The addition of the debugfs info created references to seq_puts() and seq_printf(), but relied on the debugfs header to be included implicitly, which apparently doesn't happen all the time, as seen from this randconfig build output:
drivers/gpu/drm/drm_dp_helper.c: In function 'drm_dp_downstream_debug': drivers/gpu/drm/drm_dp_helper.c:552:2: error: implicit declaration of function 'seq_printf' [-Werror=implicit-function-declaration] drivers/gpu/drm/drm_dp_helper.c:560:3: error: implicit declaration of function 'seq_puts' [-Werror=implicit-function-declaration]
Adding the extra include brings back a clean build.
Fixes: 80209e5f2c42 ("drm: Add DP branch device info on debugfs") Signed-off-by: Arnd Bergmann arnd@arndb.de --- drivers/gpu/drm/drm_dp_helper.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c index a07adf0a07db..3e6fe82c6d64 100644 --- a/drivers/gpu/drm/drm_dp_helper.c +++ b/drivers/gpu/drm/drm_dp_helper.c @@ -27,6 +27,7 @@ #include <linux/errno.h> #include <linux/sched.h> #include <linux/i2c.h> +#include <linux/seq_file.h> #include <drm/drm_dp_helper.h> #include <drm/drmP.h>