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2012-07-30string: introduce memweight()Akinobu Mita1-0/+38
memweight() is the function that counts the total number of bits set in memory area. Unlike bitmap_weight(), memweight() takes pointer and size in bytes to specify a memory area which does not need to be aligned to long-word boundary. [[email protected]: rename `w' to `ret'] Signed-off-by: Akinobu Mita <[email protected]> Cc: Anders Larsen <[email protected]> Cc: Alasdair Kergon <[email protected]> Cc: Laurent Pinchart <[email protected]> Cc: Mark Fasheh <[email protected]> Cc: Joel Becker <[email protected]> Cc: Jan Kara <[email protected]> Cc: Andreas Dilger <[email protected]> Cc: "Theodore Ts'o" <[email protected]> Cc: Matthew Wilcox <[email protected]> Cc: Mauro Carvalho Chehab <[email protected]> Cc: Tony Luck <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>