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24e4a8c3e8
The non-scalar ktime_t implementation is basically a timespec which has to be changed to support dates past 2038 on 32bit systems. This patch removes the non-scalar ktime_t implementation, forcing the scalar s64 nanosecond version on all architectures. This may have additional performance overhead on some 32bit systems when converting between ktime_t and timespec structures, however the majority of 32bit systems (arm and i386) were already using scalar ktime_t, so no performance regressions will be seen on those platforms. On affected platforms, I'm open to finding optimizations, including avoiding converting to timespecs where possible. [ tglx: We can now cleanup the ktime_t.tv64 mess, but thats a different issue and we can throw a coccinelle script at it ] Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: John Stultz <john.stultz@linaro.org>
175 lines
3.4 KiB
Plaintext
175 lines
3.4 KiB
Plaintext
# Hexagon configuration
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comment "Linux Kernel Configuration for Hexagon"
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config HEXAGON
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def_bool y
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select HAVE_OPROFILE
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# Other pending projects/to-do items.
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# select HAVE_REGS_AND_STACK_ACCESS_API
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# select HAVE_HW_BREAKPOINT if PERF_EVENTS
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# select ARCH_HAS_CPU_IDLE_WAIT
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# select ARCH_WANT_OPTIONAL_GPIOLIB
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# select ARCH_REQUIRE_GPIOLIB
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# select HAVE_CLK
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# select GENERIC_PENDING_IRQ if SMP
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select GENERIC_ATOMIC64
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select HAVE_PERF_EVENTS
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# GENERIC_ALLOCATOR is used by dma_alloc_coherent()
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select GENERIC_ALLOCATOR
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select GENERIC_IRQ_SHOW
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select HAVE_ARCH_KGDB
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select HAVE_ARCH_TRACEHOOK
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select NO_IOPORT_MAP
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select GENERIC_IOMAP
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select GENERIC_SMP_IDLE_THREAD
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select STACKTRACE_SUPPORT
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select GENERIC_CLOCKEVENTS
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select GENERIC_CLOCKEVENTS_BROADCAST
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select MODULES_USE_ELF_RELA
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select GENERIC_CPU_DEVICES
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select HAVE_DMA_ATTRS
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---help---
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Qualcomm Hexagon is a processor architecture designed for high
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performance and low power across a wide variety of applications.
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config HEXAGON_PHYS_OFFSET
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def_bool y
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---help---
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Platforms that don't load the kernel at zero set this.
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config FRAME_POINTER
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def_bool y
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config LOCKDEP_SUPPORT
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def_bool y
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config PCI
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def_bool n
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config EARLY_PRINTK
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def_bool y
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config MMU
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def_bool y
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config TRACE_IRQFLAGS_SUPPORT
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def_bool y
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config GENERIC_CSUM
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def_bool y
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#
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# Use the generic interrupt handling code in kernel/irq/:
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#
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config GENERIC_IRQ_PROBE
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def_bool y
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config NEED_SG_DMA_LENGTH
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def_bool y
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config RWSEM_GENERIC_SPINLOCK
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def_bool n
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config RWSEM_XCHGADD_ALGORITHM
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def_bool y
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config GENERIC_HWEIGHT
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def_bool y
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config STACKTRACE_SUPPORT
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def_bool y
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select STACKTRACE
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config GENERIC_BUG
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def_bool y
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depends on BUG
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menu "Machine selection"
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choice
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prompt "System type"
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default HEXAGON_COMET
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config HEXAGON_COMET
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bool "Comet Board"
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---help---
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Support for the Comet platform.
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endchoice
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config HEXAGON_ARCH_VERSION
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int "Architecture version"
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default 2
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config CMDLINE
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string "Default kernel command string"
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default ""
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help
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On some platforms, there is currently no way for the boot loader
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to pass arguments to the kernel. For these, you should supply some
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command-line options at build time by entering them here. At a
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minimum, you should specify the memory size and the root device
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(e.g., mem=64M root=/dev/nfs).
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config SMP
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bool "Multi-Processing support"
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---help---
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Enables SMP support in the kernel. If unsure, say "Y"
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config NR_CPUS
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int "Maximum number of CPUs" if SMP
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range 2 6 if SMP
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default "1" if !SMP
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default "6" if SMP
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---help---
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This allows you to specify the maximum number of CPUs which this
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kernel will support. The maximum supported value is 6 and the
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minimum value which makes sense is 2.
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This is purely to save memory - each supported CPU adds
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approximately eight kilobytes to the kernel image.
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choice
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prompt "Kernel page size"
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default PAGE_SIZE_4KB
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---help---
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Changes the default page size; use with caution.
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config PAGE_SIZE_4KB
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bool "4KB"
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config PAGE_SIZE_16KB
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bool "16KB"
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config PAGE_SIZE_64KB
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bool "64KB"
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config PAGE_SIZE_256KB
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bool "256KB"
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endchoice
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source "mm/Kconfig"
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source "kernel/Kconfig.hz"
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endmenu
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source "init/Kconfig"
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source "kernel/Kconfig.freezer"
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source "drivers/Kconfig"
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source "fs/Kconfig"
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menu "Executable File Formats"
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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 "security/Kconfig"
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source "crypto/Kconfig"
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source "lib/Kconfig"
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menu "Kernel hacking"
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source "lib/Kconfig.debug"
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endmenu
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