dma-mapping: consolidate the NO_DMA definition in kernel/dma/Kconfig

Have a single definition that architetures can select.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Rich Felker <dalias@libc.org>

diff --git a/arch/m68k/Kconfig b/arch/m68k/Kconfig
index 6ad6cda..8e48836 100644 (file)
--- a/arch/m68k/Kconfig
+++ b/arch/m68k/Kconfig
@@ -17,6 +17,7 @@ config M68K
        select HAVE_COPY_THREAD_TLS
        select GENERIC_IRQ_SHOW
        select GENERIC_ATOMIC64
+       select NO_DMA if !MMU && !COLDFIRE
        select HAVE_UID16
        select VIRT_TO_BUS
        select ARCH_HAVE_NMI_SAFE_CMPXCHG if RMW_INSNS
@@ -60,9 +61,6 @@ config TIME_LOW_RES
 config NO_IOPORT_MAP
        def_bool y
 
-config NO_DMA
-       def_bool (MMU && SUN3) || (!MMU && !COLDFIRE)
-
 config ZONE_DMA
        bool
        default y

diff --git a/arch/m68k/Kconfig.machine b/arch/m68k/Kconfig.machine
index a82651d..17e8c3a 100644 (file)
--- a/arch/m68k/Kconfig.machine
+++ b/arch/m68k/Kconfig.machine
@@ -126,6 +126,7 @@ config SUN3
        depends on MMU
        depends on !MMU_MOTOROLA
        select MMU_SUN3 if MMU
+       select NO_DMA
        select M68020
        help
          This option enables support for the Sun 3 series of workstations

diff --git a/arch/um/Kconfig b/arch/um/Kconfig
index 9318dc6..32c1d19 100644 (file)
--- a/arch/um/Kconfig
+++ b/arch/um/Kconfig
@@ -15,6 +15,7 @@ config UML
        select HAVE_DEBUG_KMEMLEAK
        select HAVE_DEBUG_BUGVERBOSE
        select HAVE_COPY_THREAD_TLS
+       select NO_DMA
        select GENERIC_IRQ_SHOW
        select GENERIC_CPU_DEVICES
        select GENERIC_CLOCKEVENTS
@@ -168,9 +169,6 @@ config MMAPPER
          This driver allows a host file to be used as emulated IO memory inside
          UML.
 
-config NO_DMA
-       def_bool y
-
 config PGTABLE_LEVELS
        int
        default 3 if 3_LEVEL_PGTABLES

diff --git a/kernel/dma/Kconfig b/kernel/dma/Kconfig
index 1da3f44..57533d0 100644 (file)
--- a/kernel/dma/Kconfig
+++ b/kernel/dma/Kconfig
@@ -1,5 +1,8 @@
 # SPDX-License-Identifier: GPL-2.0-only
 
+config NO_DMA
+       bool
+
 config HAS_DMA
        bool
        depends on !NO_DMA