[PATCH] coccinelle: api: add kobj_to_dev.cocci script

[Denis Efremov]

Use kobj_to_dev() instead of container_of().

Signed-off-by: Denis Efremov <efremov@xxxxxxxxx>
---
Examples of such patches:
893c3d82b425 watchdog: Use kobj_to_dev() API
23fd63a44460 hwmon: (nct6683) Replace container_of() with  kobj_to_dev()
224941c9424f power: supply: use kobj_to_dev
a9b9b2af40c7 backlight: lm3533_bl: Use kobj_to_dev() instead
0acb47a3a093 qlcnic: Use kobj_to_dev() instead
97cd738c44c8 gpiolib: sysfs: use kobj_to_dev
d06f9e6c8960 hwmon: (nct7802) Replace container_of() API
036855a4c3b3 hwmon : (nct6775) Use kobj_to_dev() API
baf1d9c18293 driver/base/soc: Use kobj_to_dev() API
ae243ef0afbc rtc: sysfs: use kobj_to_dev
6b060d8a09e9 i2c: use kobj_to_dev() API
9e7bd945b9a9 scsi: core: use kobj_to_dev
0d730b57b95f s390/cio: use kobj_to_dev() API
0616ca73fd35 usb: use kobj_to_dev() API
8c9b839c0b80 alpha: use kobj_to_dev()
016c0bbae1d1 netxen: Use kobj_to_dev()
6908b45eafc4 GenWQE: use kobj_to_dev()
85f4f39c80e9 pch_phub: use kobj_to_dev()
47679cde604d misc: c2port: use kobj_to_dev()
85016ff33f35 misc: cxl: use kobj_to_dev()
092462c2b522 misc: eeprom: use kobj_to_dev()
a9c9d9aca4e7 zorro: Use kobj_to_dev()
a253f1eee6c4 rapidio: use kobj_to_dev()
e3837b00b6bb drm/radeon: use kobj_to_dev()
cc29ec874b37 drm/amdgpu: use kobj_to_dev()
d122cbf1a310 drm/sysfs: use kobj_to_dev()
657fb5fbadb3 drm/i915: use kobj_to_dev()
554a60379aaa PCI: Use kobj_to_dev() instead of open-coding it
2cf83833fc9c HID: use kobj_to_dev()
aeb7ed14fe5d bridge: use kobj_to_dev instead of to_dev
8e3829c61b48 staging:iio:adis16220: Use kobj_to_dev instead of open-coding it
b0d1f807f340 driver-core: Use kobj_to_dev instead of re-implementing it

 scripts/coccinelle/api/kobj_to_dev.cocci | 44 ++++++++++++++++++++++++
 1 file changed, 44 insertions(+)
 create mode 100644 scripts/coccinelle/api/kobj_to_dev.cocci

diff --git a/scripts/coccinelle/api/kobj_to_dev.cocci b/scripts/coccinelle/api/kobj_to_dev.cocci
new file mode 100644
index 000000000000..e2cdd424aeca
--- /dev/null
+++ b/scripts/coccinelle/api/kobj_to_dev.cocci
@@ -0,0 +1,44 @@
+// SPDX-License-Identifier: GPL-2.0-only
+///
+/// Use kobj_to_dev() instead of container_of()
+///
+// Confidence: High
+// Copyright: (C) 2020 Denis Efremov ISPRAS
+// Options: --no-includes --include-headers
+//
+// Keywords: kobj_to_dev, container_of
+//
+
+virtual context
+virtual report
+virtual org
+virtual patch
+
+
+@r depends on !patch@
+expression ptr;
+position p;
+@@
+
+* container_of(ptr, struct device, kobj)@p
+
+
+@depends on patch@
+expression ptr;
+@@
+
+- container_of(ptr, struct device, kobj)
++ kobj_to_dev(ptr)
+
+
+@script:python depends on report@
+p << r.p;
+@@
+
+coccilib.report.print_report(p[0], "WARNING opportunity for kobj_to_dev()")
+
+@script:python depends on org@
+p << r.p;
+@@
+
+coccilib.org.print_todo(p[0], "WARNING opportunity for kobj_to_dev()")
-- 
2.26.2