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72480ef863
Recently the __copy_tofrom_user routine was modified to avoid doing prefetches past the end of the source array. However, in doing so we introduced a bug in that it now returns the wrong value for the number of bytes not copied when a fault is encountered. This fixes it to return the correct number. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>