kconfig: mention 'hibernation' not just swsusp

Clarify that "software suspend" is what's called "hibernation" in most user
interfaces, shrinking a terminology gap.  (Examples include Gnome and
MS-Windows.)

Also provide a more succinct description of what it does, so you won't have
to read the whole novel in Kconfig; and highlights just why the lack of
BIOS requirements for swsusp are a big deal.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Acked-by: "Rafael J. Wysocki" <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/kernel/power/Kconfig b/kernel/power/Kconfig
index 51a4dd0..8777217 100644 (file)
--- a/kernel/power/Kconfig
+++ b/kernel/power/Kconfig
@@ -78,17 +78,22 @@ config PM_SYSFS_DEPRECATED
          are likely to be bus or driver specific.
 
 config SOFTWARE_SUSPEND
-       bool "Software Suspend"
+       bool "Software Suspend (Hibernation)"
        depends on PM && SWAP && ((X86 && (!SMP || SUSPEND_SMP)) || ((FRV || PPC32) && !SMP))
        ---help---
-         Enable the suspend to disk (STD) functionality.
+         Enable the suspend to disk (STD) functionality, which is usually
+         called "hibernation" in user interfaces.  STD checkpoints the
+         system and powers it off; and restores that checkpoint on reboot.
 
          You can suspend your machine with 'echo disk > /sys/power/state'.
          Alternatively, you can use the additional userland tools available
          from <http://suspend.sf.net>.
 
          In principle it does not require ACPI or APM, although for example
-         ACPI will be used if available.
+         ACPI will be used for the final steps when it is available.  One
+         of the reasons to use software suspend is that the firmware hooks
+         for suspend states like suspend-to-RAM (STR) often don't work very
+         well with Linux.
 
          It creates an image which is saved in your active swap. Upon the next
          boot, pass the 'resume=/dev/swappartition' argument to the kernel to