Kbuild: clear marker out of modpost

Remove the unnecessary functions and variables.

Signed-off-by: Wenji Huang <wenji.huang@oracle.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index fb0f9b7..c16c0a0 100644 (file)
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -460,8 +460,6 @@ static int parse_elf(struct elf_info *info, const char *filename)
                        info->export_unused_gpl_sec = i;
                else if (strcmp(secname, "__ksymtab_gpl_future") == 0)
                        info->export_gpl_future_sec = i;
-               else if (strcmp(secname, "__markers_strings") == 0)
-                       info->markers_strings_sec = i;
 
                if (sechdrs[i].sh_type != SHT_SYMTAB)
                        continue;
@@ -1518,62 +1516,6 @@ static void check_sec_ref(struct module *mod, const char *modname,
        }
 }
 
-static void get_markers(struct elf_info *info, struct module *mod)
-{
-       const Elf_Shdr *sh = &info->sechdrs[info->markers_strings_sec];
-       const char *strings = (const char *) info->hdr + sh->sh_offset;
-       const Elf_Sym *sym, *first_sym, *last_sym;
-       size_t n;
-
-       if (!info->markers_strings_sec)
-               return;
-
-       /*
-        * First count the strings.  We look for all the symbols defined
-        * in the __markers_strings section named __mstrtab_*.  For
-        * these local names, the compiler puts a random .NNN suffix on,
-        * so the names don't correspond exactly.
-        */
-       first_sym = last_sym = NULL;
-       n = 0;
-       for (sym = info->symtab_start; sym < info->symtab_stop; sym++)
-               if (ELF_ST_TYPE(sym->st_info) == STT_OBJECT &&
-                   sym->st_shndx == info->markers_strings_sec &&
-                   !strncmp(info->strtab + sym->st_name,
-                            "__mstrtab_", sizeof "__mstrtab_" - 1)) {
-                       if (first_sym == NULL)
-                               first_sym = sym;
-                       last_sym = sym;
-                       ++n;
-               }
-
-       if (n == 0)
-               return;
-
-       /*
-        * Now collect each name and format into a line for the output.
-        * Lines look like:
-        *      marker_name     vmlinux marker %s format %d
-        * The format string after the second \t can use whitespace.
-        */
-       mod->markers = NOFAIL(malloc(sizeof mod->markers[0] * n));
-       mod->nmarkers = n;
-
-       n = 0;
-       for (sym = first_sym; sym <= last_sym; sym++)
-               if (ELF_ST_TYPE(sym->st_info) == STT_OBJECT &&
-                   sym->st_shndx == info->markers_strings_sec &&
-                   !strncmp(info->strtab + sym->st_name,
-                            "__mstrtab_", sizeof "__mstrtab_" - 1)) {
-                       const char *name = strings + sym->st_value;
-                       const char *fmt = strchr(name, '\0') + 1;
-                       char *line = NULL;
-                       asprintf(&line, "%s\t%s\t%s\n", name, mod->name, fmt);
-                       NOFAIL(line);
-                       mod->markers[n++] = line;
-               }
-}
-
 static void read_symbols(char *modname)
 {
        const char *symname;
@@ -1629,8 +1571,6 @@ static void read_symbols(char *modname)
                get_src_version(modname, mod->srcversion,
                                sizeof(mod->srcversion)-1);
 
-       get_markers(&info, mod);
-
        parse_elf_finish(&info);
 
        /* Our trick to get versioning for module struct etc. - it's
@@ -1985,96 +1925,6 @@ static void write_dump(const char *fname)
        write_if_changed(&buf, fname);
 }
 
