Nesting min_t/max_t macros produces many shadowed variable warnings
due to use of __x. Add a clamp_t macro to linux/kernel.h and use
it in the FIT macro.
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
---
include/linux/kernel.h | 9 +++++++++
include/linux/libata.h | 2 +-
2 files changed, 10 insertions(+), 1 deletions(-)
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 2df44e7..47924ce 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -362,6 +362,15 @@ static inline int __attribute__ ((format (printf, 1, 2))) pr_debug(const char *
#define max_t(type,x,y) \
({ type __x = (x); type __y = (y); __x > __y ? __x: __y; })
+/*
+ * Clamp a value to within a given range using comparisons of a specified type.
+ */
+#define clamp_t(type,val,min,max) ({ \
+ type __val = (val); \
+ type __min = (min); \
+ type __max = (max); \
+ __val = __val < __min ? __min: __val; \
+ __val > __max ? __max: __val; })
/**
* container_of - cast a member of a structure out to the containing structure
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 2e098f9..8adc2a0 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -754,7 +754,7 @@ struct ata_timing {
unsigned short udma; /* t2CYCTYP/2 */
};
-#define FIT(v, vmin, vmax) max_t(short, min_t(short, v, vmax), vmin)
+#define FIT(v, vmin, vmax) clamp_t(short, v, vmin, vmax)
extern const unsigned long sata_deb_timing_normal[];
extern const unsigned long sata_deb_timing_hotplug[];
--
1.5.4.2.200.g99e75
--
