scatterlist: move the NEED_SG_DMA_LENGTH config symbol to lib/Kconfig

This way we have one central definition of it, and user can select it as
needed.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>

16 files changed, 15 insertions, 46 deletions

diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig
index 3ff735a722af..8e6a67ecf069 100644
--- a/arch/alpha/Kconfig
+++ b/arch/alpha/Kconfig
@@ -10,6 +10,7 @@ config ALPHA
 	select HAVE_OPROFILE
 	select HAVE_PCSPKR_PLATFORM
 	select HAVE_PERF_EVENTS
+	select NEED_SG_DMA_LENGTH
 	select VIRT_TO_BUS
 	select GENERIC_IRQ_PROBE
 	select AUTO_IRQ_AFFINITY if SMP
@@ -70,9 +71,6 @@ config ARCH_DMA_ADDR_T_64BIT
 config NEED_DMA_MAP_STATE
        def_bool y
 
-config NEED_SG_DMA_LENGTH
-	def_bool y
-
 config GENERIC_ISA_DMA
 	bool
 	default y
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 6bbf7b928b4f..0d2930df7580 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -118,9 +118,6 @@ config ARM_HAS_SG_CHAIN
 	select ARCH_HAS_SG_CHAIN
 	bool
 
-config NEED_SG_DMA_LENGTH
-	bool
-
 config ARM_DMA_USE_IOMMU
 	bool
 	select ARM_HAS_SG_CHAIN
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index a553deb60fc2..eab772a51aad 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -132,6 +132,7 @@ config ARM64
 	select IRQ_FORCED_THREADING
 	select MODULES_USE_ELF_RELA
 	select MULTI_IRQ_HANDLER
+	select NEED_SG_DMA_LENGTH
 	select NO_BOOTMEM
 	select OF
 	select OF_EARLY_FLATTREE
@@ -242,9 +243,6 @@ config ARCH_DMA_ADDR_T_64BIT
 config NEED_DMA_MAP_STATE
 	def_bool y
 
-config NEED_SG_DMA_LENGTH
-	def_bool y
-
 config SMP
 	def_bool y
 
diff --git a/arch/hexagon/Kconfig b/arch/hexagon/Kconfig
index 76d2f20d525e..37adb2003033 100644
--- a/arch/hexagon/Kconfig
+++ b/arch/hexagon/Kconfig
@@ -19,6 +19,7 @@ config HEXAGON
 	select GENERIC_IRQ_SHOW
 	select HAVE_ARCH_KGDB
 	select HAVE_ARCH_TRACEHOOK
+	select NEED_SG_DMA_LENGTH
 	select NO_IOPORT_MAP
 	select GENERIC_IOMAP
 	select GENERIC_SMP_IDLE_THREAD
@@ -63,9 +64,6 @@ config GENERIC_CSUM
 config GENERIC_IRQ_PROBE
 	def_bool y
 
-config NEED_SG_DMA_LENGTH
-	def_bool y
-
 config RWSEM_GENERIC_SPINLOCK
 	def_bool n
 
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index ec2a39741f91..5381e46fe21d 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -53,6 +53,7 @@ config IA64
 	select MODULES_USE_ELF_RELA
 	select ARCH_USE_CMPXCHG_LOCKREF
 	select HAVE_ARCH_AUDITSYSCALL
+	select NEED_SG_DMA_LENGTH
 	default y
 	help
 	  The Itanium Processor Family is Intel's 64-bit successor to
@@ -83,9 +84,6 @@ config ARCH_DMA_ADDR_T_64BIT
 config NEED_DMA_MAP_STATE
 	def_bool y
 
-config NEED_SG_DMA_LENGTH
-	def_bool y
-
 config SWIOTLB
        bool
 
diff --git a/arch/mips/cavium-octeon/Kconfig b/arch/mips/cavium-octeon/Kconfig
index 647ed158ac98..5d73041547a7 100644
--- a/arch/mips/cavium-octeon/Kconfig
+++ b/arch/mips/cavium-octeon/Kconfig
@@ -67,9 +67,6 @@ config CAVIUM_OCTEON_LOCK_L2_MEMCPY
 	help
 	  Lock the kernel's implementation of memcpy() into L2.
 
-config NEED_SG_DMA_LENGTH
-	bool
-
 config SWIOTLB
 	def_bool y
 	select DMA_DIRECT_OPS
diff --git a/arch/mips/loongson64/Kconfig b/arch/mips/loongson64/Kconfig
index 5efb2e63878e..641a1477031e 100644
--- a/arch/mips/loongson64/Kconfig
+++ b/arch/mips/loongson64/Kconfig
@@ -130,9 +130,6 @@ config LOONGSON_UART_BASE
 	default y
 	depends on EARLY_PRINTK || SERIAL_8250
 
-config NEED_SG_DMA_LENGTH
-	bool
-
 config SWIOTLB
 	bool "Soft IOMMU Support for All-Memory DMA"
 	default y
diff --git a/arch/mips/netlogic/Kconfig b/arch/mips/netlogic/Kconfig
index 5c5ee0e05a17..412351c5acc6 100644
--- a/arch/mips/netlogic/Kconfig
+++ b/arch/mips/netlogic/Kconfig
@@ -83,7 +83,4 @@ endif
 config NLM_COMMON
 	bool
 
