+/* All init and exit sections (code + data) */
+static const char *init_exit_sections[] =
+ {ALL_INIT_SECTIONS, ALL_EXIT_SECTIONS, NULL };
+
+/* data section */
+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
+};
+
+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,
+ EXPORT_TO_INIT_EXIT,
+};
+
+struct sectioncheck {
+ const char *fromsec[20];
+ const char *tosec[20];
+ enum mismatch mismatch;
+};
+
+const struct sectioncheck sectioncheck[] = {
+/* Do not reference init/exit code/data from
+ * normal code and data
+ */
+{
+ .fromsec = { TEXT_SECTIONS, NULL },
+ .tosec = { ALL_INIT_SECTIONS, NULL },
+ .mismatch = TEXT_TO_INIT,
+},
+{
+ .fromsec = { DATA_SECTIONS, NULL },
+ .tosec = { ALL_INIT_SECTIONS, NULL },
+ .mismatch = DATA_TO_INIT,
+},
+{
+ .fromsec = { TEXT_SECTIONS, NULL },
+ .tosec = { ALL_EXIT_SECTIONS, NULL },
+ .mismatch = TEXT_TO_EXIT,
+},
+{
+ .fromsec = { DATA_SECTIONS, NULL },
+ .tosec = { ALL_EXIT_SECTIONS, NULL },
+ .mismatch = DATA_TO_EXIT,
+},
+/* Do not reference init code/data from devinit/cpuinit/meminit code/data */
+{
+ .fromsec = { DEV_INIT_SECTIONS, CPU_INIT_SECTIONS, MEM_INIT_SECTIONS, NULL },
+ .tosec = { INIT_SECTIONS, NULL },
+ .mismatch = XXXINIT_TO_INIT,
+},
+/* Do not reference cpuinit code/data from meminit code/data */
+{
+ .fromsec = { MEM_INIT_SECTIONS, NULL },
+ .tosec = { CPU_INIT_SECTIONS, NULL },
+ .mismatch = XXXINIT_TO_INIT,
+},
+/* Do not reference meminit code/data from cpuinit code/data */
+{
+ .fromsec = { CPU_INIT_SECTIONS, NULL },
+ .tosec = { MEM_INIT_SECTIONS, NULL },
+ .mismatch = XXXINIT_TO_INIT,
+},
+/* Do not reference exit code/data from devexit/cpuexit/memexit code/data */
+{
+ .fromsec = { DEV_EXIT_SECTIONS, CPU_EXIT_SECTIONS, MEM_EXIT_SECTIONS, NULL },
+ .tosec = { EXIT_SECTIONS, NULL },
+ .mismatch = XXXEXIT_TO_EXIT,
+},
+/* Do not reference cpuexit code/data from memexit code/data */
+{
+ .fromsec = { MEM_EXIT_SECTIONS, NULL },
+ .tosec = { CPU_EXIT_SECTIONS, NULL },
+ .mismatch = XXXEXIT_TO_EXIT,
+},
+/* Do not reference memexit code/data from cpuexit code/data */
+{
+ .fromsec = { CPU_EXIT_SECTIONS, NULL },
+ .tosec = { MEM_EXIT_SECTIONS, NULL },
+ .mismatch = XXXEXIT_TO_EXIT,
+},
+/* Do not use exit code/data from init code */
+{
+ .fromsec = { ALL_INIT_SECTIONS, NULL },
+ .tosec = { ALL_EXIT_SECTIONS, NULL },
+ .mismatch = INIT_TO_EXIT,
+},
+/* Do not use init code/data from exit code */
+{
+ .fromsec = { ALL_EXIT_SECTIONS, NULL },
+ .tosec = { ALL_INIT_SECTIONS, NULL },
+ .mismatch = EXIT_TO_INIT,
+},
+/* Do not export init/exit functions or data */
+{
+ .fromsec = { "__ksymtab*", NULL },
+ .tosec = { INIT_SECTIONS, EXIT_SECTIONS, NULL },
+ .mismatch = EXPORT_TO_INIT_EXIT
+}
+};
+
+static int section_mismatch(const char *fromsec, const char *tosec)
+{
+ int i;
+ int elems = sizeof(sectioncheck) / sizeof(struct sectioncheck);
+ const struct sectioncheck *check = §ioncheck[0];
+
+ for (i = 0; i < elems; i++) {
+ if (match(fromsec, check->fromsec) &&
+ match(tosec, check->tosec))
+ return check->mismatch;
+ check++;
+ }
+ return NO_MISMATCH;