1 files changed, 94 insertions, 65 deletions

diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 20923613467c..f6127b9f5aca 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -503,6 +503,11 @@ static int ignore_undef_symbol(struct elf_info *info, const char *symname)
                     strncmp(symname, "_rest32gpr_", sizeof("_rest32gpr_") - 1) == 0 ||
                     strncmp(symname, "_save32gpr_", sizeof("_save32gpr_") - 1) == 0)
                         return 1;
+        if (info->hdr->e_machine == EM_PPC64)
+                /* Special register function linked on all modules during final link of .ko */
+                if (strncmp(symname, "_restgpr0_", sizeof("_restgpr0_") - 1) == 0 ||
+                    strncmp(symname, "_savegpr0_", sizeof("_savegpr0_") - 1) == 0)
+                        return 1;
         /* Do not ignore this symbol */
         return 0;
 }
@@ -781,10 +786,13 @@ static void check_section(const char *modname, struct elf_info *elf,
 #define ALL_EXIT_TEXT_SECTIONS \
         ".exit.text$", ".devexit.text$", ".cpuexit.text$", ".memexit.text$"
 
-#define ALL_INIT_SECTIONS INIT_SECTIONS, DEV_INIT_SECTIONS, \
-        CPU_INIT_SECTIONS, MEM_INIT_SECTIONS
-#define ALL_EXIT_SECTIONS EXIT_SECTIONS, DEV_EXIT_SECTIONS, \
-        CPU_EXIT_SECTIONS, MEM_EXIT_SECTIONS
+#define ALL_XXXINIT_SECTIONS DEV_INIT_SECTIONS, CPU_INIT_SECTIONS, \
+        MEM_INIT_SECTIONS
+#define ALL_XXXEXIT_SECTIONS DEV_EXIT_SECTIONS, CPU_EXIT_SECTIONS, \
+        MEM_EXIT_SECTIONS
+
+#define ALL_INIT_SECTIONS INIT_SECTIONS, ALL_XXXINIT_SECTIONS
+#define ALL_EXIT_SECTIONS EXIT_SECTIONS, ALL_XXXEXIT_SECTIONS
 
 #define DATA_SECTIONS ".data$", ".data.rel$"
 #define TEXT_SECTIONS ".text$"
@@ -814,33 +822,29 @@ static const char *data_sections[] = { DATA_SECTIONS, NULL };
 
 
 /* symbols in .data that may refer to init/exit sections */
-static const char *symbol_white_list[] =
-{
-        "*driver",
-        "*_template", /* scsi uses *_template a lot */
-        "*_timer",    /* arm uses ops structures named _timer a lot */
-        "*_sht",      /* scsi also used *_sht to some extent */
-        "*_ops",
-        "*_probe",
-        "*_probe_one",
-        "*_console",
-        NULL
-};
+#define DEFAULT_SYMBOL_WHITE_LIST                                       \
+        "*driver",                                                      \
+        "*_template", /* scsi uses *_template a lot */                  \
+        "*_timer",    /* arm uses ops structures named _timer a lot */  \
+        "*_sht",      /* scsi also used *_sht to some extent */         \
+        "*_ops",                                                        \
+        "*_probe",                                                      \
+        "*_probe_one",                                                  \
+        "*_console"
 
 static const char *head_sections[] = { ".head.text*", NULL };
 static const char *linker_symbols[] =
         { "__init_begin", "_sinittext", "_einittext", NULL };
 
 enum mismatch {
-        NO_MISMATCH,
-        TEXT_TO_INIT,
-        DATA_TO_INIT,
-        TEXT_TO_EXIT,
-        DATA_TO_EXIT,
-        XXXINIT_TO_INIT,
-        XXXEXIT_TO_EXIT,
-        INIT_TO_EXIT,
-        EXIT_TO_INIT,
+        TEXT_TO_ANY_INIT,
+        DATA_TO_ANY_INIT,
+        TEXT_TO_ANY_EXIT,
+        DATA_TO_ANY_EXIT,
+        XXXINIT_TO_SOME_INIT,
+        XXXEXIT_TO_SOME_EXIT,
+        ANY_INIT_TO_ANY_EXIT,
+        ANY_EXIT_TO_ANY_INIT,
         EXPORT_TO_INIT_EXIT,
 };
 
