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-rw-r--r--scripts/mod/file2alias.c106
1 files changed, 61 insertions, 45 deletions
diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c
index 395e7479bcf7..e8c969577768 100644
--- a/scripts/mod/file2alias.c
+++ b/scripts/mod/file2alias.c
@@ -39,6 +39,35 @@ typedef unsigned char __u8;
* we handle those differences explicitly below */
#include "../../include/linux/mod_devicetable.h"
+/* This array collects all instances that use the generic do_table */
+struct devtable {
+ const char *device_id; /* name of table, __mod_<name>_device_table. */
+ unsigned long id_size;
+ void *function;
+};
+
+/* We construct a table of pointers in an ELF section (pointers generally
+ * go unpadded by gcc). ld creates boundary syms for us. */
+extern struct devtable *__start___devtable[], *__stop___devtable[];
+#define ___cat(a,b) a ## b
+#define __cat(a,b) ___cat(a,b)
+
+#if __GNUC__ == 3 && __GNUC_MINOR__ < 3
+# define __used __attribute__((__unused__))
+#else
+# define __used __attribute__((__used__))
+#endif
+
+/* Add a table entry. We test function type matches while we're here. */
+#define ADD_TO_DEVTABLE(device_id, type, function) \
+ static struct devtable __cat(devtable,__LINE__) = { \
+ device_id + 0*sizeof((function)((const char *)NULL, \
+ (type *)NULL, \
+ (char *)NULL)), \
+ sizeof(type), (function) }; \
+ static struct devtable *__attribute__((section("__devtable"))) \
+ __used __cat(devtable_ptr,__LINE__) = &__cat(devtable,__LINE__)
+
#define ADD(str, sep, cond, field) \
do { \
strcat(str, sep); \
@@ -290,6 +319,7 @@ static int do_hid_entry(const char *filename,
return 1;
}
+ADD_TO_DEVTABLE("hid", struct hid_device_id, do_hid_entry);
/* Looks like: ieee1394:venNmoNspNverN */
static int do_ieee1394_entry(const char *filename,
@@ -314,6 +344,7 @@ static int do_ieee1394_entry(const char *filename,
add_wildcard(alias);
return 1;
}
+ADD_TO_DEVTABLE("ieee1394", struct ieee1394_device_id, do_ieee1394_entry);
/* Looks like: pci:vNdNsvNsdNbcNscNiN. */
static int do_pci_entry(const char *filename,
@@ -357,6 +388,7 @@ static int do_pci_entry(const char *filename,
add_wildcard(alias);
return 1;
}
+ADD_TO_DEVTABLE("pci", struct pci_device_id, do_pci_entry);
/* looks like: "ccw:tNmNdtNdmN" */
static int do_ccw_entry(const char *filename,
@@ -380,6 +412,7 @@ static int do_ccw_entry(const char *filename,
add_wildcard(alias);
return 1;
}
+ADD_TO_DEVTABLE("ccw", struct ccw_device_id, do_ccw_entry);
/* looks like: "ap:tN" */
static int do_ap_entry(const char *filename,
@@ -388,6 +421,7 @@ static int do_ap_entry(const char *filename,
sprintf(alias, "ap:t%02X*", id->dev_type);
return 1;
}
+ADD_TO_DEVTABLE("ap", struct ap_device_id, do_ap_entry);
/* looks like: "css:tN" */
static int do_css_entry(const char *filename,
@@ -396,6 +430,7 @@ static int do_css_entry(const char *filename,
sprintf(alias, "css:t%01X", id->type);
return 1;
}
+ADD_TO_DEVTABLE("css", struct css_device_id, do_css_entry);
/* Looks like: "serio:tyNprNidNexN" */
static int do_serio_entry(const char *filename,
@@ -415,6 +450,7 @@ static int do_serio_entry(const char *filename,
add_wildcard(alias);
return 1;
}
+ADD_TO_DEVTABLE("serio", struct serio_device_id, do_serio_entry);
/* looks like: "acpi:ACPI0003 or acpi:PNP0C0B" or "acpi:LNXVIDEO" */
static int do_acpi_entry(const char *filename,
@@ -423,6 +459,7 @@ static int do_acpi_entry(const char *filename,
sprintf(alias, "acpi*:%s:*", id->id);
return 1;
}
+ADD_TO_DEVTABLE("acpi", struct acpi_device_id, do_acpi_entry);
/* looks like: "pnp:dD" */
static void do_pnp_device_entry(void *symval, unsigned long size,
@@ -545,8 +582,7 @@ static int do_pcmcia_entry(const char *filename,
add_wildcard(alias);
return 1;
}
-
-
+ADD_TO_DEVTABLE("pcmcia", struct pcmcia_device_id, do_pcmcia_entry);
static int do_of_entry (const char *filename, struct of_device_id *of, char *alias)
{
@@ -569,6 +605,7 @@ static int do_of_entry (const char *filename, struct of_device_id *of, char *ali
add_wildcard(alias);
return 1;
}
+ADD_TO_DEVTABLE("of", struct of_device_id, do_of_entry);
static int do_vio_entry(const char *filename, struct vio_device_id *vio,
char *alias)
@@ -586,6 +623,7 @@ static int do_vio_entry(const char *filename, struct vio_device_id *vio,
