generic_pipe_buf_steal (9)

int generic_pipe_buf_steal(struct pipe_inode_info * pipe, struct pipe_buffer * buf);

pipe

the pipe that the buffer belongs to

buf

the buffer to attempt to steal

This function attempts to steal the struct page attached to buf. If successful, this function returns 0 and returns with the page locked. The caller may then reuse the page for whatever he wishes; the typical use is insertion into a different file page cache.