Scull在2.6.35-30内核中的编译解决方案

/media/orientation/driver/ldd3/examples/scull/access.c：179： error： implicit declaration offunction ‘signal_pending’/media/orientation/driver/ldd3/examples/scull/access.c：179： error： implicit declaration offunction ‘schedule’/media/orientation/driver/ldd3/examples/scull/access.c：184： error： dereferencing pointer to incomplete type /media/orientation/driver/ldd3/examples/scull/access.c： In function ‘scull_w_release’：/media/orientation/driver/ldd3/examples/scull/access.c：205： error： ‘TASK_INTERRUPTIBLE’ undeclared （first use in this function）

/media/orientation/driver/ldd3/examples/scull/access.c： In function ‘scull_c_open’：/media/orientation/driver/ldd3/examples/scull/access.c：277： error： dereferencing pointer to incomplete type /media/orientation/driver/ldd3/examples/scull/access.c：281： error： dereferencing pointer to incomplete type make[2]： *** [/media/orientation/driver/ldd3/examples/scull/access.o] Error 1 make[1]： *** [_module_/media/orientation/driver/ldd3/examples/scull] Error 2 make[1]： Leaving directory `/usr/src/linux-headers-2.6.32-28-generic' make： *** [modules] Error 2 7、根据提示，同上所述，我们需要在access.c中加入头文件sched.h>，接着编译：

make -C /lib/modules/2.6.35-30-generic/build M=/media/orientation/driver/ldd3/examples/scull LDDINC=/media/orientation/driver/ldd3/examples/scull/……/include modules make[1]： Entering directory `/usr/src/linux-headers-2.6.32-28-generic' CC [M] /media/orientation/driver/ldd3/examples/scull/access.o /media/orientation/driver/ldd3/examples/scull/access.c： In function ‘scull_u_open’：/media/orientation/driver/ldd3/examples/scull/access.c：106： error： ‘struct task_struct’ has no member named ‘uid’/media/orientation/driver/ldd3/examples/scull/access.c：107： error： ‘struct task_struct’ has no member named ‘euid’/media/orientation/driver/ldd3/examples/scull/access.c：114： error： ‘struct task_struct’ has no member named ‘uid’/media/orientation/driver/ldd3/examples/scull/access.c： In function ‘scull_w_available’：/media/orientation/driver/ldd3/examples/scull/access.c：165： error： ‘struct task_struct’ has no member named ‘uid’/media/orientation/driver/ldd3/examples/scull/access.c：166： error： ‘struct task_struct’ has no member named ‘euid’/media/orientation/driver/ldd3/examples/scull/access.c： In function ‘scull_w_open’：/media/orientation/driver/ldd3/examples/scull/access.c：184： error： ‘struct task_struct’ has no member named ‘uid’make[2]： *** [/media/orientation/driver/ldd3/examples/scull/access.o] Error 1 make[1]： *** [_module_/media/orientation/driver/ldd3/examples/scull] Error 2 make[1]： Leaving directory `/usr/src/linux-headers-2.6.32-28-generic' make： *** [modules] Error 2 8、根据提示，错误在于task_struct结构体没有uid，euid成员变量，查看源码发现struct task_struct定义在include/linux/sched.h中，确实没有这两个成员，逐个成员分析发现，这两个成员在2.6.35内核中放在const struct cred *cred成员中了，所以，我们尝试将所有出现错误的地方做如下改动：

current->uid 修改为 current->cred->uid current->euid 修改为 current->cred->euid 9、接着make，发现成功编译。