arch/s390/Kconfig.debug

   1 menu "Kernel hacking"
   2
   3 config TRACE_IRQFLAGS_SUPPORT
   4         bool
   5         default y
   6
   7 source "lib/Kconfig.debug"
   8
   9 config STRICT_DEVMEM
  10         def_bool y
  11         prompt "Filter access to /dev/mem"
  12         ---help---
  13           This option restricts access to /dev/mem.  If this option is
  14           disabled, you allow userspace access to all memory, including
  15           kernel and userspace memory. Accidental memory access is likely
  16           to be disastrous.
  17           Memory access is required for experts who want to debug the kernel.
  18
  19           If you are unsure, say Y.
  20
  21 config DEBUG_STRICT_USER_COPY_CHECKS
  22         bool "Strict user copy size checks"
  23         ---help---
  24           Enabling this option turns a certain set of sanity checks for user
  25           copy operations into compile time warnings.
  26
  27           The copy_from_user() etc checks are there to help test if there
  28           are sufficient security checks on the length argument of
  29           the copy operation, by having gcc prove that the argument is
  30           within bounds.
  31
  32           If unsure, or if you run an older (pre 4.4) gcc, say N.
  33
  34 endmenu