code review 109050043: all: remove 'extern register M *m' from runtime

src/cmd/dist/buildruntime.c

 // Copyright 2012 The Go Authors.  All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
 #include "a.h"
 
 /*
  * Helpers for building pkg/runtime.
  */
 
@@ skipping 112 matching lines @@
 }
 
 static struct {
         char *goarch;
         char *goos;
         char *hdr;
 } zasmhdr[] = {
         {"386", "",
                 "#define        get_tls(r)      MOVL TLS, r\n"
                 "#define        g(r)    0(r)(TLS*1)\n"
-                "#define        m(r)    4(r)(TLS*1)\n"
         },
         {"amd64p32", "",
                 "#define        get_tls(r)      MOVL TLS, r\n"
                 "#define        g(r)    0(r)(TLS*1)\n"
-                "#define        m(r)    4(r)(TLS*1)\n"
         },
         {"amd64", "",
                 "#define        get_tls(r)      MOVQ TLS, r\n"
                 "#define        g(r)    0(r)(TLS*1)\n"
-                "#define        m(r)    8(r)(TLS*1)\n"
         },······
 
         {"arm", "",
         "#define        LR      R14\n"
         },
 };
 
 #define MAXWINCB 2000 /* maximum number of windows callbacks allowed */
 
 // mkzasm writes zasm_$GOOS_$GOARCH.h,
@@ skipping 249 matching lines @@
 
         bfree(&in);
         bfree(&b);
         bfree(&b1);
         bfree(&out);
         vfree(&argv);
         vfree(&lines);
         vfree(&fields);
         vfree(&seen);
 }