of: Only compile OF_DYNAMIC on PowerPC pseries and iseries
Only two architectures use the OF node reference counting and reclaim bits.
There is no need to compile it for the rest of the PowerPC platforms or for
any of the other architectures. This patch makes iseries and pseries
select CONFIG_OF_DYNAMIC, and makes it default to off for everything else.
It is still safe to turn on CONFIG_OF_DYNAMIC on all architectures, it just
isn't necessary.
v2: Also select OF_DYNAMIC for PPC_CHROMA and MPC885ADS as reported by Michael
Meuling
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Jimi Xenidis <jimix@pobox.com> (for PPC_CHROMA bug fix)
Cc: Rob Herring <rob.herring@calxeda.com>
diff --git a/arch/powerpc/platforms/8xx/Kconfig b/arch/powerpc/platforms/8xx/Kconfig
index ee56a9e..1fb0b3c 100644
--- a/arch/powerpc/platforms/8xx/Kconfig
+++ b/arch/powerpc/platforms/8xx/Kconfig
@@ -26,6 +26,7 @@
config MPC885ADS
bool "MPC885ADS"
select CPM1
+ select OF_DYNAMIC
help
Freescale Semiconductor MPC885 Application Development System (ADS).
Also known as DUET.
diff --git a/arch/powerpc/platforms/iseries/Kconfig b/arch/powerpc/platforms/iseries/Kconfig
index b57cda3..63835e0 100644
--- a/arch/powerpc/platforms/iseries/Kconfig
+++ b/arch/powerpc/platforms/iseries/Kconfig
@@ -1,6 +1,7 @@
config PPC_ISERIES
bool "IBM Legacy iSeries"
depends on PPC64 && PPC_BOOK3S
+ select OF_DYNAMIC
select PPC_SMP_MUXED_IPI
select PPC_INDIRECT_PIO
select PPC_INDIRECT_MMIO
diff --git a/arch/powerpc/platforms/pseries/Kconfig b/arch/powerpc/platforms/pseries/Kconfig
index ae7b6d4..1114f8f 100644
--- a/arch/powerpc/platforms/pseries/Kconfig
+++ b/arch/powerpc/platforms/pseries/Kconfig
@@ -3,6 +3,7 @@
bool "IBM pSeries & new (POWER5-based) iSeries"
select HAVE_PCSPKR_PLATFORM
select MPIC
+ select OF_DYNAMIC
select PCI_MSI
select PPC_XICS
select PPC_ICP_NATIVE
diff --git a/arch/powerpc/platforms/wsp/Kconfig b/arch/powerpc/platforms/wsp/Kconfig
index 57d22a2..79d2225 100644
--- a/arch/powerpc/platforms/wsp/Kconfig
+++ b/arch/powerpc/platforms/wsp/Kconfig
@@ -25,6 +25,7 @@
bool "PowerEN PCIe Chroma Card"
select EPAPR_BOOT
select PPC_WSP
+ select OF_DYNAMIC
default y
endmenu
diff --git a/drivers/of/Kconfig b/drivers/of/Kconfig
index 268163d..6ea51dc 100644
--- a/drivers/of/Kconfig
+++ b/drivers/of/Kconfig
@@ -35,9 +35,10 @@
config OF_PROMTREE
bool
+# Hardly any platforms need this. It is safe to select, but only do so if you
+# need it.
config OF_DYNAMIC
- def_bool y
- depends on PPC_OF
+ bool
config OF_ADDRESS
def_bool y
diff --git a/drivers/of/base.c b/drivers/of/base.c
index 13ba728..5806449 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -88,7 +88,7 @@
}
EXPORT_SYMBOL(of_n_size_cells);
-#if !defined(CONFIG_SPARC) /* SPARC doesn't do ref counting (yet) */
+#if defined(CONFIG_OF_DYNAMIC)
/**
* of_node_get - Increment refcount of a node
* @node: Node to inc refcount, NULL is supported to
@@ -161,7 +161,7 @@
kref_put(&node->kref, of_node_release);
}
EXPORT_SYMBOL(of_node_put);
-#endif /* !CONFIG_SPARC */
+#endif /* CONFIG_OF_DYNAMIC */
struct property *of_find_property(const struct device_node *np,
const char *name,
diff --git a/include/linux/of.h b/include/linux/of.h
index 5a4a3ad..533603e 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -72,19 +72,17 @@
uint32_t args[MAX_PHANDLE_ARGS];
};
-#if defined(CONFIG_SPARC) || !defined(CONFIG_OF)
+#ifdef CONFIG_OF_DYNAMIC
+extern struct device_node *of_node_get(struct device_node *node);
+extern void of_node_put(struct device_node *node);
+#else /* CONFIG_OF_DYNAMIC */
/* Dummy ref counting routines - to be implemented later */
static inline struct device_node *of_node_get(struct device_node *node)
{
return node;
}
-static inline void of_node_put(struct device_node *node)
-{
-}
-#else
-extern struct device_node *of_node_get(struct device_node *node);
-extern void of_node_put(struct device_node *node);
-#endif
+static inline void of_node_put(struct device_node *node) { }
+#endif /* !CONFIG_OF_DYNAMIC */
#ifdef CONFIG_OF
