2308acca65
It seems the "make UID16 support optional" patch was checked when it edited the -tiny tree some time ago, but it wasn't checked whether it still matches the current situation when it was submitted for inclusion in -mm. This patch fixes the following bugs: - ARCH_S390X does no longer exist, nowadays this has to be expressed through (S390 && 64BIT) - in five architecture specific Kconfig files the UID16 options weren't removed Additionally, it changes the fragile negative dependencies of UID16 to positive dependencies (new architectures are more likely to not require UID16 support). Signed-off-by: Adrian Bunk <bunk@stusta.de> Acked-by: Matt Mackall <mpm@selenic.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
254 lines
7.2 KiB
Text
254 lines
7.2 KiB
Text
# For a description of the syntax of this configuration file,
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# see Documentation/kbuild/config-language.txt.
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mainmenu "Linux/Xtensa Kernel Configuration"
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config FRAME_POINTER
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bool
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default n
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config XTENSA
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bool
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default y
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help
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Xtensa processors are 32-bit RISC machines designed by Tensilica
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primarily for embedded systems. These processors are both
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configurable and extensible. The Linux port to the Xtensa
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architecture supports all processor configurations and extensions,
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with reasonable minimum requirements. The Xtensa Linux project has
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a home page at <http://xtensa.sourceforge.net/>.
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config RWSEM_XCHGADD_ALGORITHM
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bool
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default y
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config GENERIC_HARDIRQS
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bool
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default y
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source "init/Kconfig"
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menu "Processor type and features"
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choice
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prompt "Xtensa Processor Configuration"
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default XTENSA_CPU_LINUX_BE
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config XTENSA_CPU_LINUX_BE
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bool "linux_be"
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---help---
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The linux_be processor configuration is the baseline Xtensa
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configurations included in this kernel and also used by
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binutils, gcc, and gdb. It contains no TIE, no coprocessors,
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and the following configuration options:
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Code Density Option 2 Misc Special Registers
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NSA/NSAU Instructions 128-bit Data Bus Width
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Processor ID 8K, 2-way I and D Caches
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Zero-Overhead Loops 2 Inst Address Break Registers
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Big Endian 2 Data Address Break Registers
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64 General-Purpose Registers JTAG Interface and Trace Port
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17 Interrupts MMU w/ TLBs and Autorefill
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3 Interrupt Levels 8 Autorefill Ways (I/D TLBs)
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3 Timers Unaligned Exceptions
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endchoice
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config MMU
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bool
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default y
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config XTENSA_UNALIGNED_USER
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bool "Unaligned memory access in use space"
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---help---
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The Xtensa architecture currently does not handle unaligned
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memory accesses in hardware but through an exception handler.
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Per default, unaligned memory accesses are disabled in user space.
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Say Y here to enable unaligned memory access in user space.
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config PREEMPT
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bool "Preemptible Kernel"
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---help---
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This option reduces the latency of the kernel when reacting to
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real-time or interactive events by allowing a low priority process to
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be preempted even if it is in kernel mode executing a system call.
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Unfortunately the kernel code has some race conditions if both
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CONFIG_SMP and CONFIG_PREEMPT are enabled, so this option is
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currently disabled if you are building an SMP kernel.
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Say Y here if you are building a kernel for a desktop, embedded
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or real-time system. Say N if you are unsure.
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config MATH_EMULATION
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bool "Math emulation"
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help
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Can we use information of configuration file?
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config HIGHMEM
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bool "High memory support"
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endmenu
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menu "Platform options"
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choice
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prompt "Xtensa System Type"
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default XTENSA_PLATFORM_ISS
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config XTENSA_PLATFORM_ISS
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bool "ISS"
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help
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ISS is an acronym for Tensilica's Instruction Set Simulator.
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config XTENSA_PLATFORM_XT2000
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bool "XT2000"
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help
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XT2000 is the name of Tensilica's feature-rich emulation platform.
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This hardware is capable of running a full Linux distribution.
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endchoice
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config XTENSA_CALIBRATE_CCOUNT
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bool "Auto calibration of the CPU clock rate"
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---help---
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On some platforms (XT2000, for example), the CPU clock rate can
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vary. The frequency can be determined, however, by measuring
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against a well known, fixed frequency, such as an UART oscillator.
