[POWERPC] Oprofile: Remove dependency on spufs module

This removes an OProfile dependency on the spufs module.  This
dependency was causing a problem for multiplatform systems that are
built with support for Oprofile on Cell but try to load the oprofile
module on a non-Cell system.

Signed-off-by: Bob Nelson <rrnelson@us.ibm.com>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Acked-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

8 files changed, 99 insertions, 38 deletions

diff --git a/arch/powerpc/platforms/cell/Kconfig b/arch/powerpc/platforms/cell/Kconfig
index e1e2f6a43019..3a963b4a9be0 100644
--- a/arch/powerpc/platforms/cell/Kconfig
+++ b/arch/powerpc/platforms/cell/Kconfig
@@ -88,3 +88,8 @@ config CBE_CPUFREQ_PMI
           but also at lower core voltage.
 
 endmenu
+
+config OPROFILE_CELL
+        def_bool y
+        depends on PPC_CELL_NATIVE && (OPROFILE = m || OPROFILE = y)
+
diff --git a/arch/powerpc/platforms/cell/Makefile b/arch/powerpc/platforms/cell/Makefile
index 61d12f183036..39d695cb9693 100644
--- a/arch/powerpc/platforms/cell/Makefile
+++ b/arch/powerpc/platforms/cell/Makefile
@@ -19,6 +19,7 @@ spu-manage-$(CONFIG_PPC_CELLEB)		+= spu_manage.o
 spu-manage-$(CONFIG_PPC_CELL_NATIVE)    += spu_manage.o
 
 obj-$(CONFIG_SPU_BASE)                  += spu_callbacks.o spu_base.o \
+                                           spu_notify.o \
                                            spu_syscalls.o \
                                            $(spu-priv1-y) \
                                            $(spu-manage-y) \
diff --git a/arch/powerpc/platforms/cell/spu_notify.c b/arch/powerpc/platforms/cell/spu_notify.c
new file mode 100644
index 000000000000..34d156959f39
--- /dev/null
+++ b/arch/powerpc/platforms/cell/spu_notify.c
@@ -0,0 +1,67 @@
+/*
+ * Move OProfile dependencies from spufs module to the kernel so it
+ * can run on non-cell PPC.
+ *
+ * Copyright (C) IBM 2005
+ *
+ * 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.
+ */
+
+#undef DEBUG
+
+#include <linux/module.h>
+#include <asm/spu.h>
+#include "spufs/spufs.h"
+
+static BLOCKING_NOTIFIER_HEAD(spu_switch_notifier);
+
+void spu_switch_notify(struct spu *spu, struct spu_context *ctx)
+{
+        blocking_notifier_call_chain(&spu_switch_notifier,
+                                     ctx ? ctx->object_id : 0, spu);
+}
+EXPORT_SYMBOL_GPL(spu_switch_notify);
+
+int spu_switch_event_register(struct notifier_block *n)
+{
+        int ret;
+        ret = blocking_notifier_chain_register(&spu_switch_notifier, n);
+        if (!ret)
+                notify_spus_active();
+        return ret;
+}
+EXPORT_SYMBOL_GPL(spu_switch_event_register);
+
+int spu_switch_event_unregister(struct notifier_block *n)
+{
+        return blocking_notifier_chain_unregister(&spu_switch_notifier, n);
+}
+EXPORT_SYMBOL_GPL(spu_switch_event_unregister);
+
+void spu_set_profile_private_kref(struct spu_context *ctx,
+                                  struct kref *prof_info_kref,
+                                  void (* prof_info_release) (struct kref *kref))
+{
+        ctx->prof_priv_kref = prof_info_kref;
+        ctx->prof_priv_release = prof_info_release;
+}
+EXPORT_SYMBOL_GPL(spu_set_profile_private_kref);
+
+void *spu_get_profile_private_kref(struct spu_context *ctx)
+{
+        return ctx->prof_priv_kref;
+}
+EXPORT_SYMBOL_GPL(spu_get_profile_private_kref);
+
diff --git a/arch/powerpc/platforms/cell/spu_syscalls.c b/arch/powerpc/platforms/cell/spu_syscalls.c
index a9438b719fe8..75530d99eda6 100644
--- a/arch/powerpc/platforms/cell/spu_syscalls.c
+++ b/arch/powerpc/platforms/cell/spu_syscalls.c
@@ -145,6 +145,20 @@ int elf_coredump_extra_notes_write(struct file *file, loff_t *foffset)
         return ret;
 }
 
