tree: git://anongit.freedesktop.org/drm-intel for-linux-next head: 80209e5f2c42c491ec5f4a63705b4377b407587c commit: 80209e5f2c42c491ec5f4a63705b4377b407587c [12/12] drm: Add DP branch device info on debugfs config: ia64-defconfig (attached as .config) compiler: ia64-linux-gcc (GCC) 4.9.0 reproduce: wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/ma... -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 80209e5f2c42c491ec5f4a63705b4377b407587c # save the attached .config to linux build tree make.cross ARCH=ia64

All errors (new ones prefixed by >>):

drivers/gpu/drm/drm_dp_helper.c: In function 'drm_dp_downstream_debug':

...

drivers/gpu/drm/drm_dp_helper.c:551:2: error: implicit declaration of function 'seq_printf' [-Werror=implicit-function-declaration]

seq_printf(m, "\tDP branch device present: %s\n", ^

...

drivers/gpu/drm/drm_dp_helper.c:559:3: error: implicit declaration of function 'seq_puts' [-Werror=implicit-function-declaration]

seq_puts(m, "\t\tType: DisplayPort\n"); ^ cc1: some warnings being treated as errors

vim +/seq_printf +551 drivers/gpu/drm/drm_dp_helper.c

545 int len; 546 uint8_t rev[2]; 547 int type = port_cap[0] & DP_DS_PORT_TYPE_MASK; 548 bool branch_device = dpcd[DP_DOWNSTREAMPORT_PRESENT] & 549 DP_DWN_STRM_PORT_PRESENT; 550

551 seq_printf(m, "\tDP branch device present: %s\n",

552 branch_device ? "yes" : "no"); 553 554 if (!branch_device) 555 return; 556 557 switch (type) { 558 case DP_DS_PORT_TYPE_DP:

559 seq_puts(m, "\t\tType: DisplayPort\n");

560 break; 561 case DP_DS_PORT_TYPE_VGA: 562 seq_puts(m, "\t\tType: VGA\n");

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