-static void add_marker(struct module *mod, const char *name, const char *fmt)
-{
-       char *line = NULL;
-       asprintf(&line, "%s\t%s\t%s\n", name, mod->name, fmt);
-       NOFAIL(line);
-
-       mod->markers = NOFAIL(realloc(mod->markers, ((mod->nmarkers + 1) *
-                                                    sizeof mod->markers[0])));
-       mod->markers[mod->nmarkers++] = line;
-}
-
-static void read_markers(const char *fname)
-{
-       unsigned long size, pos = 0;
-       void *file = grab_file(fname, &size);
-       char *line;
-
-       if (!file)              /* No old markers, silently ignore */
-               return;
-
-       while ((line = get_next_line(&pos, file, size))) {
-               char *marker, *modname, *fmt;
-               struct module *mod;
-
-               marker = line;
-               modname = strchr(marker, '\t');
-               if (!modname)
-                       goto fail;
-               *modname++ = '\0';
-               fmt = strchr(modname, '\t');
-               if (!fmt)
-                       goto fail;
-               *fmt++ = '\0';
-               if (*marker == '\0' || *modname == '\0')
-                       goto fail;
-
-               mod = find_module(modname);
-               if (!mod) {
-                       mod = new_module(modname);
-                       mod->skip = 1;
-               }
-               if (is_vmlinux(modname)) {
-                       have_vmlinux = 1;
-                       mod->skip = 0;
-               }
-
-               if (!mod->skip)
-                       add_marker(mod, marker, fmt);
-       }
-       release_file(file, size);
-       return;
-fail:
-       fatal("parse error in markers list file\n");
-}
-
-static int compare_strings(const void *a, const void *b)
-{
-       return strcmp(*(const char **) a, *(const char **) b);
-}
-
-static void write_markers(const char *fname)
-{
-       struct buffer buf = { };
-       struct module *mod;
-       size_t i;
-
-       for (mod = modules; mod; mod = mod->next)
-               if ((!external_module || !mod->skip) && mod->markers != NULL) {
-                       /*
-                        * Sort the strings so we can skip duplicates when
-                        * we write them out.
-                        */
-                       qsort(mod->markers, mod->nmarkers,
-                             sizeof mod->markers[0], &compare_strings);
-                       for (i = 0; i < mod->nmarkers; ++i) {
-                               char *line = mod->markers[i];
-                               buf_write(&buf, line, strlen(line));
-                               while (i + 1 < mod->nmarkers &&
-                                      !strcmp(mod->markers[i],
-                                              mod->markers[i + 1]))
-                                       free(mod->markers[i++]);
-                               free(mod->markers[i]);
-                       }
-                       free(mod->markers);
-                       mod->markers = NULL;
-               }
-
-       write_if_changed(&buf, fname);
-}
-
 struct ext_sym_list {
        struct ext_sym_list *next;
        const char *file;
@@ -2086,8 +1936,6 @@ int main(int argc, char **argv)
        struct buffer buf = { };
        char *kernel_read = NULL, *module_read = NULL;
        char *dump_write = NULL;
-       char *markers_read = NULL;
-       char *markers_write = NULL;
        int opt;
        int err;
        struct ext_sym_list *extsym_iter;
@@ -2131,12 +1979,6 @@ int main(int argc, char **argv)
                case 'w':
                        warn_unresolved = 1;
                        break;
-                       case 'M':
-                               markers_write = optarg;
-                               break;
-                       case 'K':
-                               markers_read = optarg;
-                               break;
                default:
                        exit(1);
                }
@@ -2191,11 +2033,5 @@ int main(int argc, char **argv)
                     "'make CONFIG_DEBUG_SECTION_MISMATCH=y'\n",
                     sec_mismatch_count);
 
-       if (markers_read)
-               read_markers(markers_read);
-
-       if (markers_write)
-               write_markers(markers_write);
-
        return err;
 }

diff --git a/scripts/mod/modpost.h b/scripts/mod/modpost.h
index 09f58e3..be987a4 100644 (file)
--- a/scripts/mod/modpost.h
+++ b/scripts/mod/modpost.h
@@ -112,8 +112,6 @@ struct module {
        int has_init;
        int has_cleanup;
        struct buffer dev_table_buf;
-       char **markers;
-       size_t nmarkers;
        char         srcversion[25];
 };
 
@@ -128,7 +126,6 @@ struct elf_info {
        Elf_Section  export_gpl_sec;
        Elf_Section  export_unused_gpl_sec;
        Elf_Section  export_gpl_future_sec;
-       Elf_Section  markers_strings_sec;
        const char   *strtab;
        char         *modinfo;
        unsigned int modinfo_len;