This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / arch / powerpc / platforms / cell / spu_coredump.c

diff --git a/arch/powerpc/platforms/cell/spu_coredump.c b/arch/powerpc/platforms/cell/spu_coredump.c
new file mode 100644 (file)
index 0000000..6915b41
--- /dev/null
+++ b/arch/powerpc/platforms/cell/spu_coredump.c
@@ -0,0 +1,81 @@
+/*
+ * SPU core dump code
+ *
+ * (C) Copyright 2006 IBM Corp.
+ *
+ * Author: Dwayne Grant McConnell <decimal@us.ibm.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.        See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/file.h>
+#include <linux/module.h>
+#include <linux/syscalls.h>
+
+#include <asm/spu.h>
+
+static struct spu_coredump_calls spu_coredump_calls;
+static DEFINE_MUTEX(spu_coredump_mutex);
+
+int arch_notes_size(void)
+{
+       long ret;
+       struct module *owner = spu_coredump_calls.owner;
+
+       ret = -ENOSYS;
+       mutex_lock(&spu_coredump_mutex);
+       if (owner && try_module_get(owner)) {
+               ret = spu_coredump_calls.arch_notes_size();
+               module_put(owner);
+       }
+       mutex_unlock(&spu_coredump_mutex);
+       return ret;
+}
+
+void arch_write_notes(struct file *file)
+{
+       struct module *owner = spu_coredump_calls.owner;
+
+       mutex_lock(&spu_coredump_mutex);
+       if (owner && try_module_get(owner)) {
+               spu_coredump_calls.arch_write_notes(file);
+               module_put(owner);
+       }
+       mutex_unlock(&spu_coredump_mutex);
+}
+
+int register_arch_coredump_calls(struct spu_coredump_calls *calls)
+{
+       if (spu_coredump_calls.owner)
+               return -EBUSY;
+
+       mutex_lock(&spu_coredump_mutex);
+       spu_coredump_calls.arch_notes_size = calls->arch_notes_size;
+       spu_coredump_calls.arch_write_notes = calls->arch_write_notes;
+       spu_coredump_calls.owner = calls->owner;
+       mutex_unlock(&spu_coredump_mutex);
+       return 0;
+}
+EXPORT_SYMBOL_GPL(register_arch_coredump_calls);
+
+void unregister_arch_coredump_calls(struct spu_coredump_calls *calls)
+{
+       BUG_ON(spu_coredump_calls.owner != calls->owner);
+
+       mutex_lock(&spu_coredump_mutex);
+       spu_coredump_calls.owner = NULL;
+       mutex_unlock(&spu_coredump_mutex);
+}
+EXPORT_SYMBOL_GPL(unregister_arch_coredump_calls);