modpost: file2alias: go back to simple devtable lookup
Commite49ce14150("modpost: use linker section to generate table.") was not so cool as we had expected first; it ended up with ugly section hacks when commitdd2a3acaec("mod/file2alias: make modpost compile on darwin again") came in. Given a certain degree of unknowledge about the link stage of host programs, I really want to see simple, stupid table lookup so that this works in the same way regardless of the underlying executable format. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Mathieu Malaterre <malat@debian.org>
This commit is contained in:
Masahiro Yamada
parent
e07db28eea
commit
ec91e78d37
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@ -50,46 +50,6 @@ struct devtable {
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void *function;
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};
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#define ___cat(a,b) a ## b
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#define __cat(a,b) ___cat(a,b)
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/* we need some special handling for this host tool running eventually on
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* Darwin. The Mach-O section handling is a bit different than ELF section
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* handling. The differnces in detail are:
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* a) we have segments which have sections
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* b) we need a API call to get the respective section symbols */
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#if defined(__MACH__)
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#include <mach-o/getsect.h>
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#define INIT_SECTION(name) do { \
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unsigned long name ## _len; \
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char *__cat(pstart_,name) = getsectdata("__TEXT", \
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#name, &__cat(name,_len)); \
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char *__cat(pstop_,name) = __cat(pstart_,name) + \
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__cat(name, _len); \
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__cat(__start_,name) = (void *)__cat(pstart_,name); \
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__cat(__stop_,name) = (void *)__cat(pstop_,name); \
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} while (0)
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#define SECTION(name) __attribute__((section("__TEXT, " #name)))
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struct devtable **__start___devtable, **__stop___devtable;
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#else
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#define INIT_SECTION(name) /* no-op for ELF */
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#define SECTION(name) __attribute__((section(#name)))
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/* We construct a table of pointers in an ELF section (pointers generally
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* go unpadded by gcc). ld creates boundary syms for us. */
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extern struct devtable *__start___devtable[], *__stop___devtable[];
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#endif /* __MACH__ */
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#if !defined(__used)
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# if __GNUC__ == 3 && __GNUC_MINOR__ < 3
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# define __used __attribute__((__unused__))
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# else
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# define __used __attribute__((__used__))
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# endif
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#endif
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/* Define a variable f that holds the value of field f of struct devid
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* based at address m.
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*/
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@ -110,16 +70,6 @@ extern struct devtable *__start___devtable[], *__stop___devtable[];
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#define DEF_FIELD_ADDR(m, devid, f) \
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DEF_FIELD_ADDR_VAR(m, devid, f, f)
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/* Add a table entry. We test function type matches while we're here. */
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#define ADD_TO_DEVTABLE(device_id, type, function) \
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static struct devtable __cat(devtable,__LINE__) = { \
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device_id + 0*sizeof((function)((const char *)NULL, \
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(void *)NULL, \
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(char *)NULL)), \
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SIZE_##type, (function) }; \
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static struct devtable *SECTION(__devtable) __used \
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__cat(devtable_ptr,__LINE__) = &__cat(devtable,__LINE__)
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#define ADD(str, sep, cond, field) \
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do { \
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strcat(str, sep); \
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@ -439,7 +389,6 @@ static int do_hid_entry(const char *filename,
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return 1;
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}
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ADD_TO_DEVTABLE("hid", hid_device_id, do_hid_entry);
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/* Looks like: ieee1394:venNmoNspNverN */
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static int do_ieee1394_entry(const char *filename,
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@ -464,7 +413,6 @@ static int do_ieee1394_entry(const char *filename,
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add_wildcard(alias);
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return 1;
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}
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ADD_TO_DEVTABLE("ieee1394", ieee1394_device_id, do_ieee1394_entry);
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/* Looks like: pci:vNdNsvNsdNbcNscNiN. */
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static int do_pci_entry(const char *filename,
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@ -508,7 +456,6 @@ static int do_pci_entry(const char *filename,
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add_wildcard(alias);
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return 1;
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}
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ADD_TO_DEVTABLE("pci", pci_device_id, do_pci_entry);
