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Commit df08cdc7 authored by Andrew Morton's avatar Andrew Morton Committed by Linus Torvalds
Browse files

drivers/pci/intel-iommu.c: fix build with older gcc's 

drivers/pci/intel-iommu.c: In function `__iommu_calculate_agaw':
drivers/pci/intel-iommu.c:437: sorry, unimplemented: inlining failed in call to 'width_to_agaw': function body not available
drivers/pci/intel-iommu.c:445: sorry, unimplemented: called from here

Move the offending function (and its siblings) to top-of-file, remove the
forward declaration.

Addresses https://bugzilla.kernel.org/show_bug.cgi?id=17441



Reported-by: default avatarMartin Mokrejs <mmokrejs@ribosome.natur.cuni.cz>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: <stable@kernel.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent e85bfd3a

drivers/pci/intel-iommu.c

+43 −47
Original line number Diff line number Diff line
@@ -71,6 +71,49 @@ 
#define DMA_32BIT_PFN		IOVA_PFN(DMA_BIT_MASK(32))

#define DMA_64BIT_PFN		IOVA_PFN(DMA_BIT_MASK(64))



/* page table handling */

#define LEVEL_STRIDE		(9)

#define LEVEL_MASK		(((u64)1 << LEVEL_STRIDE) - 1)



static inline int agaw_to_level(int agaw)

{

	return agaw + 2;

}



static inline int agaw_to_width(int agaw)

{

	return 30 + agaw * LEVEL_STRIDE;

}



static inline int width_to_agaw(int width)

{

	return (width - 30) / LEVEL_STRIDE;

}



static inline unsigned int level_to_offset_bits(int level)

{

	return (level - 1) * LEVEL_STRIDE;

}



static inline int pfn_level_offset(unsigned long pfn, int level)

{

	return (pfn >> level_to_offset_bits(level)) & LEVEL_MASK;

}



static inline unsigned long level_mask(int level)

{

	return -1UL << level_to_offset_bits(level);

}



static inline unsigned long level_size(int level)

{

	return 1UL << level_to_offset_bits(level);

}



static inline unsigned long align_to_level(unsigned long pfn, int level)

{

	return (pfn + level_size(level) - 1) & level_mask(level);

}



/* VT-d pages must always be _smaller_ than MM pages. Otherwise things

   are never going to work. */
@@ -434,8 +477,6 @@ void free_iova_mem(struct iova *iova) 
}





static inline int width_to_agaw(int width);



static int __iommu_calculate_agaw(struct intel_iommu *iommu, int max_gaw)

{

	unsigned long sagaw;
@@ -646,51 +687,6 @@ out: 
	spin_unlock_irqrestore(&iommu->lock, flags);

}



/* page table handling */

#define LEVEL_STRIDE		(9)

#define LEVEL_MASK		(((u64)1 << LEVEL_STRIDE) - 1)



static inline int agaw_to_level(int agaw)

{

	return agaw + 2;

}



static inline int agaw_to_width(int agaw)

{

	return 30 + agaw * LEVEL_STRIDE;



}



static inline int width_to_agaw(int width)

{

	return (width - 30) / LEVEL_STRIDE;

}



static inline unsigned int level_to_offset_bits(int level)

{

	return (level - 1) * LEVEL_STRIDE;

}



static inline int pfn_level_offset(unsigned long pfn, int level)

{

	return (pfn >> level_to_offset_bits(level)) & LEVEL_MASK;

}



static inline unsigned long level_mask(int level)

{

	return -1UL << level_to_offset_bits(level);

}



static inline unsigned long level_size(int level)

{

	return 1UL << level_to_offset_bits(level);

}



static inline unsigned long align_to_level(unsigned long pfn, int level)

{

	return (pfn + level_size(level) - 1) & level_mask(level);

}



static struct dma_pte *pfn_to_dma_pte(struct dmar_domain *domain,

				      unsigned long pfn)

{