From: Greg Kroah-Hartman <[email protected]>
Introduce the Kconfig entry and actually switch to a 64bit value, if
wanted, for resource_size_t.
Based on a patch series originally from Vivek Goyal <[email protected]>
Cc: Vivek Goyal <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
arch/i386/Kconfig | 1 +
include/linux/types.h | 7 ++++++-
kernel/resource.c | 8 +++-----
mm/Kconfig | 6 ++++++
4 files changed, 16 insertions(+), 6 deletions(-)
diff --git a/arch/i386/Kconfig b/arch/i386/Kconfig
index 47c08bc..7e46ad7 100644
--- a/arch/i386/Kconfig
+++ b/arch/i386/Kconfig
@@ -529,6 +529,7 @@ config X86_PAE
bool
depends on HIGHMEM64G
default y
+ select RESOURCES_64BIT
# Common NUMA Features
config NUMA
diff --git a/include/linux/types.h b/include/linux/types.h
index a021e15..3f23566 100644
--- a/include/linux/types.h
+++ b/include/linux/types.h
@@ -178,9 +178,14 @@ #endif
#ifdef __KERNEL__
typedef unsigned __bitwise__ gfp_t;
-typedef unsigned long resource_size_t;
+#ifdef CONFIG_RESOURCES_64BIT
+typedef u64 resource_size_t;
+#else
+typedef u32 resource_size_t;
#endif
+#endif /* __KERNEL__ */
+
struct ustat {
__kernel_daddr_t f_tfree;
__kernel_ino_t f_tinode;
diff --git a/kernel/resource.c b/kernel/resource.c
index 54835c0..cc73029 100644
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -23,20 +23,18 @@ #include <asm/io.h>
struct resource ioport_resource = {
.name = "PCI IO",
- .start = 0x0000,
+ .start = 0,
.end = IO_SPACE_LIMIT,
.flags = IORESOURCE_IO,
};
-
EXPORT_SYMBOL(ioport_resource);
struct resource iomem_resource = {
.name = "PCI mem",
- .start = 0UL,
- .end = ~0UL,
+ .start = 0,
+ .end = -1,
.flags = IORESOURCE_MEM,
};
-
EXPORT_SYMBOL(iomem_resource);
static DEFINE_RWLOCK(resource_lock);
diff --git a/mm/Kconfig b/mm/Kconfig
index 66e65ab..e3644b0 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -145,3 +145,9 @@ config MIGRATION
while the virtual addresses are not changed. This is useful for
example on NUMA systems to put pages nearer to the processors accessing
the page.
+
+config RESOURCES_64BIT
+ bool "64 bit Memory and IO resources (EXPERIMENTAL)" if (!64BIT && EXPERIMENTAL)
+ default 64BIT
+ help
+ This option allows memory and IO resources to be 64 bit.
--
1.4.0
-
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