[PATCH v4 02/14] swiotlb: Move is_swiotlb_buffer() to swiotlb.c

[Claire Chang <tientzu@chromium.org>]

Move is_swiotlb_buffer() to swiotlb.c and make io_tlb_{start,end}
static, so we can entirely hide struct swiotlb inside of swiotlb.c in
the following patches.

Signed-off-by: Claire Chang <tientzu@chromium.org>
---
 include/linux/swiotlb.h | 7 +------
 kernel/dma/swiotlb.c    | 7 ++++++-
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h
index 83200f3b042a..041611bf3c2a 100644
--- a/include/linux/swiotlb.h
+++ b/include/linux/swiotlb.h
@@ -70,13 +70,8 @@ dma_addr_t swiotlb_map(struct device *dev, phys_addr_t phys,
 
 #ifdef CONFIG_SWIOTLB
 extern enum swiotlb_force swiotlb_force;
-extern phys_addr_t io_tlb_start, io_tlb_end;
-
-static inline bool is_swiotlb_buffer(phys_addr_t paddr)
-{
-	return paddr >= io_tlb_start && paddr < io_tlb_end;
-}
 
+bool is_swiotlb_buffer(phys_addr_t paddr);
 void __init swiotlb_exit(void);
 unsigned int swiotlb_max_segment(void);
 size_t swiotlb_max_mapping_size(struct device *dev);
diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c
index e180211f6ad9..678490d39e55 100644
--- a/kernel/dma/swiotlb.c
+++ b/kernel/dma/swiotlb.c
@@ -69,7 +69,7 @@ enum swiotlb_force swiotlb_force;
  * swiotlb_tbl_sync_single_*, to see if the memory was in fact allocated by this
  * API.
  */
-phys_addr_t io_tlb_start, io_tlb_end;
+static phys_addr_t io_tlb_start, io_tlb_end;
 
 /*
  * The number of IO TLB blocks (in groups of 64) between io_tlb_start and
@@ -719,6 +719,11 @@ bool is_swiotlb_active(void)
 	return io_tlb_end != 0;
 }
 
+bool is_swiotlb_buffer(phys_addr_t paddr)
+{
+	return paddr >= io_tlb_start && paddr < io_tlb_end;
+}
+
 phys_addr_t get_swiotlb_start(void)
 {
 	return io_tlb_start;
-- 
2.30.0.478.g8a0d178c01-goog