add_wildcard(alias);
return 1;
}
+ADD_TO_DEVTABLE("vio", struct vio_device_id, do_vio_entry);
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
@@ -641,6 +679,7 @@ static int do_input_entry(const char *filename, struct input_device_id *id,
do_input(alias, id->swbit, 0, INPUT_DEVICE_ID_SW_MAX);
return 1;
}
+ADD_TO_DEVTABLE("input", struct input_device_id, do_input_entry);
static int do_eisa_entry(const char *filename, struct eisa_device_id *eisa,
char *alias)
@@ -651,6 +690,7 @@ static int do_eisa_entry(const char *filename, struct eisa_device_id *eisa,
strcat(alias, "*");
return 1;
}
+ADD_TO_DEVTABLE("eisa", struct eisa_device_id, do_eisa_entry);
/* Looks like: parisc:tNhvNrevNsvN */
static int do_parisc_entry(const char *filename, struct parisc_device_id *id,
@@ -670,6 +710,7 @@ static int do_parisc_entry(const char *filename, struct parisc_device_id *id,
add_wildcard(alias);
return 1;
}
+ADD_TO_DEVTABLE("parisc", struct parisc_device_id, do_parisc_entry);
/* Looks like: sdio:cNvNdN. */
static int do_sdio_entry(const char *filename,
@@ -686,6 +727,7 @@ static int do_sdio_entry(const char *filename,
add_wildcard(alias);
return 1;
}
+ADD_TO_DEVTABLE("sdio", struct sdio_device_id, do_sdio_entry);
/* Looks like: ssb:vNidNrevN. */
static int do_ssb_entry(const char *filename,
@@ -702,6 +744,7 @@ static int do_ssb_entry(const char *filename,
add_wildcard(alias);
return 1;
}
+ADD_TO_DEVTABLE("ssb", struct ssb_device_id, do_ssb_entry);
/* Looks like: bcma:mNidNrevNclN. */
static int do_bcma_entry(const char *filename,
@@ -720,6 +763,7 @@ static int do_bcma_entry(const char *filename,
add_wildcard(alias);
return 1;
}
+ADD_TO_DEVTABLE("bcma", struct bcma_device_id, do_bcma_entry);
/* Looks like: virtio:dNvN */
static int do_virtio_entry(const char *filename, struct virtio_device_id *id,
@@ -735,6 +779,7 @@ static int do_virtio_entry(const char *filename, struct virtio_device_id *id,
add_wildcard(alias);
return 1;
}
+ADD_TO_DEVTABLE("virtio", struct virtio_device_id, do_virtio_entry);
/*
* Looks like: vmbus:guid
@@ -756,6 +801,7 @@ static int do_vmbus_entry(const char *filename, struct hv_vmbus_device_id *id,
return 1;
}
+ADD_TO_DEVTABLE("vmbus", struct hv_vmbus_device_id, do_vmbus_entry);
/* Looks like: i2c:S */
static int do_i2c_entry(const char *filename, struct i2c_device_id *id,
@@ -765,6 +811,7 @@ static int do_i2c_entry(const char *filename, struct i2c_device_id *id,
return 1;
}
+ADD_TO_DEVTABLE("i2c", struct i2c_device_id, do_i2c_entry);
/* Looks like: spi:S */
static int do_spi_entry(const char *filename, struct spi_device_id *id,
@@ -774,6 +821,7 @@ static int do_spi_entry(const char *filename, struct spi_device_id *id,
return 1;
}
+ADD_TO_DEVTABLE("spi", struct spi_device_id, do_spi_entry);
static const struct dmifield {
const char *prefix;
@@ -828,6 +876,7 @@ static int do_dmi_entry(const char *filename, struct dmi_system_id *id,
strcat(alias, ":");
return 1;
}
+ADD_TO_DEVTABLE("dmi", struct dmi_system_id, do_dmi_entry);
static int do_platform_entry(const char *filename,
struct platform_device_id *id, char *alias)
@@ -835,6 +884,7 @@ static int do_platform_entry(const char *filename,
sprintf(alias, PLATFORM_MODULE_PREFIX "%s", id->name);
return 1;
}
+ADD_TO_DEVTABLE("platform", struct platform_device_id, do_platform_entry);
static int do_mdio_entry(const char *filename,
struct mdio_device_id *id, char *alias)
@@ -857,6 +907,7 @@ static int do_mdio_entry(const char *filename,
return 1;
}
+ADD_TO_DEVTABLE("mdio", struct mdio_device_id, do_mdio_entry);
/* Looks like: zorro:iN. */
static int do_zorro_entry(const char *filename, struct zorro_device_id *id,
@@ -867,6 +918,7 @@ static int do_zorro_entry(const char *filename, struct zorro_device_id *id,
ADD(alias, "i", id->id != ZORRO_WILDCARD, id->id);
return 1;
}
+ADD_TO_DEVTABLE("zorro", struct zorro_device_id, do_zorro_entry);
/* looks like: "pnp:dD" */
static int do_isapnp_entry(const char *filename,
@@ -880,6 +932,7 @@ static int do_isapnp_entry(const char *filename,
(id->function >> 12) & 0x0f, (id->function >> 8) & 0x0f);
return 1;
}
+ADD_TO_DEVTABLE("isa", struct isapnp_device_id, do_isapnp_entry);
/*
* Append a match expression for a single masked hex digit.
