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-rw-r--r--include/linux/thermal.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/thermal.h b/include/linux/thermal.h
index 613c29bd6baf..103fcbe6bdaf 100644
--- a/include/linux/thermal.h
+++ b/include/linux/thermal.h
@@ -43,6 +43,9 @@
/* Default weight of a bound cooling device */
#define THERMAL_WEIGHT_DEFAULT 0
+/* use value, which < 0K, to indicate an invalid/uninitialized temperature */
+#define THERMAL_TEMP_INVALID -274000
+
/* Unit conversion macros */
#define DECI_KELVIN_TO_CELSIUS(t) ({ \
long _t = (t); \