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b9d078ca44
commit f911d73105 upstream.
futex_atomic_cmpxchg_inatomic() does not work on UML because
it triggers a copy_from_user() in kernel context.
On UML copy_from_user() can only be used if the kernel was called
by a real user space process such that UML can use ptrace()
to fetch the value.
Reported-by: Miklos Szeredi <miklos@szeredi.hu>
Suggested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Richard Weinberger <richard@nod.at>
Tested-by: Daniel Walter <d.walter@0x90.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
62 lines
722 B
Plaintext
62 lines
722 B
Plaintext
config UML
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bool
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default y
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select HAVE_ARCH_AUDITSYSCALL
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select HAVE_UID16
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select HAVE_FUTEX_CMPXCHG if FUTEX
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select GENERIC_IRQ_SHOW
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select GENERIC_CPU_DEVICES
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select GENERIC_IO
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select GENERIC_CLOCKEVENTS
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select TTY # Needed for line.c
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config MMU
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bool
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default y
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config NO_IOMEM
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def_bool y
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config ISA
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bool
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config SBUS
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bool
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config PCI
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bool
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config PCMCIA
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bool
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# Yet to do!
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config TRACE_IRQFLAGS_SUPPORT
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bool
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default n
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config LOCKDEP_SUPPORT
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bool
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default y
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config STACKTRACE_SUPPORT
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bool
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default y
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select STACKTRACE
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config GENERIC_CALIBRATE_DELAY
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bool
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default y
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config GENERIC_BUG
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bool
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default y
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depends on BUG
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config HZ
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int
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default 100
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config SUBARCH
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string
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option env="SUBARCH"
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