@@ -948,6 +1001,7 @@ static int do_amba_entry(const char *filename,
return 1;
}
+ADD_TO_DEVTABLE("amba", struct amba_id, do_amba_entry);
/* Does namelen bytes of name exactly match the symbol? */
static bool sym_is(const char *name, unsigned namelen, const char *symbol)
@@ -980,43 +1034,6 @@ static void do_table(void *symval, unsigned long size,
}
}
-/* This array collects all instances that use the generic do_table above */
-struct devtable_switch {
- const char *device_id; /* name of table, __mod_<name>_device_table. */
- unsigned long id_size;
- void *function;
-};
-
-static const struct devtable_switch devtable_switch[] = {
- { "acpi", sizeof(struct acpi_device_id), do_acpi_entry },
- { "amba", sizeof(struct amba_id), do_amba_entry },
- { "ap", sizeof(struct ap_device_id), do_ap_entry },
- { "bcma", sizeof(struct bcma_device_id), do_bcma_entry },
- { "ccw", sizeof(struct ccw_device_id), do_ccw_entry },
- { "css", sizeof(struct css_device_id), do_css_entry },
- { "dmi", sizeof(struct dmi_system_id), do_dmi_entry },
- { "eisa", sizeof(struct eisa_device_id), do_eisa_entry },
- { "hid", sizeof(struct hid_device_id), do_hid_entry },
- { "i2c", sizeof(struct i2c_device_id), do_i2c_entry },
- { "ieee1394", sizeof(struct ieee1394_device_id), do_ieee1394_entry },
- { "input", sizeof(struct input_device_id), do_input_entry },
- { "isa", sizeof(struct isapnp_device_id), do_isapnp_entry },
- { "mdio", sizeof(struct mdio_device_id), do_mdio_entry },
- { "of", sizeof(struct of_device_id), do_of_entry },
- { "parisc", sizeof(struct parisc_device_id), do_parisc_entry },
- { "pci", sizeof(struct pci_device_id), do_pci_entry },
- { "pcmcia", sizeof(struct pcmcia_device_id), do_pcmcia_entry },
- { "platform", sizeof(struct platform_device_id), do_platform_entry },
- { "sdio", sizeof(struct sdio_device_id), do_sdio_entry },
- { "serio", sizeof(struct serio_device_id), do_serio_entry },
- { "spi", sizeof(struct spi_device_id), do_spi_entry },
- { "ssb", sizeof(struct ssb_device_id), do_ssb_entry },
- { "vio", sizeof(struct vio_device_id), do_vio_entry },
- { "virtio", sizeof(struct virtio_device_id), do_virtio_entry },
- { "vmbus", sizeof(struct hv_vmbus_device_id), do_vmbus_entry },
- { "zorro", sizeof(struct zorro_device_id), do_zorro_entry },
-};
-
/* Create MODULE_ALIAS() statements.
* At this time, we cannot write the actual output C source yet,
* so we write into the mod->dev_table_buf buffer. */
@@ -1062,13 +1079,12 @@ void handle_moddevtable(struct module *mod, struct elf_info *info,
else if (sym_is(name, namelen, "pnp_card"))
do_pnp_card_entries(symval, sym->st_size, mod);
else {
- const struct devtable_switch *p = devtable_switch;
- unsigned int i;
+ struct devtable **p;
- for (i = 0; i < ARRAY_SIZE(devtable_switch); i++, p++) {
- if (sym_is(name, namelen, p->device_id)) {
- do_table(symval, sym->st_size, p->id_size,
- p->device_id, p->function, mod);
+ for (p = __start___devtable; p < __stop___devtable; p++) {
+ if (sym_is(name, namelen, (*p)->device_id)) {
+ do_table(symval, sym->st_size, (*p)->id_size,
+ (*p)->device_id, (*p)->function, mod);
break;
}
}