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io-mapping.h: s/PAGE_KERNEL_IO/PAGE_KERNEL/

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PAGE_KERNEL_IO is an x86-ism. Though it is used to define the pgprot_t
used for the iomapped region, it itself is just PAGE_KERNEL. On all
other arches, PAGE_KERNEL_IO is undefined so in a general header we must
refrain from using it.

v2: include pgtable for pgprot_combine()

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Fixes: cafaf14a5d ("io-mapping: Always create a struct to hold metadata about the io-mapping")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: linux-mm@kvack.org
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20160823155024.22379-1-chris@chris-wilson.co.uk
(cherry picked from commit ac96b55669)
This commit is contained in:
Chris Wilson 2016-08-23 16:50:24 +01:00 committed by Daniel Vetter
parent d5d0804f8f
commit bcaaa0c431
1 changed files with 2 additions and 2 deletions
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4
include/linux/io-mapping.h
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@ -112,7 +112,7 @@ io_mapping_unmap(void __iomem *vaddr)
#else
#include <linux/uaccess.h>
#include <asm/pgtable_types.h>
#include <asm/pgtable.h>
/* Create the io_mapping object*/
static inline struct io_mapping *
@ -123,7 +123,7 @@ io_mapping_init_wc(struct io_mapping *iomap,
iomap->base = base;
iomap->size = size;
iomap->iomem = ioremap_wc(base, size);
iomap->prot = pgprot_writecombine(PAGE_KERNEL_IO);
iomap->prot = pgprot_writecombine(PAGE_KERNEL);
return iomap;
}