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thermal: add a warning for temperature emulation feature

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Because this feature is for debuging purposes, it is highly
recommended to do not enable this on production systems.
This patch adds warnings for system integrators, so that
people are aware of this potential security issue.

Signed-off-by: Eduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
This commit is contained in:
Eduardo Valentin 2013-03-26 21:38:34 +00:00 committed by Zhang Rui
parent bffd1f8ac8
commit 8837295a73
2 changed files with 8 additions and 0 deletions
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4
Documentation/thermal/sysfs-api.txt
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@ -265,6 +265,10 @@ emul_temp
Unit: millidegree Celsius
WO, Optional
WARNING: Be careful while enabling this option on production systems,
because userland can easily disable the thermal policy by simply
flooding this sysfs node with low temperature values.
*****************************
* Cooling device attributes *
*****************************

4
drivers/thermal/Kconfig
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@ -86,6 +86,10 @@ config THERMAL_EMULATION
user can manually input temperature and test the different trip
threshold behaviour for simulation purpose.
WARNING: Be careful while enabling this option on production systems,
because userland can easily disable the thermal policy by simply
flooding this sysfs node with low temperature values.
config SPEAR_THERMAL
bool "SPEAr thermal sensor driver"
depends on PLAT_SPEAR