linux-kernel - [PATCH] uapi: map_to_7segment: Update example in documentation

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Message-Id: <20210207130543.2128980-1-geert@linux-m68k.org>
Date:   Sun,  7 Feb 2021 14:05:43 +0100
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Henk Vergonet <Henk.Vergonet@...il.com>,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     linux-kernel@...r.kernel.org,
        Geert Uytterhoeven <geert@...ux-m68k.org>
Subject: [PATCH] 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: 54b6f35c99974e99 ("[PATCH] Driver core: change device_attribute callbacks")
Signed-off-by: Geert Uytterhoeven <geert@...ux-m68k.org>
---
This time with a modern address for Greg.

 include/uapi/linux/map_to_7segment.h | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/include/uapi/linux/map_to_7segment.h b/include/uapi/linux/map_to_7segment.h
index 13a06e5e966e53d2..8b02088f96e3733e 100644
--- a/include/uapi/linux/map_to_7segment.h
+++ b/include/uapi/linux/map_to_7segment.h
@@ -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@...r.kernel.org
-- 
2.25.1