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/* looks like: "ccw:tNmNdtNdmN" */
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static int do_ccw_entry(const char *filename,
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@ -532,7 +479,6 @@ static int do_ccw_entry(const char *filename,
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add_wildcard(alias);
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return 1;
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}
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ADD_TO_DEVTABLE("ccw", ccw_device_id, do_ccw_entry);
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/* looks like: "ap:tN" */
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static int do_ap_entry(const char *filename,
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@ -543,7 +489,6 @@ static int do_ap_entry(const char *filename,
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sprintf(alias, "ap:t%02X*", dev_type);
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return 1;
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}
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ADD_TO_DEVTABLE("ap", ap_device_id, do_ap_entry);
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/* looks like: "css:tN" */
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static int do_css_entry(const char *filename,
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@ -554,7 +499,6 @@ static int do_css_entry(const char *filename,
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sprintf(alias, "css:t%01X", type);
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return 1;
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}
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ADD_TO_DEVTABLE("css", css_device_id, do_css_entry);
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/* Looks like: "serio:tyNprNidNexN" */
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static int do_serio_entry(const char *filename,
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@ -574,7 +518,6 @@ static int do_serio_entry(const char *filename,
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add_wildcard(alias);
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return 1;
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}
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ADD_TO_DEVTABLE("serio", serio_device_id, do_serio_entry);
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/* looks like: "acpi:ACPI0003" or "acpi:PNP0C0B" or "acpi:LNXVIDEO" or
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* "acpi:bbsspp" (bb=base-class, ss=sub-class, pp=prog-if)
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@ -612,7 +555,6 @@ static int do_acpi_entry(const char *filename,
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}
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return 1;
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}
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ADD_TO_DEVTABLE("acpi", acpi_device_id, do_acpi_entry);
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/* looks like: "pnp:dD" */
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static void do_pnp_device_entry(void *symval, unsigned long size,
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@ -736,7 +678,6 @@ static int do_pcmcia_entry(const char *filename,
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add_wildcard(alias);
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return 1;
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}
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ADD_TO_DEVTABLE("pcmcia", pcmcia_device_id, do_pcmcia_entry);
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static int do_vio_entry(const char *filename, void *symval,
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char *alias)
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@ -756,7 +697,6 @@ static int do_vio_entry(const char *filename, void *symval,
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add_wildcard(alias);
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return 1;
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}
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ADD_TO_DEVTABLE("vio", vio_device_id, do_vio_entry);
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#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
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@ -829,7 +769,6 @@ static int do_input_entry(const char *filename, void *symval,
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do_input(alias, *swbit, 0, INPUT_DEVICE_ID_SW_MAX);
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return 1;
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}
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ADD_TO_DEVTABLE("input", input_device_id, do_input_entry);
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static int do_eisa_entry(const char *filename, void *symval,
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char *alias)
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@ -841,7 +780,6 @@ static int do_eisa_entry(const char *filename, void *symval,
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strcat(alias, "*");
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return 1;
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}
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ADD_TO_DEVTABLE("eisa", eisa_device_id, do_eisa_entry);
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/* Looks like: parisc:tNhvNrevNsvN */
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static int do_parisc_entry(const char *filename, void *symval,
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@ -861,7 +799,6 @@ static int do_parisc_entry(const char *filename, void *symval,
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add_wildcard(alias);
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return 1;
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}
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ADD_TO_DEVTABLE("parisc", parisc_device_id, do_parisc_entry);
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/* Looks like: sdio:cNvNdN. */
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static int do_sdio_entry(const char *filename,
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@ -878,7 +815,6 @@ static int do_sdio_entry(const char *filename,
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add_wildcard(alias);
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return 1;
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}
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ADD_TO_DEVTABLE("sdio", sdio_device_id, do_sdio_entry);
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/* Looks like: ssb:vNidNrevN. */
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static int do_ssb_entry(const char *filename,
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@ -895,7 +831,6 @@ static int do_ssb_entry(const char *filename,
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add_wildcard(alias);
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return 1;
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}