@@ -848,6 +852,7 @@ struct sectioncheck {
         const char *fromsec[20];
         const char *tosec[20];
         enum mismatch mismatch;
+        const char *symbol_white_list[20];
 };
 
 const struct sectioncheck sectioncheck[] = {
@@ -857,80 +862,103 @@ const struct sectioncheck sectioncheck[] = {
 {
         .fromsec = { TEXT_SECTIONS, NULL },
         .tosec   = { ALL_INIT_SECTIONS, NULL },
-        .mismatch = TEXT_TO_INIT,
+        .mismatch = TEXT_TO_ANY_INIT,
+        .symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
 },
 {
         .fromsec = { DATA_SECTIONS, NULL },
-        .tosec   = { ALL_INIT_SECTIONS, NULL },
-        .mismatch = DATA_TO_INIT,
+        .tosec   = { ALL_XXXINIT_SECTIONS, NULL },
+        .mismatch = DATA_TO_ANY_INIT,
+        .symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
+},
+{
+        .fromsec = { DATA_SECTIONS, NULL },
+        .tosec   = { INIT_SECTIONS, NULL },
+        .mismatch = DATA_TO_ANY_INIT,
+        .symbol_white_list = {
+                "*_template", "*_timer", "*_sht", "*_ops",
+                "*_probe", "*_probe_one", "*_console", NULL
+        },
 },
 {
         .fromsec = { TEXT_SECTIONS, NULL },
         .tosec   = { ALL_EXIT_SECTIONS, NULL },
-        .mismatch = TEXT_TO_EXIT,
+        .mismatch = TEXT_TO_ANY_EXIT,
+        .symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
 },
 {
         .fromsec = { DATA_SECTIONS, NULL },
         .tosec   = { ALL_EXIT_SECTIONS, NULL },
-        .mismatch = DATA_TO_EXIT,
+        .mismatch = DATA_TO_ANY_EXIT,
+        .symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
 },
 /* Do not reference init code/data from devinit/cpuinit/meminit code/data */
 {
-        .fromsec = { DEV_INIT_SECTIONS, CPU_INIT_SECTIONS, MEM_INIT_SECTIONS, NULL },
+        .fromsec = { ALL_XXXINIT_SECTIONS, NULL },
         .tosec   = { INIT_SECTIONS, NULL },
-        .mismatch = XXXINIT_TO_INIT,
+        .mismatch = XXXINIT_TO_SOME_INIT,
+        .symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
 },
 /* Do not reference cpuinit code/data from meminit code/data */
 {
         .fromsec = { MEM_INIT_SECTIONS, NULL },
         .tosec   = { CPU_INIT_SECTIONS, NULL },
-        .mismatch = XXXINIT_TO_INIT,
+        .mismatch = XXXINIT_TO_SOME_INIT,
+        .symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
 },
 /* Do not reference meminit code/data from cpuinit code/data */
 {
         .fromsec = { CPU_INIT_SECTIONS, NULL },
         .tosec   = { MEM_INIT_SECTIONS, NULL },
-        .mismatch = XXXINIT_TO_INIT,
+        .mismatch = XXXINIT_TO_SOME_INIT,
+        .symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
 },
 /* Do not reference exit code/data from devexit/cpuexit/memexit code/data */
 {
-        .fromsec = { DEV_EXIT_SECTIONS, CPU_EXIT_SECTIONS, MEM_EXIT_SECTIONS, NULL },
+        .fromsec = { ALL_XXXEXIT_SECTIONS, NULL },
         .tosec   = { EXIT_SECTIONS, NULL },
-        .mismatch = XXXEXIT_TO_EXIT,
+        .mismatch = XXXEXIT_TO_SOME_EXIT,
+        .symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
 },
 /* Do not reference cpuexit code/data from memexit code/data */
 {
         .fromsec = { MEM_EXIT_SECTIONS, NULL },
         .tosec   = { CPU_EXIT_SECTIONS, NULL },
-        .mismatch = XXXEXIT_TO_EXIT,
+        .mismatch = XXXEXIT_TO_SOME_EXIT,
+        .symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
 },
 /* Do not reference memexit code/data from cpuexit code/data */
 {
         .fromsec = { CPU_EXIT_SECTIONS, NULL },
         .tosec   = { MEM_EXIT_SECTIONS, NULL },
-        .mismatch = XXXEXIT_TO_EXIT,
+        .mismatch = XXXEXIT_TO_SOME_EXIT,
+        .symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
 },
 /* Do not use exit code/data from init code */
 {
         .fromsec = { ALL_INIT_SECTIONS, NULL },
         .tosec   = { ALL_EXIT_SECTIONS, NULL },
-        .mismatch = INIT_TO_EXIT,
+        .mismatch = ANY_INIT_TO_ANY_EXIT,
+        .symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
 },
 /* Do not use init code/data from exit code */
 {
         .fromsec = { ALL_EXIT_SECTIONS, NULL },
         .tosec   = { ALL_INIT_SECTIONS, NULL },
-        .mismatch = EXIT_TO_INIT,
+        .mismatch = ANY_EXIT_TO_ANY_INIT,
+        .symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
 },
 /* Do not export init/exit functions or data */
 {
         .fromsec = { "__ksymtab*", NULL },
         .tosec   = { INIT_SECTIONS, EXIT_SECTIONS, NULL },
-        .mismatch = EXPORT_TO_INIT_EXIT
+        .mismatch = EXPORT_TO_INIT_EXIT,
+        .symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
 }
 };
 
