swh:1:snp:173f8deb0c56c557784b4fd217e7608ac6197844
- v5.9-rc8
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- v5.0
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Tip revision: 19583ca584d6f574384e17fe7613dfaeadcdc4a6 authored by Linus Torvalds on 03 August 2014, 22:25:02 UTC
Linux 3.16
Linux 3.16
Tip revision: 19583ca
Kconfig.debug
menu "Kernel hacking"
source "lib/Kconfig.debug"
config FRAME_POINTER
bool
default y
config STRICT_DEVMEM
bool "Filter access to /dev/mem"
depends on MMU
help
If this option is disabled, you allow userspace (root) access to all
of memory, including kernel and userspace memory. Accidental
access to this is obviously disastrous, but specific access can
be used by people debugging the kernel.
If this option is switched on, the /dev/mem file only allows
userspace access to memory mapped peripherals.
If in doubt, say Y.
config PID_IN_CONTEXTIDR
bool "Write the current PID to the CONTEXTIDR register"
help
Enabling this option causes the kernel to write the current PID to
the CONTEXTIDR register, at the expense of some additional
instructions during context switch. Say Y here only if you are
planning to use hardware trace tools with this kernel.
endmenu