From d945b697d0eea5a811ec299c5f1a25889bb0242b Mon Sep 17 00:00:00 2001 From: David Woodhouse Date: Tue, 16 Sep 2008 16:23:28 -0700 Subject: Automatic MODULE_ALIAS() for DMI match tables. This makes modpost handle MODULE_DEVICE_TABLE(dmi, xxxx). I had to change the string pointers in the match table to char arrays, and picked a size of 79 bytes almost at random -- do we need to make it bigger than that? I was a bit concerned about the 'bloat' this introduces into the match tables, but they should all be __initdata so it shouldn't matter too much. (Actually, modpost does go through the relocations and look at most of them; it wouldn't be impossible to make it handle string pointers -- but doesn't seem to be worth the effort, since they're __initdata). Signed-off-by: David Woodhouse --- scripts/mod/file2alias.c | 57 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 57 insertions(+) (limited to 'scripts/mod') diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c index 4c9890ec252..473f94e56ea 100644 --- a/scripts/mod/file2alias.c +++ b/scripts/mod/file2alias.c @@ -629,6 +629,59 @@ static int do_i2c_entry(const char *filename, struct i2c_device_id *id, return 1; } +static const struct dmifield { + const char *prefix; + int field; +} dmi_fields[] = { + { "bvn", DMI_BIOS_VENDOR }, + { "bvr", DMI_BIOS_VERSION }, + { "bd", DMI_BIOS_DATE }, + { "svn", DMI_SYS_VENDOR }, + { "pn", DMI_PRODUCT_NAME }, + { "pvr", DMI_PRODUCT_VERSION }, + { "rvn", DMI_BOARD_VENDOR }, + { "rn", DMI_BOARD_NAME }, + { "rvr", DMI_BOARD_VERSION }, + { "cvn", DMI_CHASSIS_VENDOR }, + { "ct", DMI_CHASSIS_TYPE }, + { "cvr", DMI_CHASSIS_VERSION }, + { NULL, DMI_NONE } +}; + +static void dmi_ascii_filter(char *d, const char *s) +{ + /* Filter out characters we don't want to see in the modalias string */ + for (; *s; s++) + if (*s > ' ' && *s < 127 && *s != ':') + *(d++) = *s; + + *d = 0; +} + + +static int do_dmi_entry(const char *filename, struct dmi_system_id *id, + char *alias) +{ + int i, j; + + sprintf(alias, "dmi*"); + + for (i = 0; i < ARRAY_SIZE(dmi_fields); i++) { + for (j = 0; j < 4; j++) { + if (id->matches[j].slot && + id->matches[j].slot == dmi_fields[i].field) { + sprintf(alias + strlen(alias), ":%s*", + dmi_fields[i].prefix); + dmi_ascii_filter(alias + strlen(alias), + id->matches[j].substr); + strcat(alias, "*"); + } + } + } + + strcat(alias, ":"); + return 1; +} /* Ignore any prefix, eg. some architectures prepend _ */ static inline int sym_is(const char *symbol, const char *name) { @@ -760,6 +813,10 @@ void handle_moddevtable(struct module *mod, struct elf_info *info, do_table(symval, sym->st_size, sizeof(struct i2c_device_id), "i2c", do_i2c_entry, mod); + else if (sym_is(symname, "__mod_dmi_device_table")) + do_table(symval, sym->st_size, + sizeof(struct dmi_system_id), "dmi", + do_dmi_entry, mod); free(zeros); } -- cgit v1.2.3