+void notify_spus_active(void)
+{
+        struct spufs_calls *calls;
+
+        calls = spufs_calls_get();
+        if (!calls)
+                return;
+
+        calls->notify_spus_active();
+        spufs_calls_put(calls);
+
+        return;
+}
+
 int register_spu_syscalls(struct spufs_calls *calls)
 {
         if (spufs_calls)
diff --git a/arch/powerpc/platforms/cell/spufs/context.c b/arch/powerpc/platforms/cell/spufs/context.c
index 9cb081c26e71..adf0a030d6fe 100644
--- a/arch/powerpc/platforms/cell/spufs/context.c
+++ b/arch/powerpc/platforms/cell/spufs/context.c
@@ -190,19 +190,3 @@ void spu_release_saved(struct spu_context *ctx)
         spu_release(ctx);
 }
 
-void spu_set_profile_private_kref(struct spu_context *ctx,
-                                  struct kref *prof_info_kref,
-                                  void ( * prof_info_release) (struct kref *kref))
-{
-        ctx->prof_priv_kref = prof_info_kref;
-        ctx->prof_priv_release = prof_info_release;
-}
-EXPORT_SYMBOL_GPL(spu_set_profile_private_kref);
-
-void *spu_get_profile_private_kref(struct spu_context *ctx)
-{
-        return ctx->prof_priv_kref;
-}
-EXPORT_SYMBOL_GPL(spu_get_profile_private_kref);
-
-
diff --git a/arch/powerpc/platforms/cell/spufs/sched.c b/arch/powerpc/platforms/cell/spufs/sched.c
index 4d257b3f9336..6e2a45e60261 100644
--- a/arch/powerpc/platforms/cell/spufs/sched.c
+++ b/arch/powerpc/platforms/cell/spufs/sched.c
@@ -166,15 +166,7 @@ static int node_allowed(struct spu_context *ctx, int node)
         return rval;
 }
 
-static BLOCKING_NOTIFIER_HEAD(spu_switch_notifier);
-
-void spu_switch_notify(struct spu *spu, struct spu_context *ctx)
-{
-        blocking_notifier_call_chain(&spu_switch_notifier,
-                            ctx ? ctx->object_id : 0, spu);
-}
-
-static void notify_spus_active(void)
+void do_notify_spus_active(void)
 {
         int node;
 
@@ -200,22 +192,15 @@ static void notify_spus_active(void)
                 mutex_unlock(&cbe_spu_info[node].list_mutex);
         }
 }
+EXPORT_SYMBOL_GPL(do_notify_spus_active);
 
-int spu_switch_event_register(struct notifier_block * n)
-{
-        int ret;
-        ret = blocking_notifier_chain_register(&spu_switch_notifier, n);
-        if (!ret)
-                notify_spus_active();
-        return ret;
-}
-EXPORT_SYMBOL_GPL(spu_switch_event_register);
-
-int spu_switch_event_unregister(struct notifier_block * n)
+#ifndef MODULE
+void notify_spus_active(void)
 {
-        return blocking_notifier_chain_unregister(&spu_switch_notifier, n);
+        do_notify_spus_active();
 }
-EXPORT_SYMBOL_GPL(spu_switch_event_unregister);
+EXPORT_SYMBOL_GPL(notify_spus_active);
+#endif
 
 /**
  * spu_bind_context - bind spu context to physical spu
diff --git a/arch/powerpc/platforms/cell/spufs/syscalls.c b/arch/powerpc/platforms/cell/spufs/syscalls.c
index 2c34f7170190..430404413178 100644
--- a/arch/powerpc/platforms/cell/spufs/syscalls.c
+++ b/arch/powerpc/platforms/cell/spufs/syscalls.c
@@ -86,5 +86,6 @@ struct spufs_calls spufs_calls = {
         .spu_run = do_spu_run,
         .coredump_extra_notes_size = spufs_coredump_extra_notes_size,
         .coredump_extra_notes_write = spufs_coredump_extra_notes_write,
+        .notify_spus_active = do_notify_spus_active,
         .owner = THIS_MODULE,
 };
diff --git a/include/asm-powerpc/spu.h b/include/asm-powerpc/spu.h
index b1accce77bb5..34b7807f068b 100644
--- a/include/asm-powerpc/spu.h
+++ b/include/asm-powerpc/spu.h
@@ -246,6 +246,7 @@ struct spufs_calls {
                                                 __u32 __user *ustatus);
         int (*coredump_extra_notes_size)(void);
         int (*coredump_extra_notes_write)(struct file *file, loff_t *foffset);
+        void (*notify_spus_active)(void);
         struct module *owner;
 };
 
@@ -298,6 +299,9 @@ struct notifier_block;
 int spu_switch_event_register(struct notifier_block * n);
 int spu_switch_event_unregister(struct notifier_block * n);
 
+extern void notify_spus_active(void);
+extern void do_notify_spus_active(void);
+
 /*
  * This defines the Local Store, Problem Area and Privlege Area of an SPU.
  */