT_ORDER 10 > > + > > +/* Delete Validate order values */ > > +#define SHP_ACPI_BUS_DEL_VALIDATE_ORDER 0 /* must be first */ > > +#define SHP_ACPI_RES_DEL_VALIDATE_ORDER 10 > > + > > +/* Delete Execute order values */ > > +#define SHP_ACPI_BUS_DEL_EXECUTE_ORDER 100 > > + > > +/* Delete Commit order values */ > > +#define SHP_ACPI_BUS_DEL_COMMIT_ORDER 100 > > + > > +#endif /* _ACPI_SYS_HOTPLUG_H */ > > -- > > Why did you use the particular values above? The ordering values above are used to define the relative order among handlers. For instance, the 100 for SHP_ACPI_BUS_DEL_EXECUTE_ORDER can potentially be 21 since it is still larger than 20 for SHP_MEM_DEL_EXECUTE_ORDER defined in linux/sys_hotplug.h. I picked 100 so that more platform-neutral handlers can be added in between 20 and 100 in future. Thanks, -Toshi -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>