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x86: i915 needs pgprot_writecombine() and is_io_mapping_possible() 

Impact: build fix

Theodore Ts reported that the i915 driver needs these symbols:

 ERROR: "pgprot_writecombine" [drivers/gpu/drm/i915/i915.ko] undefined!
 ERROR: "is_io_mapping_possible" [drivers/gpu/drm/i915/i915.ko] undefined!

Reported-by: Theodore Ts'o <tytso@mit.edu> wrote:
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Ingo Molnar 2009-02-28 14:09:27 +01:00
parent 778ef1e6cb
commit 92b9af9e4f
2 changed files with 6 additions and 11 deletions
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15
arch/x86/mm/iomap_32.c
View File

@ -20,23 +20,16 @@
#include <asm/pat.h>
#include <linux/module.h>
#ifdef CONFIG_X86_PAE
int
is_io_mapping_possible(resource_size_t base, unsigned long size)
{
return 1;
}
#else
int
is_io_mapping_possible(resource_size_t base, unsigned long size)
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;
}
#endif
EXPORT_SYMBOL_GPL(is_io_mapping_possible);
/* Map 'pfn' using fixed map 'type' and protections 'prot'
*/

2
arch/x86/mm/pat.c
View File

@ -11,6 +11,7 @@
#include <linux/bootmem.h>
#include <linux/debugfs.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/gfp.h>
#include <linux/mm.h>
#include <linux/fs.h>
@ -868,6 +869,7 @@ pgprot_t pgprot_writecombine(pgprot_t prot)
else
return pgprot_noncached(prot);
}
EXPORT_SYMBOL_GPL(pgprot_writecombine);
#if defined(CONFIG_DEBUG_FS) && defined(CONFIG_X86_PAT)