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SubjectRe: [git pull] drm patches for 2.6.27-rc1
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On Sun, 2008-10-19 at 00:32 +0200, Ingo Molnar wrote:

> Mind sending patches for this? :-)

Here's what these functions would look like as wrappers on top of the
existing APIs:

/* x86_64 style */
static inline struct io_reserve *
iomap_reserve(unsigned long base, unsigned long size)
{
return (struct io_reserve *) ioremap_wc(base, size);
}
static inline void *
iomap_atomic(struct io_reserve *reserve, unsigned long offset)
{
return ((char *) reserve) + offset;
}
static inline void
iounmap_atomic(void *vaddr)
{
}
static inline void
iomap_unreserve(struct io_reserve *reserve)
{
iounmap(reserve);
}
/* HIGHMEM style */
#if 0
static inline struct io_reserve *
iomap_reserve(unsigned long base, unsigned long size)
{
return (struct io_reserve *) base;
}
static inline void *
iomap_atomic(struct io_reserve *reserve, unsigned long offset)
{
offset += (unsigned long) reserve;
return kmap_atomic(offset >> PAGE_SHIFT, KM_USER0);
}
static inline void
iounmap_atomic(void *vaddr)
{
kunmap_atomic(vaddr, KM_USER0);
}
static inline void
iomap_unreserve(struct io_reserve *reserve)
{
}
#endif
/* 32-bit non-HIGHMEM style */
#if 0
static inline struct io_reserve *
iomap_reserve(unsigned long base, unsigned long size)
{
return NULL;
}
static inline void *
iomap_atomic(struct io_reserve *reserve, unsigned long offset)
{
return NULL;
}
static inline void
iounmap_atomic(void *vaddr)
{
}
static inline void
iomap_unreserve(struct io_reserve *reserve)
{
}
#endif
>
> Ingo
--
keith.packard@intel.com
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