c - 错误 : expected identifier or '(' before numeric constant

Question

编译内核时出错，这让我很头疼。不知道怎么了。多行宏定义已经被换行转义。

实际错误是

include/linux/mmc/sdio_func.h:169:2: error: expected identifier or '(' before ')' token

触发错误的头文件

/*
 *  include/linux/mmc/sdio_func.h
 *
 *  Copyright 2007-2008 Pierre Ossman
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or (at
 * your option) any later version.
 */

#ifndef MMC_SDIO_FUNC_H
#define MMC_SDIO_FUNC_H

#include <linux/device.h>
#include <linux/mod_devicetable.h>

#include <linux/mmc/pm.h>

struct mmc_card;
struct sdio_func;

typedef void (sdio_irq_handler_t)(struct sdio_func *);

/*
 * Structure used to hold embedded SDIO device data from platform layer
 */
struct sdio_embedded_func {
    uint8_t f_class;
    uint32_t f_maxblksize;
};

/*
 * SDIO function CIS tuple (unknown to the core)
 */
struct sdio_func_tuple {
    struct sdio_func_tuple *next;
    unsigned char code;
    unsigned char size;
    unsigned char data[0];
};

/*
 * SDIO function devices
 */
struct sdio_func {
    struct mmc_card     *card;      /* the card this device belongs to */
    struct device       dev;        /* the device */
    sdio_irq_handler_t  *irq_handler;   /* IRQ callback */
    unsigned int        num;        /* function number */

    unsigned char       class;      /* standard interface class */
    unsigned short      vendor;     /* vendor id */
    unsigned short      device;     /* device id */

    unsigned        max_blksize;    /* maximum block size */
    unsigned        cur_blksize;    /* current block size */

    unsigned        enable_timeout; /* max enable timeout in msec */

    unsigned int        state;      /* function state */
#define SDIO_STATE_PRESENT  (1<<0)      /* present in sysfs */

    u8          tmpbuf[4];  /* DMA:able scratch buffer */

    unsigned        num_info;   /* number of info strings */
    const char      **info;     /* info strings */

    struct sdio_func_tuple *tuples;
};

#define sdio_func_present(f)    ((f)->state & SDIO_STATE_PRESENT)

#define sdio_func_set_present(f) ((f)->state |= SDIO_STATE_PRESENT)

#define sdio_func_id(f)     (dev_name(&(f)->dev))

#define sdio_get_drvdata(f) dev_get_drvdata(&(f)->dev)
#define sdio_set_drvdata(f,d)   dev_set_drvdata(&(f)->dev, d)
#define dev_to_sdio_func(d) container_of(d, struct sdio_func, dev)

/*
 * SDIO function device driver
 */
struct sdio_driver {
    char *name;
    const struct sdio_device_id *id_table;

    int (*probe)(struct sdio_func *, const struct sdio_device_id *);
    void (*remove)(struct sdio_func *);

    struct device_driver drv;
};

#define to_sdio_driver(d)   container_of(d, struct sdio_driver, drv)

/**
 * SDIO_DEVICE - macro used to describe a specific SDIO device
 * @vend: the 16 bit manufacturer code
 * @dev: the 16 bit function id
 *
 * This macro is used to create a struct sdio_device_id that matches a
 * specific device. The class field will be set to SDIO_ANY_ID.
 */
#define SDIO_DEVICE(vend,dev) \
    .class = SDIO_ANY_ID, \
    .vendor = (vend), .device = (dev)

/**
 * SDIO_DEVICE_CLASS - macro used to describe a specific SDIO device class
 * @dev_class: the 8 bit standard interface code
 *
 * This macro is used to create a struct sdio_device_id that matches a
 * specific standard SDIO function type.  The vendor and device fields will
 * be set to SDIO_ANY_ID.
 */
#define SDIO_DEVICE_CLASS(dev_class) \
    .class = (dev_class), \
    .vendor = SDIO_ANY_ID, .device = SDIO_ANY_ID

extern int sdio_register_driver(struct sdio_driver *);
extern void sdio_unregister_driver(struct sdio_driver *);

/*
 * SDIO I/O operations
 */
extern void sdio_claim_host(struct sdio_func *func);
extern void sdio_release_host(struct sdio_func *func);

extern int sdio_enable_func(struct sdio_func *func);
extern int sdio_disable_func(struct sdio_func *func);

extern int sdio_set_block_size(struct sdio_func *func, unsigned blksz);

extern int sdio_claim_irq(struct sdio_func *func, sdio_irq_handler_t *handler);
extern int sdio_release_irq(struct sdio_func *func);

extern unsigned int sdio_align_size(struct sdio_func *func, unsigned int sz);

extern u8 sdio_readb(struct sdio_func *func, unsigned int addr, int *err_ret);
extern u8 sdio_readb_ext(struct sdio_func *func, unsigned int addr, int *err_ret,
    unsigned in);
extern u16 sdio_readw(struct sdio_func *func, unsigned int addr, int *err_ret);
extern u32 sdio_readl(struct sdio_func *func, unsigned int addr, int *err_ret);

extern int sdio_memcpy_fromio(struct sdio_func *func, void *dst,
    unsigned int addr, int count);
extern int sdio_readsb(struct sdio_func *func, void *dst,
    unsigned int addr, int count);

extern void sdio_writeb(struct sdio_func *func, u8 b,
    unsigned int addr, int *err_ret);
extern void sdio_writew(struct sdio_func *func, u16 b,
    unsigned int addr, int *err_ret);
extern void sdio_writel(struct sdio_func *func, u32 b,
    unsigned int addr, int *err_ret);

extern int sdio_memcpy_toio(struct sdio_func *func, unsigned int addr,
    void *src, int count);
extern int sdio_writesb(struct sdio_func *func, unsigned int addr,
    void *src, int count);

extern unsigned char sdio_f0_readb(struct sdio_func *func,
    unsigned int addr, int *err_ret);
extern void sdio_f0_writeb(struct sdio_func *func, unsigned char b,
    unsigned int addr, int *err_ret);

extern mmc_pm_flag_t sdio_get_host_pm_caps(struct sdio_func *func);
extern int sdio_set_host_pm_flags(struct sdio_func *func, mmc_pm_flag_t flags);

#endif

第 169 行是#endif 之前的最后一行代码，但看到它我就是无法弄清楚它有什么问题。

Answer 1

mmc_pm_flag_t 编译器不知道类型。您是否包括了正确的标题？如果是，请检查 header 并查看是否需要启用某些宏。