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ADD_TO_DEVTABLE("ssb", ssb_device_id, do_ssb_entry);
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/* Looks like: bcma:mNidNrevNclN. */
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static int do_bcma_entry(const char *filename,
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@ -914,7 +849,6 @@ static int do_bcma_entry(const char *filename,
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add_wildcard(alias);
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return 1;
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}
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ADD_TO_DEVTABLE("bcma", bcma_device_id, do_bcma_entry);
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/* Looks like: virtio:dNvN */
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static int do_virtio_entry(const char *filename, void *symval,
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@ -930,7 +864,6 @@ static int do_virtio_entry(const char *filename, void *symval,
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add_wildcard(alias);
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return 1;
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}
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ADD_TO_DEVTABLE("virtio", virtio_device_id, do_virtio_entry);
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/*
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* Looks like: vmbus:guid
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@ -953,7 +886,6 @@ static int do_vmbus_entry(const char *filename, void *symval,
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return 1;
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}
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ADD_TO_DEVTABLE("vmbus", hv_vmbus_device_id, do_vmbus_entry);
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/* Looks like: rpmsg:S */
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static int do_rpmsg_entry(const char *filename, void *symval,
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@ -964,7 +896,6 @@ static int do_rpmsg_entry(const char *filename, void *symval,
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return 1;
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}
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ADD_TO_DEVTABLE("rpmsg", rpmsg_device_id, do_rpmsg_entry);
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/* Looks like: i2c:S */
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static int do_i2c_entry(const char *filename, void *symval,
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@ -975,7 +906,6 @@ static int do_i2c_entry(const char *filename, void *symval,
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return 1;
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}
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ADD_TO_DEVTABLE("i2c", i2c_device_id, do_i2c_entry);
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/* Looks like: spi:S */
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static int do_spi_entry(const char *filename, void *symval,
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@ -986,7 +916,6 @@ static int do_spi_entry(const char *filename, void *symval,
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return 1;
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}
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ADD_TO_DEVTABLE("spi", spi_device_id, do_spi_entry);
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static const struct dmifield {
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const char *prefix;
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@ -1041,7 +970,6 @@ static int do_dmi_entry(const char *filename, void *symval,
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strcat(alias, ":");
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return 1;
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}
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ADD_TO_DEVTABLE("dmi", dmi_system_id, do_dmi_entry);
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static int do_platform_entry(const char *filename,
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void *symval, char *alias)
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@ -1050,7 +978,6 @@ static int do_platform_entry(const char *filename,
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sprintf(alias, PLATFORM_MODULE_PREFIX "%s", *name);
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return 1;
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}
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ADD_TO_DEVTABLE("platform", platform_device_id, do_platform_entry);
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static int do_mdio_entry(const char *filename,
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void *symval, char *alias)
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@ -1075,7 +1002,6 @@ static int do_mdio_entry(const char *filename,
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return 1;
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}
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ADD_TO_DEVTABLE("mdio", mdio_device_id, do_mdio_entry);
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/* Looks like: zorro:iN. */
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static int do_zorro_entry(const char *filename, void *symval,
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@ -1086,7 +1012,6 @@ static int do_zorro_entry(const char *filename, void *symval,
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ADD(alias, "i", id != ZORRO_WILDCARD, id);
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return 1;
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}
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ADD_TO_DEVTABLE("zorro", zorro_device_id, do_zorro_entry);
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/* looks like: "pnp:dD" */
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static int do_isapnp_entry(const char *filename,
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@ -1102,7 +1027,6 @@ static int do_isapnp_entry(const char *filename,
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(function >> 12) & 0x0f, (function >> 8) & 0x0f);
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return 1;
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}
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ADD_TO_DEVTABLE("isapnp", isapnp_device_id, do_isapnp_entry);
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/* Looks like: "ipack:fNvNdN". */
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static int do_ipack_entry(const char *filename,
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@ -1118,7 +1042,6 @@ static int do_ipack_entry(const char *filename,
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add_wildcard(alias);
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return 1;
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}
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ADD_TO_DEVTABLE("ipack", ipack_device_id, do_ipack_entry);
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/*
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* Append a match expression for a single masked hex digit.
