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  • LDD3 scull 编译出错，解决过程【转】

    Download ldd_src.rar解压后得ldd_src,进入ldd_src/scull目录，
    执行 $ make 后报错如下：

    1. make -C /lib/modules/2.6.38-8-generic/build M=/home/eric/Downloads/ldd_src/scull LDDINC=/home/eric/Downloads/ldd_src/scull/../include modules
    2. make[1]: Entering directory `/usr/src/linux-headers-2.6.38-8-generic'
    3. scripts/Makefile.build:49: *** CFLAGS was changed in "/home/eric/Downloads/ldd_src/scull/Makefile". Fix it to use EXTRA_CFLAGS. Stop.
    4. make[1]: *** [_module_/home/eric/Downloads/ldd_src/scull] Error 2
    5. make[1]: Leaving directory `/usr/src/linux-headers-2.6.38-8-generic'
    6. make: *** [modules] Error 2

    根据出错提示，把Makefile中的CFLAGS 改为 EXTRA_CFLAGS，
    再 $ make 报错如下：

    1. make -C /lib/modules/2.6.38-8-generic/build M=/home/eric/Downloads/ldd_src_test/scull LDDINC=/home/eric/Downloads/ldd_src_test/scull/../include modules
    2. make[1]: Entering directory `/usr/src/linux-headers-2.6.38-8-generic'
    3.   CC [M] /home/eric/Downloads/ldd_src_test/scull/main.o
    4. /home/eric/Downloads/ldd_src_test/scull/main.c:17:26: fatal error: linux/config.h: No such file or directory
    5. compilation terminated.
    6. make[2]: *** [/home/eric/Downloads/ldd_src_test/scull/main.o] Error 1
    7. make[1]: *** [_module_/home/eric/Downloads/ldd_src_test/scull] Error 2
    8. make[1]: Leaving directory `/usr/src/linux-headers-2.6.38-8-generic'
    9. make: *** [modules] Error 2

    这个头文件config.h新版kernel已经没有了，简单的方法就是删除文件中的#include <linux/config.h>，但为了具有可移植性，我还是建议用下面这个方法：

    1. #include <linux/version.h>
    2. #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18))
    3. #include <linux/config.h>
    4. #endif


    再 $ make 报错如下：

    1. make -C /lib/modules/2.6.38-8-generic/build M=/home/eric/Downloads/ldd_src_test/scull LDDINC=/home/eric/Downloads/ldd_src_test/scull/../include modules
    2. make[1]: Entering directory `/usr/src/linux-headers-2.6.38-8-generic'
    3.   CC [M] /home/eric/Downloads/ldd_src_test/scull/main.o
    4. /home/eric/Downloads/ldd_src_test/scull/main.c:556:2: error: unknown field ‘ioctl’ specifiedin initializer
    5. /home/eric/Downloads/ldd_src_test/scull/main.c:556:2: warning: initialization from incompatible pointer type
    6. /home/eric/Downloads/ldd_src_test/scull/main.c: In function ‘scull_init_module’:
    7. /home/eric/Downloads/ldd_src_test/scull/main.c:652:3: error: implicit declaration of function ‘init_MUTEX’
    8. make[2]: *** [/home/eric/Downloads/ldd_src_test/scull/main.o] Error 1
    9. make[1]: *** [_module_/home/eric/Downloads/ldd_src_test/scull] Error 2
    10. make[1]: Leaving directory `/usr/src/linux-headers-2.6.38-8-generic'
    11. make: *** [modules] Error 2

    这是因为新版本的kernel(linux/fs.h)已对struct file_operations做了改动，先前的ioctl被unlocked_ioctl取代，所以，把所有程序中使用ioctl的地方改成unlocked_ioctl.
    再 $ make 报错如下：

