All extern functions of drivers/gpio/gpiolib.c are already inside the Kernel documentation, as driver-api/gpio/index.rst already includes it. Placing a kernel-doc here will only cause mess, as the same symbol will be placed on two parts of the document, causing breakages in cross-references. So, instead, add a cross-reference there. This solves those Sphinx 3.1+ warnings: .../Documentation/driver-api/hte/tegra194-hte:28: ./drivers/gpio/gpiolib.c:2464: WARNING: Duplicate C declaration, also defined at driver-api/gpio/index:2464. .../Documentation/driver-api/hte/tegra194-hte:28: ./drivers/gpio/gpiolib.c:2493: WARNING: Duplicate C declaration, also defined at driver-api/gpio/index:2493. .../Documentation/driver-api/hte/tegra194-hte.rst:2464: WARNING: Duplicate C declaration, also defined at driver-api/gpio/index:2464. .../Documentation/driver-api/hte/tegra194-hte.rst:2464: WARNING: Duplicate C declaration, also defined at driver-api/gpio/index:2464. .../Documentation/driver-api/hte/tegra194-hte.rst:2464: WARNING: Duplicate C declaration, also defined at driver-api/gpio/index:2464. .../Documentation/driver-api/hte/tegra194-hte.rst:2493: WARNING: Duplicate C declaration, also defined at driver-api/gpio/index:2493. .../Documentation/driver-api/hte/tegra194-hte.rst:2493: WARNING: Duplicate C declaration, also defined at driver-api/gpio/index:2493. .../Documentation/driver-api/hte/tegra194-hte.rst:2493: WARNING: Duplicate C declaration, also defined at driver-api/gpio/index:2493. Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx> --- To avoid mailbombing on a large number of people, only mailing lists were C/C on the cover. See [PATCH 00/12] at: https://lore.kernel.org/all/cover.1656759988.git.mchehab@xxxxxxxxxx/ Documentation/driver-api/hte/tegra194-hte.rst | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/Documentation/driver-api/hte/tegra194-hte.rst b/Documentation/driver-api/hte/tegra194-hte.rst index d29b7fe86f31..f2d617265546 100644 --- a/Documentation/driver-api/hte/tegra194-hte.rst +++ b/Documentation/driver-api/hte/tegra194-hte.rst @@ -25,8 +25,7 @@ and userspace consumers. The kernel space consumers can directly talk to HTE subsystem while userspace consumers timestamp requests go through GPIOLIB CDEV framework to HTE subsystem. -.. kernel-doc:: drivers/gpio/gpiolib.c - :functions: gpiod_enable_hw_timestamp_ns gpiod_disable_hw_timestamp_ns +See gpiod_enable_hw_timestamp_ns() and gpiod_disable_hw_timestamp_ns(). For userspace consumers, GPIO_V2_LINE_FLAG_EVENT_CLOCK_HTE flag must be specified during IOCTL calls. Refer to ``tools/gpio/gpio-event-mon.c``, which -- 2.36.1