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@ -1189,7 +1112,6 @@ static int do_amba_entry(const char *filename,
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return 1;
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}
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ADD_TO_DEVTABLE("amba", amba_id, do_amba_entry);
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/*
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* looks like: "mipscdmm:tN"
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@ -1205,7 +1127,6 @@ static int do_mips_cdmm_entry(const char *filename,
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sprintf(alias, "mipscdmm:t%02X*", type);
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return 1;
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}
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ADD_TO_DEVTABLE("mipscdmm", mips_cdmm_device_id, do_mips_cdmm_entry);
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/* LOOKS like cpu:type:x86,venVVVVfamFFFFmodMMMM:feature:*,FEAT,*
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* All fields are numbers. It would be nicer to use strings for vendor
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@ -1230,7 +1151,6 @@ static int do_x86cpu_entry(const char *filename, void *symval,
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sprintf(alias + strlen(alias), "%04X*", feature);
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return 1;
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}
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ADD_TO_DEVTABLE("x86cpu", x86_cpu_id, do_x86cpu_entry);
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/* LOOKS like cpu:type:*:feature:*FEAT* */
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static int do_cpu_entry(const char *filename, void *symval, char *alias)
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@ -1240,7 +1160,6 @@ static int do_cpu_entry(const char *filename, void *symval, char *alias)
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sprintf(alias, "cpu:type:*:feature:*%04X*", feature);
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return 1;
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}
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ADD_TO_DEVTABLE("cpu", cpu_feature, do_cpu_entry);
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/* Looks like: mei:S:uuid:N:* */
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static int do_mei_entry(const char *filename, void *symval,
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@ -1259,7 +1178,6 @@ static int do_mei_entry(const char *filename, void *symval,
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return 1;
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}
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ADD_TO_DEVTABLE("mei", mei_cl_device_id, do_mei_entry);
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/* Looks like: rapidio:vNdNavNadN */
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static int do_rio_entry(const char *filename,
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@ -1279,7 +1197,6 @@ static int do_rio_entry(const char *filename,
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add_wildcard(alias);
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return 1;
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}
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ADD_TO_DEVTABLE("rapidio", rio_device_id, do_rio_entry);
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/* Looks like: ulpi:vNpN */
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static int do_ulpi_entry(const char *filename, void *symval,
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@ -1292,7 +1209,6 @@ static int do_ulpi_entry(const char *filename, void *symval,
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return 1;
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}
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ADD_TO_DEVTABLE("ulpi", ulpi_device_id, do_ulpi_entry);
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/* Looks like: hdaudio:vNrNaN */
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static int do_hda_entry(const char *filename, void *symval, char *alias)
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@ -1309,7 +1225,6 @@ static int do_hda_entry(const char *filename, void *symval, char *alias)
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add_wildcard(alias);
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return 1;
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}
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ADD_TO_DEVTABLE("hdaudio", hda_device_id, do_hda_entry);
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/* Looks like: sdw:mNpN */
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static int do_sdw_entry(const char *filename, void *symval, char *alias)
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@ -1324,7 +1239,6 @@ static int do_sdw_entry(const char *filename, void *symval, char *alias)
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add_wildcard(alias);
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return 1;
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}
