diff options
| author | Kent Gibson <warthog618@gmail.com> | 2020-10-05 15:03:29 +0800 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2020-10-28 15:46:47 +0100 |
| commit | 2f84a2de539cc4301a332c2c76473fc25baf21b7 (patch) | |
| tree | 57ccade43ec09697a2957a97d5455470019c469f /include/uapi | |
| parent | c303c51c87a61ace7330b5e0217468b1b8f98a75 (diff) | |
gpio: uapi: clarify the meaning of 'empty' char arrays
Clarify that a char array containing a string is considered 'empty' if
the first character is the null terminator. The remaining characters
are not relevant to this determination.
Signed-off-by: Kent Gibson <warthog618@gmail.com>
Reviewed-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20201005070329.21055-6-warthog618@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'include/uapi')
| -rw-r--r-- | include/uapi/linux/gpio.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/include/uapi/linux/gpio.h b/include/uapi/linux/gpio.h index ad3f56dd87ec..2072c260f5d0 100644 --- a/include/uapi/linux/gpio.h +++ b/include/uapi/linux/gpio.h @@ -26,7 +26,7 @@ * struct gpiochip_info - Information about a certain GPIO chip * @name: the Linux kernel name of this GPIO chip * @label: a functional name for this GPIO chip, such as a product - * number, may be empty + * number, may be empty (i.e. label[0] == '\0') * @lines: number of GPIO lines on this chip */ struct gpiochip_info { @@ -203,7 +203,7 @@ struct gpio_v2_line_request { * struct gpio_v2_line_info - Information about a certain GPIO line * @name: the name of this GPIO line, such as the output pin of the line on * the chip, a rail or a pin header name on a board, as specified by the - * GPIO chip, may be empty + * GPIO chip, may be empty (i.e. name[0] == '\0') * @consumer: a functional name for the consumer of this GPIO line as set * by whatever is using it, will be empty if there is no current user but * may also be empty if the consumer doesn't set this up @@ -315,7 +315,7 @@ struct gpio_v2_line_event { * @flags: various flags for this line * @name: the name of this GPIO line, such as the output pin of the line on the * chip, a rail or a pin header name on a board, as specified by the gpio - * chip, may be empty + * chip, may be empty (i.e. name[0] == '\0') * @consumer: a functional name for the consumer of this GPIO line as set by * whatever is using it, will be empty if there is no current user but may * also be empty if the consumer doesn't set this up |