Hi, [auto build test WARNING on hid/for-next] [also build test WARNING on v4.6-rc4 next-20160421] [if your patch is applied to the wrong git tree, please drop us a note to help improving the system] url: https://github.com/0day-ci/linux/commits/roderick-gaikai-com/HID-uhid-Fixes-a-bug-with-userspace-bluetooth-stacks-which-causes-hangs-during-certain-operations/20160422-050505 base: https://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid.git for-next config: x86_64-randconfig-x003-201616 (attached as .config) reproduce: # save the attached .config to linux build tree make ARCH=x86_64 All warnings (new ones prefixed by >>): In file included from arch/x86/include/asm/atomic.h:4:0, from include/linux/atomic.h:4, from drivers/hid/uhid.c:13: drivers/hid/uhid.c: In function 'uhid_event_from_user': drivers/hid/uhid.c:403:6: error: implicit declaration of function 'is_compat_task' [-Werror=implicit-function-declaration] if (is_compat_task()) { ^ include/linux/compiler.h:151:30: note: in definition of macro '__trace_if' if (__builtin_constant_p(!!(cond)) ? !!(cond) : \ ^ >> drivers/hid/uhid.c:403:2: note: in expansion of macro 'if' if (is_compat_task()) { ^ cc1: some warnings being treated as errors vim +/if +403 drivers/hid/uhid.c 387 __u8 phys[64]; 388 __u8 uniq[64]; 389 390 compat_uptr_t rd_data; 391 __u16 rd_size; 392 393 __u16 bus; 394 __u32 vendor; 395 __u32 product; 396 __u32 version; 397 __u32 country; 398 } __attribute__((__packed__)); 399 400 static int uhid_event_from_user(const char __user *buffer, size_t len, 401 struct uhid_event *event) 402 { > 403 if (is_compat_task()) { 404 u32 type; 405 406 if (get_user(type, buffer)) 407 return -EFAULT; 408 409 if (type == UHID_CREATE) { 410 /* 411 * This is our messed up request with compat pointer. --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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