    1. make -C /lib/modules/2.6.38-8-generic/build M=/home/eric/Downloads/ldd_src_test/scull LDDINC=/home/eric/Downloads/ldd_src_test/scull/../include modules
    2. make[1]: Entering directory `/usr/src/linux-headers-2.6.38-8-generic'
    3.   CC [M] /home/eric/Downloads/ldd_src_test/scull/main.o
    4. /home/eric/Downloads/ldd_src_test/scull/main.c:556:2: warning: initialization from incompatible pointer type
    5. /home/eric/Downloads/ldd_src_test/scull/main.c: In function ‘scull_init_module’:
    6. /home/eric/Downloads/ldd_src_test/scull/main.c:652:3: error: implicit declaration of function ‘init_MUTEX’
    7. make[2]: *** [/home/eric/Downloads/ldd_src_test/scull/main.o] Error 1
    8. make[1]: *** [_module_/home/eric/Downloads/ldd_src_test/scull] Error 2
    9. make[1]: Leaving directory `/usr/src/linux-headers-2.6.38-8-generic'
    10. make: *** [modules] Error 2

    这是因为 function ‘init_MUTEX’ 没有定义，可以修改一下linux/fs.h
    在#include <linux/semaphore.h> 之后加入：

    1. #define init_MUTEX(LOCKNAME) sema_init(LOCKNAME,1);

    再 $ make 报错如下：

    1. make -C /lib/modules/2.6.38-8-generic/build M=/home/eric/Downloads/ldd_src_test/scull LDDINC=/home/eric/Downloads/ldd_src_test/scull/../include modules
    2. make[1]: Entering directory `/usr/src/linux-headers-2.6.38-8-generic'
    3.   CC [M] /home/eric/Downloads/ldd_src_test/scull/main.o
    4. /home/eric/Downloads/ldd_src_test/scull/main.c:559:2: warning: initialization from incompatible pointer type
    5.   CC [M] /home/eric/Downloads/ldd_src_test/scull/pipe.o
    6. /home/eric/Downloads/ldd_src_test/scull/pipe.c: In function ‘scull_p_read’:
    7. /home/eric/Downloads/ldd_src_test/scull/pipe.c:131:7: error: ‘TASK_INTERRUPTIBLE’ undeclared(first use in this function)
    8. /home/eric/Downloads/ldd_src_test/scull/pipe.c:131:7: note: each undeclared identifier is reported only once for each function it appears in
    9. /home/eric/Downloads/ldd_src_test/scull/pipe.c:131:3: error: implicit declaration of function ‘signal_pending’
    10. /home/eric/Downloads/ldd_src_test/scull/pipe.c:131:3: error: implicit declaration of function ‘schedule’
    11. /home/eric/Downloads/ldd_src_test/scull/pipe.c: In function ‘scull_getwritespace’:
    12. /home/eric/Downloads/ldd_src_test/scull/pipe.c:168:38: error: ‘TASK_INTERRUPTIBLE’ undeclared (first use in this function)
    13. /home/eric/Downloads/ldd_src_test/scull/pipe.c: In function ‘scull_p_write’:
    14. /home/eric/Downloads/ldd_src_test/scull/pipe.c:219:2: error: ‘TASK_INTERRUPTIBLE’ undeclared(first use in this function)
    15. /home/eric/Downloads/ldd_src_test/scull/pipe.c:223:34: error: ‘SIGIO’ undeclared (first use in this function)
    16. /home/eric/Downloads/ldd_src_test/scull/pipe.c:223:41: error: ‘POLL_IN’ undeclared (first use in this function)
    17. /home/eric/Downloads/ldd_src_test/scull/pipe.c: At top level:
    18. /home/eric/Downloads/ldd_src_test/scull/pipe.c:319:2: warning: initialization from incompatible pointer type
    19. make[2]: *** [/home/eric/Downloads/ldd_src_test/scull/pipe.o] Error 1
    20. make[1]: *** [_module_/home/eric/Downloads/ldd_src_test/scull] Error 2
    21. make[1]: Leaving directory `/usr/src/linux-headers-2.6.38-8-generic'
    22. make: *** [modules] Error 2

    ‘TASK_INTERRUPTIBLE’ 未定义，这是因为没有include相应的头文件，它在哪个头文件中定义我们不知道，那么就搜一下include目录：

    1. grep -rn TASK_INTERRUPTIBLE /usr/src/linux-headers-2.6.38-8-generic/include/

    发现位于：

    1. /usr/src/linux-headers-2.6.38-8-generic/include/linux/sched.h:185:#define TASK_INTERRUPTIBLE    1

