The roundup_pow_of_two function is making use of __roundup_pow_of_two
when the call to __builtin_constant_p fails, which is not implemented in
barebox.
Copied the code from Linux log2.h header.
Signed-off-by: Maxime Ripard <maxime.ripard@xxxxxxxxxxxxxxxxxx>
---
include/linux/log2.h | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/include/linux/log2.h b/include/linux/log2.h
index 389043a..d9913f0 100644
--- a/include/linux/log2.h
+++ b/include/linux/log2.h
@@ -54,6 +54,15 @@ bool is_power_of_2(unsigned long n)
return (n != 0 && ((n & (n - 1)) == 0));
}
+/*
+ * round up to nearest power of two
+ */
+static inline __attribute__((const))
+unsigned long __roundup_pow_of_two(unsigned long n)
+{
+ return 1UL << fls(n - 1);
+}
+
/**
* ilog2 - log of base 2 of 32-bit or a 64-bit unsigned value
* @n - parameter
--
1.7.10.4
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