-config NEED_SG_DMA_LENGTH
-	bool
-
 endif
diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig
index fc5a574c3482..89caea87556e 100644
--- a/arch/parisc/Kconfig
+++ b/arch/parisc/Kconfig
@@ -51,6 +51,7 @@ config PARISC
 	select GENERIC_CLOCKEVENTS
 	select ARCH_NO_COHERENT_DMA_MMAP
 	select CPU_NO_EFFICIENT_FFS
+	select NEED_SG_DMA_LENGTH
 
 	help
 	  The PA-RISC microprocessor is designed by Hewlett-Packard and used
@@ -114,9 +115,6 @@ config STACKTRACE_SUPPORT
 config NEED_DMA_MAP_STATE
 	def_bool y
 
-config NEED_SG_DMA_LENGTH
-	def_bool y
-
 config ISA_DMA_API
 	bool
 
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index bd1cd84cb06f..fbb4d5d72339 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -226,6 +226,7 @@ config PPC
 	select IRQ_DOMAIN
 	select IRQ_FORCED_THREADING
 	select MODULES_USE_ELF_RELA
+	select NEED_SG_DMA_LENGTH
 	select NO_BOOTMEM
 	select OF
 	select OF_EARLY_FLATTREE
@@ -909,9 +910,6 @@ config ZONE_DMA
 config NEED_DMA_MAP_STATE
 	def_bool (PPC64 || NOT_COHERENT_CACHE)
 
-config NEED_SG_DMA_LENGTH
-	def_bool y
-
 config GENERIC_ISA_DMA
 	bool
 	depends on ISA_DMA_API
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 89c0c726ca92..a36b4e4e010a 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -710,6 +710,7 @@ menuconfig PCI
 	select PCI_MSI
 	select IOMMU_HELPER
 	select IOMMU_SUPPORT
+	select NEED_SG_DMA_LENGTH
 
 	help
 	  Enable PCI support.
@@ -734,9 +735,6 @@ config PCI_DOMAINS
 config HAS_IOMEM
 	def_bool PCI
 
-config NEED_SG_DMA_LENGTH
-	def_bool PCI
-
 config NEED_DMA_MAP_STATE
 	def_bool PCI
 
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index 61f4e2e042aa..a0f1c4a8a093 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -49,6 +49,8 @@ config SUPERH
 	select HAVE_ARCH_AUDITSYSCALL
 	select HAVE_FUTEX_CMPXCHG if FUTEX
 	select HAVE_NMI
+	select NEED_SG_DMA_LENGTH
+
 	help
 	  The SuperH is a RISC processor targeted for use in embedded systems
 	  and consumer electronics; it was also used in the Sega Dreamcast
@@ -162,9 +164,6 @@ config DMA_NONCOHERENT
 config NEED_DMA_MAP_STATE
 	def_bool DMA_NONCOHERENT
 
-config NEED_SG_DMA_LENGTH
-	def_bool y
-
 config PGTABLE_LEVELS
 	default 3 if X2TLB
 	default 2
diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index 3c1740a860ec..a2f4483d9b6e 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -43,6 +43,7 @@ config SPARC
 	select ARCH_HAS_SG_CHAIN
 	select CPU_NO_EFFICIENT_FFS
 	select LOCKDEP_SMALL if LOCKDEP
+	select NEED_SG_DMA_LENGTH
 
 config SPARC32
 	def_bool !64BIT
@@ -145,9 +146,6 @@ config ZONE_DMA
 config NEED_DMA_MAP_STATE
 	def_bool y
 
-config NEED_SG_DMA_LENGTH
-	def_bool y
-
 config GENERIC_ISA_DMA
 	bool
 	default y if SPARC32
diff --git a/arch/unicore32/mm/Kconfig b/arch/unicore32/mm/Kconfig
index 3f105e00c432..1d9fed0ada71 100644
--- a/arch/unicore32/mm/Kconfig
+++ b/arch/unicore32/mm/Kconfig
@@ -43,7 +43,4 @@ config CPU_TLB_SINGLE_ENTRY_DISABLE
 config SWIOTLB
 	def_bool y
 	select DMA_DIRECT_OPS
-
-config NEED_SG_DMA_LENGTH
-	def_bool SWIOTLB
-
+	select NEED_SG_DMA_LENGTH
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 4faa505ab8ec..9cbadd6ba27b 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -183,6 +183,7 @@ config X86
 	select HAVE_UNSTABLE_SCHED_CLOCK
 	select HAVE_USER_RETURN_NOTIFIER
 	select IRQ_FORCED_THREADING
+	select NEED_SG_DMA_LENGTH
 	select PCI_LOCKLESS_CONFIG
 	select PERF_EVENTS
 	select RTC_LIB
@@ -239,9 +240,6 @@ config NEED_DMA_MAP_STATE
 	def_bool y
 	depends on X86_64 || INTEL_IOMMU || DMA_API_DEBUG || SWIOTLB
 
-config NEED_SG_DMA_LENGTH
-	def_bool y
-
 config GENERIC_ISA_DMA
 	def_bool y
 	depends on ISA_DMA_API
diff --git a/lib/Kconfig b/lib/Kconfig
index 2f6908577534..aeb7fae16bc2 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -429,6 +429,9 @@ config SGL_ALLOC
 	bool
 	default n
 
+config NEED_SG_DMA_LENGTH
+	bool
+
 config IOMMU_HELPER
 	bool