asm-generic: remove ISA_DMA_THRESHOLD in scatterlist.h

This is the first half of the attempt to use asm-generic/scatterlist.h
on every architecture.

There are only two ways to define scatterlist structure. So it's easy
to convert every architecture to use asm-generic/scatterlist.h.

This patch:

The trick for ISA_DMA_THRESHOLD in asm-generic/scatterlist.h doesn't work
for powerpc.  This lets architectures defin ISA_DMA_THRESHOLD.

Hopefully, we can remove ISA_DMA_THRESHOLD in the future; we can do better
to decide if the bouncing is necessary or not.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/arch/microblaze/include/asm/scatterlist.h b/arch/microblaze/include/asm/scatterlist.h
index 35d786fe93ae0dcba7e1cf434606e9e61d1b05c2..be44d94cba549d386e1b6a3abaed0d88b8628336 100644 (file)
--- a/arch/microblaze/include/asm/scatterlist.h
+++ b/arch/microblaze/include/asm/scatterlist.h
@@ -1 +1,3 @@
+#define ISA_DMA_THRESHOLD      (~0UL)
+
 #include <asm-generic/scatterlist.h>

diff --git a/arch/s390/include/asm/scatterlist.h b/arch/s390/include/asm/scatterlist.h
index 35d786fe93ae0dcba7e1cf434606e9e61d1b05c2..be44d94cba549d386e1b6a3abaed0d88b8628336 100644 (file)
--- a/arch/s390/include/asm/scatterlist.h
+++ b/arch/s390/include/asm/scatterlist.h
@@ -1 +1,3 @@
+#define ISA_DMA_THRESHOLD      (~0UL)
+
 #include <asm-generic/scatterlist.h>

diff --git a/arch/score/include/asm/scatterlist.h b/arch/score/include/asm/scatterlist.h
index 9f533b8362c788170bfb451a02b40bbe9771829f..4fa1a665821557a0af3f25912bc679df36254917 100644 (file)
--- a/arch/score/include/asm/scatterlist.h
+++ b/arch/score/include/asm/scatterlist.h
@@ -1,6 +1,8 @@
 #ifndef _ASM_SCORE_SCATTERLIST_H
 #define _ASM_SCORE_SCATTERLIST_H
 
+#define ISA_DMA_THRESHOLD      (~0UL)
+
 #include <asm-generic/scatterlist.h>
 
 #endif /* _ASM_SCORE_SCATTERLIST_H */

diff --git a/arch/sparc/include/asm/scatterlist.h b/arch/sparc/include/asm/scatterlist.h
index d1120257b0330cd25f6d6db0cac22ef700917c29..0fa0d6da2107f393771ad899b193ae4aab457dc6 100644 (file)
--- a/arch/sparc/include/asm/scatterlist.h
+++ b/arch/sparc/include/asm/scatterlist.h
@@ -3,6 +3,8 @@
 
 #define sg_dma_len(sg)         ((sg)->dma_length)
 
+#define ISA_DMA_THRESHOLD      (~0UL)
+
 #include <asm-generic/scatterlist.h>
 
 #endif /* !(_SPARC_SCATTERLIST_H) */

diff --git a/include/asm-generic/scatterlist.h b/include/asm-generic/scatterlist.h
index 8b9454496a7c901edd8723586a98981916faeac8..51a7a43ab0ceea1d7a8949522db71a16600ce10a 100644 (file)
--- a/include/asm-generic/scatterlist.h
+++ b/include/asm-generic/scatterlist.h
@@ -34,10 +34,6 @@ struct scatterlist {
 #endif /* 64 bit */
 #endif /* sg_dma_len */
 
-#ifndef ISA_DMA_THRESHOLD
-#define ISA_DMA_THRESHOLD      (~0UL)
-#endif
-
 #define ARCH_HAS_SG_CHAIN
 
 #endif /* __ASM_GENERIC_SCATTERLIST_H */