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Linux/lib/vdso/Kconfig

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  1 # SPDX-License-Identifier: GPL-2.0
  2 
  3 config HAVE_GENERIC_VDSO
  4         bool
  5 
  6 if HAVE_GENERIC_VDSO
  7 
  8 config GENERIC_GETTIMEOFDAY
  9         bool
 10         help
 11           This is a generic implementation of gettimeofday vdso.
 12           Each architecture that enables this feature has to
 13           provide the fallback implementation.
 14 
 15 config GENERIC_VDSO_32
 16         bool
 17         depends on GENERIC_GETTIMEOFDAY && !64BIT
 18         help
 19           This config option helps to avoid possible performance issues
 20           in 32 bit only architectures.
 21 
 22 config GENERIC_COMPAT_VDSO
 23         bool
 24         help
 25           This config option enables the compat VDSO layer.
 26 
 27 config GENERIC_VDSO_TIME_NS
 28         bool
 29         help
 30           Selected by architectures which support time namespaces in the
 31           VDSO
 32 
 33 config GENERIC_VDSO_OVERFLOW_PROTECT
 34         bool
 35         help
 36           Select to add multiplication overflow protection to the VDSO
 37           time getter functions for the price of an extra conditional
 38           in the hotpath.
 39 
 40 endif
 41 
 42 config VDSO_GETRANDOM
 43         bool
 44         help
 45           Selected by architectures that support vDSO getrandom().

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