Commit 0566752c authored by Geert Uytterhoeven's avatar Geert Uytterhoeven Committed by Greg Kroah-Hartman
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uapi: map_to_7segment: Update example in documentation 



The device_attribute .show() and .store() methods gained an extra
parameter in v2.6.13, but the example in the documentation for the
7-segment header file was never updated.  Add the missing parameters.

While at it, get rid of the (misspelled) deprecated symbolic
permissions, and switch to DEVICE_ATTR_RW(), which was introduced in
v3.11

Fixes: 54b6f35c ("[PATCH] Driver core: change device_attribute callbacks")
Signed-off-by: default avatarGeert Uytterhoeven <geert@linux-m68k.org>
Link: https://lore.kernel.org/r/20210207130543.2128980-1-geert@linux-m68k.org


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 61de21a8

include/uapi/linux/map_to_7segment.h

+8 −3
Original line number Diff line number Diff line
@@ -45,17 +45,22 @@ 
 * In device drivers it is recommended, if required, to make the char map

 * accessible via the sysfs interface using the following scheme:

 *

 * static ssize_t show_map(struct device *dev, char *buf) {

 * static ssize_t map_seg7_show(struct device *dev,

 *				struct device_attribute *attr, char *buf)

 * {

 *	memcpy(buf, &map_seg7, sizeof(map_seg7));

 *	return sizeof(map_seg7);

 * }

 * static ssize_t store_map(struct device *dev, const char *buf, size_t cnt) {

 * static ssize_t map_seg7_store(struct device *dev,

 *				 struct device_attribute *attr, const char *buf,

 *				 size_t cnt)

 * {

 *	if(cnt != sizeof(map_seg7))

 *		return -EINVAL;

 *	memcpy(&map_seg7, buf, cnt);

 *	return cnt;

 * }

 * static DEVICE_ATTR(map_seg7, PERMS_RW, show_map, store_map);

 * static DEVICE_ATTR_RW(map_seg7);

 *

 * History:

 * 2005-05-31	RFC linux-kernel@vger.kernel.org