printfn
if (printfn(bp->bp_sname, ep)) {
if (printfn(bp->bp_file, ep)) {
printfn(bp, bp + len);
printfn(bp, bp + len);
extern int printfn();
.printfn = __i915_printfn_error,
p->printfn(p, &vaf);
.printfn = __drm_printfn_coredump,
.printfn = __drm_printfn_seq_file,
.printfn = __drm_printfn_info,
.printfn = __drm_printfn_debug,
void (*printfn)(struct drm_printer *p, struct va_format *vaf);
void printfn(const char *, int);
printfn(file->file_name, 1);
printfn(file->file_name, 1);
printfn(fn, !first);