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Subject[34-longterm 132/260] drivers/pci/intel-iommu.c: fix build with older gcc's
Date
From: Andrew Morton <akpm@linux-foundation.org>

commit df08cdc7ef606509debe7677c439be0ca48790e4 upstream.

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: Martin Mokrejs <mmokrejs@ribosome.natur.cuni.cz>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
---
drivers/pci/intel-iommu.c | 90 +++++++++++++++++++++-----------------------
1 files changed, 43 insertions(+), 47 deletions(-)
diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c
index 4173125..fff8832 100644
--- a/drivers/pci/intel-iommu.c
+++ b/drivers/pci/intel-iommu.c
@@ -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;
@@ -650,51 +691,6 @@ 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)
{
--
1.7.3.3


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