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Use the refcount_t 'atomic' type to implement 'struct kref', this makes kref more robust by bringing saturation semantics. Signed-off-by: Peter Zijlstra (Intel) <[email protected]> Acked-by: Greg Kroah-Hartman <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Signed-off-by: Ingo Molnar <[email protected]>