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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>
This commit is contained in:
Grant Likely 2012-02-15 20:38:40 -07:00
parent 5411972995
commit 0f22dd395f
7 changed files with 15 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/powerpc/platforms/8xx/Kconfig
View File

@ -26,6 +26,7 @@ config MPC86XADS
config MPC885ADS
bool "MPC885ADS"
select CPM1
select OF_DYNAMIC
help
Freescale Semiconductor MPC885 Application Development System (ADS).
Also known as DUET.

1
arch/powerpc/platforms/iseries/Kconfig
View File

@ -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

1
arch/powerpc/platforms/pseries/Kconfig
View File

@ -3,6 +3,7 @@ config PPC_PSERIES
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

1
arch/powerpc/platforms/wsp/Kconfig
View File

@ -25,6 +25,7 @@ config PPC_CHROMA
bool "PowerEN PCIe Chroma Card"
select EPAPR_BOOT
select PPC_WSP
select OF_DYNAMIC
default y
endmenu

5
drivers/of/Kconfig
View File

@ -35,9 +35,10 @@ config OF_EARLY_FLATTREE
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

4
drivers/of/base.c
View File

@ -88,7 +88,7 @@ int of_n_size_cells(struct device_node *np)
}
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 @@ void of_node_put(struct device_node *node)
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,

14
include/linux/of.h
View File

@ -72,19 +72,17 @@ struct of_phandle_args {
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