Commit 0b9bc737 authored by Rob Herring's avatar Rob Herring Committed by Albert ARIBAUD

arm: add __ilog2 function

Add __ilog2 function for ARM. Needed for ahci.c
Signed-off-by: default avatarRob Herring <rob.herring@calxeda.com>
Cc: Albert ARIBAUD <albert.aribaud@free.fr>
parent a60d1e5b
......@@ -106,6 +106,11 @@ static inline int test_bit(int nr, const void * addr)
return ((unsigned char *) addr)[nr >> 3] & (1U << (nr & 7));
}
static inline int __ilog2(unsigned int x)
{
return generic_fls(x) - 1;
}
/*
* ffz = Find First Zero in word. Undefined if no zero exists,
* so code should check against ~0UL first..
......
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