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@@ -82,6 +82,16 @@ static inline int fls (unsigned int x)
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return 32 - __cntlz(x);
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}
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+/**
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+ * __fls - find last (most-significant) set bit in a long word
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+ * @word: the word to search
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+ *
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+ * Undefined if no set bit exists, so code should check against 0 first.
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+ */
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+static inline unsigned long __fls(unsigned long word)
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+{
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+ return 31 - __cntlz(word);
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+}
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#else
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/* Use the generic implementation if we don't have the nsa/nsau instructions. */
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@@ -90,6 +100,7 @@ static inline int fls (unsigned int x)
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# include <asm-generic/bitops/__ffs.h>
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# include <asm-generic/bitops/ffz.h>
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# include <asm-generic/bitops/fls.h>
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+# include <asm-generic/bitops/__fls.h>
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#endif
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