使用percpu变量时编译报错：
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### make in drv make -C /usr/src/linux-wm M=/Packet/ac/module/saas_ctl/drv modules CC [M] /Packet/ac/module/saas_ctl/drv/saas_action.o CC [M] /Packet/ac/module/saas_ctl/drv/saas_main.o /Packet/ac/module/saas_ctl/drv/saas_main.c: In function 'match_saas_rules': /Packet/ac/module/saas_ctl/drv/saas_main.c:395: error: 'per_cpu__g_ssl_cpu_data' undeclared (first use in this function) /Packet/ac/module/saas_ctl/drv/saas_main.c:395: error: (Each undeclared identifier is reported only once /Packet/ac/module/saas_ctl/drv/saas_main.c:395: error: for each function it appears in.) cc1: warnings being treated as errors /Packet/ac/module/saas_ctl/drv/saas_main.c:395: error: type defaults to 'int' in declaration of 'type name' /Packet/ac/module/saas_ctl/drv/saas_main.c:395: error: invalid type argument of 'unary *' (have 'int') make[3]: *** [/Packet/ac/module/saas_ctl/drv/saas_main.o] Error 1 make[2]: *** [_module_/Packet/ac/module/saas_ctl/drv] Error 2 make[1]: *** [all] Error 2 make: *** [drv] Error 2 |
原因：
percpu变量是在其他模块定义的，当前模块使用要声明：
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DECLARE_PER_CPU(type, name); |
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