    在程序pipe.c，access.c头部添加上：
    #include <linux/sched.h>

    再 $ make 报错如下：

    1. make -C /lib/modules/2.6.38-8-generic/build M=/home/eric/Downloads/ldd_src_test/scull LDDINC=/home/eric/Downloads/ldd_src_test/scull/../include modules
    2. make[1]: Entering directory `/usr/src/linux-headers-2.6.38-8-generic'
    3.   CC [M] /home/eric/Downloads/ldd_src_test/scull/access.o
    4. /home/eric/Downloads/ldd_src_test/scull/access.c:84:2: warning: initialization from incompatible pointer type
    5. /home/eric/Downloads/ldd_src_test/scull/access.c: In function ‘scull_u_open’:
    6. /home/eric/Downloads/ldd_src_test/scull/access.c:107:29: error: ‘struct task_struct’ has no member named ‘uid’
    7. /home/eric/Downloads/ldd_src_test/scull/access.c:108:29: error: ‘struct task_struct’ has no member named ‘euid’
    8. /home/eric/Downloads/ldd_src_test/scull/access.c:115:26: error: ‘struct task_struct’ has no member named ‘uid’
    9. /home/eric/Downloads/ldd_src_test/scull/access.c: At top level:
    10. /home/eric/Downloads/ldd_src_test/scull/access.c:146:2: warning: initialization from incompatible pointer type
    11. /home/eric/Downloads/ldd_src_test/scull/access.c: In function ‘scull_w_available’:
    12. /home/eric/Downloads/ldd_src_test/scull/access.c:166:27: error: ‘struct task_struct’ has no member named ‘uid’
    13. /home/eric/Downloads/ldd_src_test/scull/access.c:167:27: error: ‘struct task_struct’ has no member named ‘euid’
    14. /home/eric/Downloads/ldd_src_test/scull/access.c: In function ‘scull_w_open’:
    15. /home/eric/Downloads/ldd_src_test/scull/access.c:185:26: error: ‘struct task_struct’ has no member named ‘uid’
    16. /home/eric/Downloads/ldd_src_test/scull/access.c: At top level:
    17. /home/eric/Downloads/ldd_src_test/scull/access.c:219:2: warning: initialization from incompatible pointer type
    18. /home/eric/Downloads/ldd_src_test/scull/access.c:318:2: warning: initialization from incompatible pointer type
    19. /home/eric/Downloads/ldd_src_test/scull/access.c: In function ‘scull_w_available’:
    20. /home/eric/Downloads/ldd_src_test/scull/access.c:169:1: warning: control reaches end of non-void function
    21. make[2]: *** [/home/eric/Downloads/ldd_src_test/scull/access.o] Error 1
    22. make[1]: *** [_module_/home/eric/Downloads/ldd_src_test/scull] Error 2
    23. make[1]: Leaving directory `/usr/src/linux-headers-2.6.38-8-generic'
    24. make: *** [modules] Error 2

    说task_struct结构体没有uid,euid成员变量，struct task_struct定义在include/linux/sched.h中，这主要是由于原来task_struct结构体定义有所改动，将uid和euid等挪到 cred中，见include/linux/sched.h和include/linux/cred.h。

    因此只需要将报error的代码做如下修改
    current->uid 修改为 current->cred->uid
    current->euid 修改为 current->cred->euid

    还有一个

    /home/wrk/works/drivers/ldd3/examples/scull/access.c:101:34: error: ‘SPIN_LOCK_UNLOCKED’ undeclared here (not in a function)

    原因：新版本内核中，SPIN_LOCK_UNLOCKED被移除

    建议：使用DEFINE_SPINLOCK(lock)宏来替代

    1. /*static spinlock_t scull_w_lock = SPIN_LOCK_UNLOCKED;*改成下面到方式/
    2. static DEFINE_SPINLOCK(scull_w_lock);


    然后编译，即可通过。
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  • 原文地址：https://www.cnblogs.com/02xiaoma/p/2831545.html
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