linux-kernel - [PATCH] create CONFIG_SUSPEND_UP

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Date:	Mon, 30 Jul 2007 23:54:22 -0400
From:	Len Brown <lenb@...nel.org>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>, david@...g.hm,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
	Pavel Machek <pavel@....cz>, Adrian Bunk <bunk@...sta.de>,
	Stefan Richter <stefanr@...6.in-berlin.de>,
	Nigel Cunningham <nigel@...el.suspend2.net>,
	pm list <linux-pm@...ts.linux-foundation.org>
Subject: [PATCH] create CONFIG_SUSPEND_UP_POSSIBLE

From: Linus Torvalds <torvalds@...ux-foundation.org>

Without this change, it is possible to build CONFIG_HIBERNATE
on all !SMP architectures, but not necessarily their SMP versions.

I don't know for sure if the architecture list under SUSPEND_UP_POSSIBLE
is correct.  For now it simply matches the list for SUSPEND_SMP_POSSIBLE.

Signed-off-by: Len Brown <len.brown@...el.com>
---
 Kconfig |    7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/kernel/power/Kconfig b/kernel/power/Kconfig
index 412859f..ccf6576 100644
--- a/kernel/power/Kconfig
+++ b/kernel/power/Kconfig
@@ -72,6 +72,11 @@ config PM_TRACE
 	CAUTION: this option will cause your machine's real-time clock to be
 	set to an invalid time after a resume.
 
+config SUSPEND_UP_POSSIBLE
+	bool
+	depends on (X86 && !X86_VOYAGER) || (PPC64 && (PPC_PSERIES || PPC_PMAC))
+	default y
+
 config SUSPEND_SMP_POSSIBLE
 	bool
 	depends on (X86 && !X86_VOYAGER) || (PPC64 && (PPC_PSERIES || PPC_PMAC))
@@ -92,7 +97,7 @@ config PM_SLEEP
 config SUSPEND
 	bool "Suspend to RAM and standby"
 	depends on PM
-	depends on !SMP || SUSPEND_SMP_POSSIBLE
+	depends on (!SMP && SUSPEND_UP_POSSIBLE) || (SMP && SUSPEND_SMP_POSSIBLE)
 	default y
 	---help---
 	  Allow the system to enter sleep states in which main memory is
-
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