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Remove unnecessary castings using void pointer and fix copy_to_user() return value. Also add missing __user markup on the argument of arch_ptrctl(). Signed-off-by: Namhyung Kim <namhyung@gmail.com> Cc: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>