-static int section_mismatch(const char *fromsec, const char *tosec)
+static const struct sectioncheck *section_mismatch(
+                const char *fromsec, const char *tosec)
 {
         int i;
         int elems = sizeof(sectioncheck) / sizeof(struct sectioncheck);
@@ -939,10 +967,10 @@ static int section_mismatch(const char *fromsec, const char *tosec)
         for (i = 0; i < elems; i++) {
                 if (match(fromsec, check->fromsec) &&
                     match(tosec, check->tosec))
-                        return check->mismatch;
+                        return check;
                 check++;
         }
-        return NO_MISMATCH;
+        return NULL;
 }
 
 /**
@@ -961,7 +989,7 @@ static int section_mismatch(const char *fromsec, const char *tosec)
  * Pattern 2:
  *   Many drivers utilise a *driver container with references to
  *   add, remove, probe functions etc.
- *   These functions may often be marked __init and we do not want to
+ *   These functions may often be marked __devinit and we do not want to
  *   warn here.
  *   the pattern is identified by:
  *   tosec   = init or exit section
@@ -982,7 +1010,8 @@ static int section_mismatch(const char *fromsec, const char *tosec)
  *   refsymname = __init_begin, _sinittext, _einittext
  *
  **/
-static int secref_whitelist(const char *fromsec, const char *fromsym,
+static int secref_whitelist(const struct sectioncheck *mismatch,
+                            const char *fromsec, const char *fromsym,
                             const char *tosec, const char *tosym)
 {
         /* Check for pattern 1 */
@@ -994,7 +1023,7 @@ static int secref_whitelist(const char *fromsec, const char *fromsym,
         /* Check for pattern 2 */
         if (match(tosec, init_exit_sections) &&
             match(fromsec, data_sections) &&
-            match(fromsym, symbol_white_list))
+            match(fromsym, mismatch->symbol_white_list))
                 return 0;
 
         /* Check for pattern 3 */
@@ -1155,7 +1184,8 @@ static int is_function(Elf_Sym *sym)
  * Try to find symbols near it so user can find it.
  * Check whitelist before warning - it may be a false positive.
  */
-static void report_sec_mismatch(const char *modname, enum mismatch mismatch,
+static void report_sec_mismatch(const char *modname,
+                                const struct sectioncheck *mismatch,
                                 const char *fromsec,
                                 unsigned long long fromaddr,
                                 const char *fromsym,
@@ -1186,8 +1216,8 @@ static void report_sec_mismatch(const char *modname, enum mismatch mismatch,
              modname, fromsec, fromaddr, from, fromsym, from_p, to, tosec,
              tosym, to_p);
 
