This is needed by the ath5k driver.
Signed-off-by: Hauke Mehrtens <hauke@xxxxxxxxxx>
---
include/linux/compat-2.6.26.h | 18 ++++++++++++++++++
1 files changed, 18 insertions(+), 0 deletions(-)
diff --git a/include/linux/compat-2.6.26.h b/include/linux/compat-2.6.26.h
index 2bee30e..8251177 100644
--- a/include/linux/compat-2.6.26.h
+++ b/include/linux/compat-2.6.26.h
@@ -48,6 +48,24 @@ extern int dev_set_name(struct device *dev, const char *name, ...)
__attribute__((format(printf, 2, 3)));
/**
+ * clamp - return a value clamped to a given range with strict typechecking
+ * @val: current value
+ * @min: minimum allowable value
+ * @max: maximum allowable value
+ *
+ * This macro does strict typechecking of min/max to make sure they are of the
+ * same type as val. See the unnecessary pointer comparisons.
+ */
+#define clamp(val, min, max) ({ \
+ typeof(val) __val = (val); \
+ typeof(min) __min = (min); \
+ typeof(max) __max = (max); \
+ (void) (&__val == &__min); \
+ (void) (&__val == &__max); \
+ __val = __val < __min ? __min: __val; \
+ __val > __max ? __max: __val; })
+
+/**
* clamp_t - return a value clamped to a given range using a given type
* @type: the type of variable to use
* @val: current value
--
1.6.3.3
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