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@xxxxxxxx>
---
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>
--
2.9.0
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