-        switch (mismatch) {
-        case TEXT_TO_INIT:
+        switch (mismatch->mismatch) {
+        case TEXT_TO_ANY_INIT:
                 fprintf(stderr,
                 "The function %s%s() references\n"
                 "the %s %s%s%s.\n"
@@ -1197,8 +1227,8 @@ static void report_sec_mismatch(const char *modname, enum mismatch mismatch,
                 to, sec2annotation(tosec), tosym, to_p,
                 fromsym, sec2annotation(tosec), tosym);
                 break;
-        case DATA_TO_INIT: {
-                const char **s = symbol_white_list;
+        case DATA_TO_ANY_INIT: {
+                const char *const *s = mismatch->symbol_white_list;
                 fprintf(stderr,
                 "The variable %s references\n"
                 "the %s %s%s%s\n"
@@ -1211,15 +1241,15 @@ static void report_sec_mismatch(const char *modname, enum mismatch mismatch,
                 fprintf(stderr, "\n");
                 break;
         }
-        case TEXT_TO_EXIT:
+        case TEXT_TO_ANY_EXIT:
                 fprintf(stderr,
                 "The function %s() references a %s in an exit section.\n"
                 "Often the %s %s%s has valid usage outside the exit section\n"
                 "and the fix is to remove the %sannotation of %s.\n",
                 fromsym, to, to, tosym, to_p, sec2annotation(tosec), tosym);
                 break;
-        case DATA_TO_EXIT: {
-                const char **s = symbol_white_list;
+        case DATA_TO_ANY_EXIT: {
+                const char *const *s = mismatch->symbol_white_list;
                 fprintf(stderr,
                 "The variable %s references\n"
                 "the %s %s%s%s\n"
@@ -1232,8 +1262,8 @@ static void report_sec_mismatch(const char *modname, enum mismatch mismatch,
                 fprintf(stderr, "\n");
                 break;
         }
-        case XXXINIT_TO_INIT:
-        case XXXEXIT_TO_EXIT:
+        case XXXINIT_TO_SOME_INIT:
+        case XXXEXIT_TO_SOME_EXIT:
                 fprintf(stderr,
                 "The %s %s%s%s references\n"
                 "a %s %s%s%s.\n"
@@ -1243,7 +1273,7 @@ static void report_sec_mismatch(const char *modname, enum mismatch mismatch,
                 to, sec2annotation(tosec), tosym, to_p,
                 tosym, fromsym, tosym);
                 break;
-        case INIT_TO_EXIT:
+        case ANY_INIT_TO_ANY_EXIT:
                 fprintf(stderr,
                 "The %s %s%s%s references\n"
                 "a %s %s%s%s.\n"
@@ -1256,7 +1286,7 @@ static void report_sec_mismatch(const char *modname, enum mismatch mismatch,
                 to, sec2annotation(tosec), tosym, to_p,
                 sec2annotation(tosec), tosym, to_p);
                 break;
-        case EXIT_TO_INIT:
+        case ANY_EXIT_TO_ANY_INIT:
                 fprintf(stderr,
                 "The %s %s%s%s references\n"
                 "a %s %s%s%s.\n"
@@ -1275,8 +1305,6 @@ static void report_sec_mismatch(const char *modname, enum mismatch mismatch,
                 "Fix this by removing the %sannotation of %s "
                 "or drop the export.\n",
                 tosym, sec2annotation(tosec), sec2annotation(tosec), tosym);
-        case NO_MISMATCH:
-                /* To get warnings on missing members */
                 break;
         }
         fprintf(stderr, "\n");
@@ -1286,11 +1314,11 @@ static void check_section_mismatch(const char *modname, struct elf_info *elf,
                                    Elf_Rela *r, Elf_Sym *sym, const char *fromsec)
 {
         const char *tosec;
-        enum mismatch mismatch;
+        const struct sectioncheck *mismatch;
 
         tosec = sec_name(elf, sym->st_shndx);
         mismatch = section_mismatch(fromsec, tosec);
-        if (mismatch != NO_MISMATCH) {
+        if (mismatch) {
                 Elf_Sym *to;
                 Elf_Sym *from;
                 const char *tosym;
@@ -1302,7 +1330,8 @@ static void check_section_mismatch(const char *modname, struct elf_info *elf,
                 tosym = sym_name(elf, to);
 
                 /* check whitelist - we may ignore it */
-                if (secref_whitelist(fromsec, fromsym, tosec, tosym)) {
+                if (secref_whitelist(mismatch,
+                                        fromsec, fromsym, tosec, tosym)) {
                         report_sec_mismatch(modname, mismatch,
                            fromsec, r->r_offset, fromsym,
                            is_function(from), tosec, tosym,
@@ -1318,7 +1347,7 @@ static unsigned int *reloc_location(struct elf_info *elf,
         int section = sechdr->sh_info;
 
         return (void *)elf->hdr + sechdrs[section].sh_offset +
-                (r->r_offset - sechdrs[section].sh_addr);
+                r->r_offset - sechdrs[section].sh_addr;
 }
 
 static int addend_386_rel(struct elf_info *elf, Elf_Shdr *sechdr, Elf_Rela *r)