From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <44AB6855.4030905@domain.hid>
Date: Wed, 05 Jul 2006 09:20:53 +0200
From: Jan Kiszka <jan.kiszka@domain.hid>
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Subject: [Xenomai-core] [PATCH] fix swsusp for gatekeeper thread
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Hi,

this is a convenience patch for people like me running Xenomai on their w=
orkstation or notebook. It fixes a crash that occurs on suspend to disk/r=
am via swsusp because the gatekeeper is woken up by the suspension code b=
ut has nothing to migrate then.

With this patch applied, you can now suspend your machine as long as no s=
kin is loaded, i.e. the nucleus is passive. When skins are loaded, the sy=
stem hangs on resume, maybe due to wrong hardware re-initialisation.

Jan


 include/asm-generic/wrappers.h |    3 +++
 ksrc/nucleus/shadow.c          |    2 ++
 2 files changed, 5 insertions(+)

Index: include/asm-generic/wrappers.h
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
--- include/asm-generic/wrappers.h      (Revision 1281)
+++ include/asm-generic/wrappers.h      (Arbeitskopie)
@@ -161,6 +161,9 @@ struct task_struct;
 void show_stack(struct task_struct *task,
                unsigned long *sp);

+/* Process suspension */
+#define PF_NOFREEZE 0
+
 #else /* LINUX_VERSION_CODE >=3D KERNEL_VERSION(2,5,0) */

 /* VM */
Index: ksrc/nucleus/shadow.c
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
--- ksrc/nucleus/shadow.c       (Revision 1281)
+++ ksrc/nucleus/shadow.c       (Arbeitskopie)
@@ -53,6 +53,7 @@
 #include <nucleus/ppd.h>
 #include <nucleus/trace.h>
 #include <asm/xenomai/features.h>
+#include <asm/xenomai/wrappers.h>

 int nkthrptd;

@@ -2023,6 +2024,7 @@ int xnshadow_mount(void)
                gk->server =3D
                    kthread_create(&gatekeeper_thread, gk, "gatekeeper/%d=
",
                                   cpu);
+               gk->server->flags |=3D PF_NOFREEZE;
                wake_up_process(gk->server);
                down(&gk->sync);
        }




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