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Subject[patch 2.6.13] ia64: re-implement dma_get_cache_alignment to avoid EXPORT_SYMBOL
The current ia64 implementation of dma_get_cache_alignment does not
work for modules because it relies on a symbol which is not exported.
Direct access to a global is a little ugly anyway, so this patch
re-implements dma_get_cache_alignment in a manner similar to what is
currently used for x86_64.

Signed-off-by: John W. Linville <>
This patch replaces the patch at the link below:

arch/ia64/kernel/setup.c | 7 +++++++
include/asm-ia64/dma-mapping.h | 7 +------
2 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/arch/ia64/kernel/setup.c b/arch/ia64/kernel/setup.c
--- a/arch/ia64/kernel/setup.c
+++ b/arch/ia64/kernel/setup.c
@@ -79,6 +79,13 @@ unsigned long vga_console_iobase;
unsigned long vga_console_membase;

unsigned long ia64_max_cacheline_size;
+int dma_get_cache_alignment(void)
+ return ia64_max_cacheline_size;
unsigned long ia64_iobase; /* virtual address for I/O accesses */
struct io_space io_space[MAX_IO_SPACES];
diff --git a/include/asm-ia64/dma-mapping.h b/include/asm-ia64/dma-mapping.h
--- a/include/asm-ia64/dma-mapping.h
+++ b/include/asm-ia64/dma-mapping.h
@@ -48,12 +48,7 @@ dma_set_mask (struct device *dev, u64 ma
return 0;

-static inline int
-dma_get_cache_alignment (void)
- extern int ia64_max_cacheline_size;
- return ia64_max_cacheline_size;
+extern int dma_get_cache_alignment(void);

static inline void
dma_cache_sync (void *vaddr, size_t size, enum dma_data_direction dir)
John W. Linville
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