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io mapping: clean up #ifdefs 

Impact: cleanup

clean up ifdefs: change #ifdef CONFIG_X86_32/64 to
CONFIG_HAVE_ATOMIC_IOMAP.

flip around the #ifdef sections to clean up the structure.

Signed-off-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Keith Packard 2008-11-03 18:21:45 +01:00 committed by Ingo Molnar
parent 8d5c6603c4
commit e5beae1690
2 changed files with 52 additions and 41 deletions
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4
arch/x86/Kconfig
View File

@ -1894,6 +1894,10 @@ config SYSVIPC_COMPAT
endmenu endmenu
config HAVE_ATOMIC_IOMAP
def_bool y
depends on X86_32
source "net/Kconfig" source "net/Kconfig"
source "drivers/Kconfig" source "drivers/Kconfig"

89
include/linux/io-mapping.h
View File

@ -33,48 +33,15 @@
/* this struct isn't actually defined anywhere */ /* this struct isn't actually defined anywhere */
struct io_mapping; struct io_mapping;
#ifdef CONFIG_X86_64 #ifdef CONFIG_HAVE_ATOMIC_IOMAP
/* Create the io_mapping object*/ /*
static inline struct io_mapping * * For small address space machines, mapping large objects
io_mapping_create_wc(unsigned long base, unsigned long size) * into the kernel virtual space isn't practical. Where
{ * available, use fixmap support to dynamically map pages
return (struct io_mapping *) ioremap_wc(base, size); * of the object at run time.
} */
static inline void
io_mapping_free(struct io_mapping *mapping)
{
iounmap(mapping);
}
/* Atomic map/unmap */
static inline void *
io_mapping_map_atomic_wc(struct io_mapping *mapping, unsigned long offset)
{
return ((char *) mapping) + offset;
}
static inline void
io_mapping_unmap_atomic(void *vaddr)
{
}
/* Non-atomic map/unmap */
static inline void *
io_mapping_map_wc(struct io_mapping *mapping, unsigned long offset)
{
return ((char *) mapping) + offset;
}
static inline void
io_mapping_unmap(void *vaddr)
{
}
#endif /* CONFIG_X86_64 */
#ifdef CONFIG_X86_32
static inline struct io_mapping * static inline struct io_mapping *
io_mapping_create_wc(unsigned long base, unsigned long size) io_mapping_create_wc(unsigned long base, unsigned long size)
{ {
@ -113,6 +80,46 @@ io_mapping_unmap(void *vaddr)
{ {
iounmap(vaddr); iounmap(vaddr);
} }
#endif /* CONFIG_X86_32 */
#else
/* Create the io_mapping object*/
static inline struct io_mapping *
io_mapping_create_wc(unsigned long base, unsigned long size)
{
return (struct io_mapping *) ioremap_wc(base, size);
}
static inline void
io_mapping_free(struct io_mapping *mapping)
{
iounmap(mapping);
}
/* Atomic map/unmap */
static inline void *
io_mapping_map_atomic_wc(struct io_mapping *mapping, unsigned long offset)
{
return ((char *) mapping) + offset;
}
static inline void
io_mapping_unmap_atomic(void *vaddr)
{
}
/* Non-atomic map/unmap */
static inline void *
io_mapping_map_wc(struct io_mapping *mapping, unsigned long offset)
{
return ((char *) mapping) + offset;
}
static inline void
io_mapping_unmap(void *vaddr)
{
}
#endif /* HAVE_ATOMIC_IOMAP */
#endif /* _LINUX_IO_MAPPING_H */ #endif /* _LINUX_IO_MAPPING_H */