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ADD_TO_DEVTABLE("sdw", sdw_device_id, do_sdw_entry);
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/* Looks like: fsl-mc:vNdN */
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static int do_fsl_mc_entry(const char *filename, void *symval,
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@ -1336,7 +1250,6 @@ static int do_fsl_mc_entry(const char *filename, void *symval,
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sprintf(alias, "fsl-mc:v%08Xd%s", vendor, *obj_type);
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return 1;
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}
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ADD_TO_DEVTABLE("fslmc", fsl_mc_device_id, do_fsl_mc_entry);
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/* Looks like: tbsvc:kSpNvNrN */
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static int do_tbsvc_entry(const char *filename, void *symval, char *alias)
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@ -1361,7 +1274,6 @@ static int do_tbsvc_entry(const char *filename, void *symval, char *alias)
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add_wildcard(alias);
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return 1;
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}
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ADD_TO_DEVTABLE("tbsvc", tb_service_id, do_tbsvc_entry);
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/* Looks like: typec:idNmN */
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static int do_typec_entry(const char *filename, void *symval, char *alias)
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@ -1374,7 +1286,6 @@ static int do_typec_entry(const char *filename, void *symval, char *alias)
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return 1;
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}
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ADD_TO_DEVTABLE("typec", typec_device_id, do_typec_entry);
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/* Does namelen bytes of name exactly match the symbol? */
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static bool sym_is(const char *name, unsigned namelen, const char *symbol)
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@ -1407,6 +1318,48 @@ static void do_table(void *symval, unsigned long size,
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}
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}
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static const struct devtable devtable[] = {
|
||||
{"hid", SIZE_hid_device_id, do_hid_entry},
|
||||
{"ieee1394", SIZE_ieee1394_device_id, do_ieee1394_entry},
|
||||
{"pci", SIZE_pci_device_id, do_pci_entry},
|
||||
{"ccw", SIZE_ccw_device_id, do_ccw_entry},
|
||||
{"ap", SIZE_ap_device_id, do_ap_entry},
|
||||
{"css", SIZE_css_device_id, do_css_entry},
|
||||
{"serio", SIZE_serio_device_id, do_serio_entry},
|
||||
{"acpi", SIZE_acpi_device_id, do_acpi_entry},
|
||||
{"pcmcia", SIZE_pcmcia_device_id, do_pcmcia_entry},
|
||||
{"vio", SIZE_vio_device_id, do_vio_entry},
|
||||
{"input", SIZE_input_device_id, do_input_entry},
|
||||
{"eisa", SIZE_eisa_device_id, do_eisa_entry},
|
||||
{"parisc", SIZE_parisc_device_id, do_parisc_entry},
|
||||
{"sdio", SIZE_sdio_device_id, do_sdio_entry},
|
||||
{"ssb", SIZE_ssb_device_id, do_ssb_entry},
|
||||
{"bcma", SIZE_bcma_device_id, do_bcma_entry},
|
||||
{"virtio", SIZE_virtio_device_id, do_virtio_entry},
|
||||
{"vmbus", SIZE_hv_vmbus_device_id, do_vmbus_entry},
|
||||
{"rpmsg", SIZE_rpmsg_device_id, do_rpmsg_entry},
|
||||
{"i2c", SIZE_i2c_device_id, do_i2c_entry},
|
||||
{"spi", SIZE_spi_device_id, do_spi_entry},
|
||||
{"dmi", SIZE_dmi_system_id, do_dmi_entry},
|
||||
{"platform", SIZE_platform_device_id, do_platform_entry},
|
||||
{"mdio", SIZE_mdio_device_id, do_mdio_entry},
|
||||
{"zorro", SIZE_zorro_device_id, do_zorro_entry},
|
||||
{"isapnp", SIZE_isapnp_device_id, do_isapnp_entry},
|
||||
{"ipack", SIZE_ipack_device_id, do_ipack_entry},
|
||||
{"amba", SIZE_amba_id, do_amba_entry},
|
||||
{"mipscdmm", SIZE_mips_cdmm_device_id, do_mips_cdmm_entry},
|
||||
{"x86cpu", SIZE_x86_cpu_id, do_x86cpu_entry},
|
||||
{"cpu", SIZE_cpu_feature, do_cpu_entry},
|
||||
{"mei", SIZE_mei_cl_device_id, do_mei_entry},
|
||||
{"rapidio", SIZE_rio_device_id, do_rio_entry},
|
||||
{"ulpi", SIZE_ulpi_device_id, do_ulpi_entry},
|
||||
{"hdaudio", SIZE_hda_device_id, do_hda_entry},
|
||||
{"sdw", SIZE_sdw_device_id, do_sdw_entry},
|
||||
{"fslmc", SIZE_fsl_mc_device_id, do_fsl_mc_entry},
|
||||
{"tbsvc", SIZE_tb_service_id, do_tbsvc_entry},
|
||||
{"typec", SIZE_typec_device_id, do_typec_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. */
|
||||
|
|
@ -1460,13 +1413,14 @@ 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 {
|
||||
struct devtable **p;
|
||||
INIT_SECTION(__devtable);
|
||||
int i;
|
||||
|
||||
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);
|
||||
for (i = 0; i < ARRAY_SIZE(devtable); i++) {
|
||||
const struct devtable *p = &devtable[i];
|
||||
|
||||
if (sym_is(name, namelen, p->device_id)) {
|
||||
do_table(symval, sym->st_size, p->id_size,
|
||||
p->device_id, p->function, mod);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue