BUF_PAGE_HDR_SIZE 368 kernel/trace/ring_buffer.c #define BUF_PAGE_SIZE (PAGE_SIZE - BUF_PAGE_HDR_SIZE) BUF_PAGE_HDR_SIZE 1945 kernel/trace/ring_buffer.c return (addr & ~PAGE_MASK) - BUF_PAGE_HDR_SIZE; BUF_PAGE_HDR_SIZE 4721 kernel/trace/ring_buffer.c if (len <= BUF_PAGE_HDR_SIZE) BUF_PAGE_HDR_SIZE 4724 kernel/trace/ring_buffer.c len -= BUF_PAGE_HDR_SIZE;