4.9-stable review patch. If anyone has any objections, please let me know.
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From: Matthew Wilcox willy@linux.intel.com
commit b328daf3b7130098b105c18bdae694ddaad5b6e3 upstream.
I need the following functions for the radix tree:
bitmap_fill bitmap_empty bitmap_full
Copy the implementations from include/linux/bitmap.h
Signed-off-by: Matthew Wilcox willy@linux.intel.com Tested-by: Kirill A. Shutemov kirill.shutemov@linux.intel.com Cc: Konstantin Khlebnikov koct9i@gmail.com Cc: Ross Zwisler ross.zwisler@linux.intel.com Cc: Matthew Wilcox mawilcox@microsoft.com Signed-off-by: Andrew Morton akpm@linux-foundation.org Signed-off-by: Linus Torvalds torvalds@linux-foundation.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- tools/include/linux/bitmap.h | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+)
--- a/tools/include/linux/bitmap.h +++ b/tools/include/linux/bitmap.h @@ -35,6 +35,32 @@ static inline void bitmap_zero(unsigned } }
+static inline void bitmap_fill(unsigned long *dst, unsigned int nbits) +{ + unsigned int nlongs = BITS_TO_LONGS(nbits); + if (!small_const_nbits(nbits)) { + unsigned int len = (nlongs - 1) * sizeof(unsigned long); + memset(dst, 0xff, len); + } + dst[nlongs - 1] = BITMAP_LAST_WORD_MASK(nbits); +} + +static inline int bitmap_empty(const unsigned long *src, unsigned nbits) +{ + if (small_const_nbits(nbits)) + return ! (*src & BITMAP_LAST_WORD_MASK(nbits)); + + return find_first_bit(src, nbits) == nbits; +} + +static inline int bitmap_full(const unsigned long *src, unsigned int nbits) +{ + if (small_const_nbits(nbits)) + return ! (~(*src) & BITMAP_LAST_WORD_MASK(nbits)); + + return find_first_zero_bit(src, nbits) == nbits; +} + static inline int bitmap_weight(const unsigned long *src, int nbits) { if (small_const_nbits(nbits))