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config XTENSA_CPU_CLOCK
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int "CPU clock rate [MHz]"
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depends on !XTENSA_CALIBRATE_CCOUNT
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default "16"
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config GENERIC_CALIBRATE_DELAY
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bool "Auto calibration of the BogoMIPS value"
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---help---
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The BogoMIPS value can easily be derived from the CPU frequency.
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config CMDLINE_BOOL
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bool "Default bootloader kernel arguments"
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config CMDLINE
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string "Initial kernel command string"
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depends on CMDLINE_BOOL
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default "console=ttyS0,38400 root=/dev/ram"
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help
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On some architectures (EBSA110 and CATS), there is currently no way
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for the boot loader to pass arguments to the kernel. For these
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architectures, you should supply some command-line options at build
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time by entering them here. As a minimum, you should specify the
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memory size and the root device (e.g., mem=64M root=/dev/nfs).
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config SERIAL_CONSOLE
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bool
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depends on XTENSA_PLATFORM_ISS
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default y
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config XTENSA_ISS_NETWORK
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bool
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depends on XTENSA_PLATFORM_ISS
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default y
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source "mm/Kconfig"
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endmenu
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menu "Bus options"
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config PCI
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bool "PCI support" if !XTENSA_PLATFORM_ISS
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depends on !XTENSA_PLATFORM_ISS
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default y
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help
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Find out whether you have a PCI motherboard. PCI is the name of a
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bus system, i.e. the way the CPU talks to the other stuff inside
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your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
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VESA. If you have PCI, say Y, otherwise N.
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The PCI-HOWTO, available from
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<http://www.linuxdoc.org/docs.html#howto>, contains valuable
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information about which PCI hardware does work under Linux and which
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doesn't
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source "drivers/pci/Kconfig"
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config HOTPLUG
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bool "Support for hot-pluggable devices"
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---help---
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Say Y here if you want to plug devices into your computer while
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the system is running, and be able to use them quickly. In many
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cases, the devices can likewise be unplugged at any time too.
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One well known example of this is PCMCIA- or PC-cards, credit-card
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size devices such as network cards, modems or hard drives which are
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plugged into slots found on all modern laptop computers. Another
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example, used on modern desktops as well as laptops, is USB.
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Enable HOTPLUG and KMOD, and build a modular kernel. Get agent
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software (at <http://linux-hotplug.sourceforge.net/>) and install it.
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Then your kernel will automatically call out to a user mode "policy
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agent" (/sbin/hotplug) to load modules and set up software needed
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to use devices as you hotplug them.
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source "drivers/pcmcia/Kconfig"
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source "drivers/pci/hotplug/Kconfig"
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endmenu
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menu "Exectuable file formats"
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# only elf supported
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config KCORE_ELF
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bool
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depends on PROC_FS
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default y
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help
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If you enabled support for /proc file system then the file
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/proc/kcore will contain the kernel core image in ELF format. This
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can be used in gdb:
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$ cd /usr/src/linux ; gdb vmlinux /proc/kcore
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This is especially useful if you have compiled the kernel with the
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"-g" option to preserve debugging information. It is mainly used
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for examining kernel data structures on the live kernel.
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source "fs/Kconfig.binfmt"
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endmenu
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source "net/Kconfig"
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source "drivers/Kconfig"
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source "fs/Kconfig"
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menu "Xtensa initrd options"
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depends on BLK_DEV_INITRD
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config EMBEDDED_RAMDISK
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bool "Embed root filesystem ramdisk into the kernel"
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config EMBEDDED_RAMDISK_IMAGE
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string "Filename of gziped ramdisk image"
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depends on EMBEDDED_RAMDISK
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default "ramdisk.gz"
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help
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This is the filename of the ramdisk image to be built into the
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kernel. Relative pathnames are relative to arch/xtensa/boot/ramdisk/.
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The ramdisk image is not part of the kernel distribution; you must
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provide one yourself.
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endmenu
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source "arch/xtensa/Kconfig.debug"
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source "security/Kconfig"
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source "crypto/Kconfig"
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source "lib/Kconfig"
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