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fe0c935a6c
This patch series cleans up some misconceptions about pm_ops. Some users of the pm_ops structure attempt to use it to stop the user from entering suspend to disk, this, however, is not possible since the user can always use "shutdown" in /sys/power/disk and then the pm_ops are never invoked. Also, platforms that don't support suspend to disk simply should not allow configuring SOFTWARE_SUSPEND (read the help text on it, it only selects suspend to disk and nothing else, all the other stuff depends on PM). The pm_ops structure is actually intended to provide a way to enter platform-defined sleep states (currently supported states are "standby" and "mem" (suspend to ram)) and additionally (if SOFTWARE_SUSPEND is configured) allows a platform to support a platform specific way to enter low-power mode once everything has been saved to disk. This is currently only used by ACPI (S4). This patch: The pm_ops.pm_disk_mode is used in totally bogus ways since nobody really seems to understand what it actually does. This patch clarifies the pm_disk_mode description. It also removes all the arm and sh users that think they can veto suspend to disk via pm_ops; not so since the user can always do echo shutdown > /sys/power/disk, they need to find a better way involving Kconfig or such. ACPI is the only user left with a non-zero pm_disk_mode. The patch also sets the default mode to shutdown again, but when a new pm_ops is registered its pm_disk_mode is selected as default, that way the default stays for ACPI where it is apparently required. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Cc: David Brownell <david-b@pacbell.net> Acked-by: Pavel Machek <pavel@ucw.cz> Cc: <linux-pm@lists.linux-foundation.org> Cc: Len Brown <lenb@kernel.org> Acked-by: Russell King <rmk@arm.linux.org.uk> Cc: Greg KH <greg@kroah.com> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Acked-by: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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| .. | ||
| at91rm9200_devices.c | ||
| at91rm9200_time.c | ||
| at91rm9200.c | ||
| at91sam926x_time.c | ||
| at91sam9260_devices.c | ||
| at91sam9260.c | ||
| at91sam9261_devices.c | ||
| at91sam9261.c | ||
| at91sam9263_devices.c | ||
| at91sam9263.c | ||
| board-1arm.c | ||
| board-carmeva.c | ||
| board-csb337.c | ||
| board-csb637.c | ||
| board-dk.c | ||
| board-eb9200.c | ||
| board-ek.c | ||
| board-kafa.c | ||
| board-kb9202.c | ||
| board-sam9260ek.c | ||
| board-sam9261ek.c | ||
| board-sam9263ek.c | ||
| clock.c | ||
| clock.h | ||
| generic.h | ||
| gpio.c | ||
| irq.c | ||
| Kconfig | ||
| leds.c | ||
| Makefile | ||
| Makefile.boot | ||
| pm.c | ||