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authorRussell King <rmk@dyn-67.arm.linux.org.uk>2009-03-13 21:44:51 +0000
committerRussell King <rmk+kernel@arm.linux.org.uk>2009-03-13 21:44:51 +0000
commit97fb44eb6bc01f4ffed4300e475aa15e44877375 (patch)
tree481ed6efd0babe7185cae04f2fd295426b36411d /arch/x86/mm/iomap_32.c
parente4707dd3e9d0cb57597b6568a5e51fea5d6fca41 (diff)
parent148854c65ea8046b045672fd49f4333aefaa3ab5 (diff)
Merge branch 'for-rmk' of git://git.pengutronix.de/git/imx/linux-2.6 into devel
Conflicts: arch/arm/mach-at91/gpio.c
Diffstat (limited to 'arch/x86/mm/iomap_32.c')
-rw-r--r--arch/x86/mm/iomap_32.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/x86/mm/iomap_32.c b/arch/x86/mm/iomap_32.c
index ca53224fc56c..04102d42ff42 100644
--- a/arch/x86/mm/iomap_32.c
+++ b/arch/x86/mm/iomap_32.c
@@ -20,6 +20,17 @@
#include <asm/pat.h>
#include <linux/module.h>
+int is_io_mapping_possible(resource_size_t base, unsigned long size)
+{
+#ifndef CONFIG_X86_PAE
+ /* There is no way to map greater than 1 << 32 address without PAE */
+ if (base + size > 0x100000000ULL)
+ return 0;
+#endif
+ return 1;
+}
+EXPORT_SYMBOL_GPL(is_io_mapping_possible);
+
/* Map 'pfn' using fixed map 'type' and protections 'prot'
*/
void *