mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2026-08-09 06:14:34 +02:00
Uwe Kleine-König (The Capable Hub)
ad428f5811
<linux/mod_devicetable.h> is included transitively in nearly every driver in an x86_64 allmodconfig build of v7.1: $ find drivers -name \*.o -not -name \*.mod.o | wc -l 21330 $ find drivers -name \*.o.cmd -not -name \*.mod.o.cmd | xargs grep -l mod_devicetable.h | wc -l 17038 The result is that even when touching an obscure device id struct most of the kernel needs to be recompiled. Given that each driver typically only needs one or two of these structures, splitting into per subsystem headers and only including what is really needed reduces the amount of needed recompilation. Implement the first step and define each device id struct in a separate header (together with its associated #defines). <linux/mod_devicetable.h> is modified to include all the new headers to continue to provide the same symbols. Several headers currently include <linux/mod_devicetable.h>, those that are most lukrative to include only their subsystem headers only are: $ git -C source grep -l mod_devicetable.h include/linux | while read h; do echo -n "$h:"; find drivers -name \*.o.cmd -not -name \*.mod.o.cmd | xargs grep -l $h | wc -l; done | sort -t: -k2 -n -r | head include/linux/of.h:10897 include/linux/pci.h:7920 include/linux/acpi.h:7097 include/linux/i2c.h:5402 include/linux/spi/spi.h:1897 include/linux/dmi.h:1643 include/linux/usb.h:1222 include/linux/input.h:1205 include/linux/mdio.h:835 include/linux/phy.h:733 struct cpu_feature isn't really a device_id struct. That is kept in <linux/mod_devicetable.h> for now. Acked-by: Danilo Krummrich <dakr@kernel.org> Acked-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> # zorro Link: https://patch.msgid.link/41400e323be8640702b906d04327e833c5bdaf4a.1782808461.git.u.kleine-koenig@baylibre.com [Drop "MOD" from the header guards] Signed-off-by: Uwe Kleine-König (The Capable Hub) <u.kleine-koenig@baylibre.com>
49 lines
1.1 KiB
C
49 lines
1.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef LINUX_DEVICE_ID_PCMCIA_H
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#define LINUX_DEVICE_ID_PCMCIA_H
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#ifdef __KERNEL__
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#include <linux/types.h>
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typedef unsigned long kernel_ulong_t;
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#endif
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/* PCMCIA */
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#define PCMCIA_DEV_ID_MATCH_MANF_ID 0x0001
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#define PCMCIA_DEV_ID_MATCH_CARD_ID 0x0002
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#define PCMCIA_DEV_ID_MATCH_FUNC_ID 0x0004
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#define PCMCIA_DEV_ID_MATCH_FUNCTION 0x0008
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#define PCMCIA_DEV_ID_MATCH_PROD_ID1 0x0010
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#define PCMCIA_DEV_ID_MATCH_PROD_ID2 0x0020
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#define PCMCIA_DEV_ID_MATCH_PROD_ID3 0x0040
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#define PCMCIA_DEV_ID_MATCH_PROD_ID4 0x0080
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#define PCMCIA_DEV_ID_MATCH_DEVICE_NO 0x0100
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#define PCMCIA_DEV_ID_MATCH_FAKE_CIS 0x0200
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#define PCMCIA_DEV_ID_MATCH_ANONYMOUS 0x0400
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struct pcmcia_device_id {
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__u16 match_flags;
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__u16 manf_id;
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__u16 card_id;
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__u8 func_id;
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/* for real multi-function devices */
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__u8 function;
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/* for pseudo multi-function devices */
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__u8 device_no;
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__u32 prod_id_hash[4];
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/* not matched against in kernelspace */
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const char * prod_id[4];
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/* not matched against */
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kernel_ulong_t driver_info;
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char * cisfile;
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};
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#endif /* ifndef LINUX_DEVICE_ID_PCMCIA_H */
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