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[129.46.96.20]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-31586402e53sm27472505eec.11.2026.08.05.11.54.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 05 Aug 2026 11:54:02 -0700 (PDT) From: Elson Serrao To: Sebastian Reichel Cc: Thinh Nguyen , linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, Randy Dunlap Subject: [PATCH] power: supply: add stubs for notifier registration helpers Date: Wed, 5 Aug 2026 11:54:01 -0700 Message-Id: <20260805185401.3625514-1-elson.serrao@oss.qualcomm.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Authority-Analysis: v=2.4 cv=Xea5Co55 c=1 sm=1 tr=0 ts=6a7386cc cx=c_pps a=mDZGXZTwRPZaeRUbqKGCBw==:117 a=ouPCqIW2jiPt+lZRy3xVPw==:17 a=Sv0fKeRqtYgA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=3WHJM1ZQz_JShphwDgj5:22 a=VwQbUJbxAAAA:8 a=JfrnYn6hAAAA:8 a=EUspDBNiAAAA:8 a=IYNAJtiqTZ58x4Z6ujwA:9 a=zc0IvFSfCIW2DFIPzwfm:22 a=1CNFftbPRP8L7MoqJWF3:22 X-Proofpoint-GUID: LjYdfOTTL3OUjh9zbmUQNIyaEl0rHG91 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwODA1MDE1NSBTYWx0ZWRfX07usOcA16eE7 Gw27ee1zwcNE4lKAbM88rfJrvK+vLwZ6rrgaOs2fN4vWDfVq/bOCHrPxtUj9sR9PfSxjNeAXxVc B7TkcGQvbkYepF0BakvTyuXrUMx1xyzdKutYVFI4i1+u2Qf+3LfGCBBTS1uiM8hag9uGnerwp66 AmxGmnpOkg9p1CmeoEqP7I4aMRqnt/wEOgz2UPEk07ujYfrUtrISyIF85gvm5JXAvgPT/3wMEpL kmz5m/LxcsIGt6dyywE7VJIe8M5pjsngLZbvRJKWdLysgr2p9Z8BGsNbDtLrR11lPFqkpP1Hf87 sAmUw+CqmNkluZ4Mi03uZ+6ZqG1qwN5/FhwbwNzgDl8wXi2Ayk4j7FDcHXkvlNTO8jiQmkcHMah mbsU+04gVNtT6cqHJJPbXWA0MQQpgtu2cgrA9myIDJYktnGrpNTf8Wry1FhXBlT60Me58Rv6XAC G/lmtC66V7S3967BJbw== X-Proofpoint-Spam-Info: AW1haW4tMjYwODA1MDE1NSBTYWx0ZWRfX223NpwIIrRx9 i/1aXzQMpTN4p+ZtTyE1mSsFc1uU5st0lOmy+JaJT8ZWcrLAM7lOcDEMO3uYz2ULDVgZ2vrfury 9X28s1sUMMOe+G/nQmRweyB+SvMWtW0= X-Proofpoint-ORIG-GUID: LjYdfOTTL3OUjh9zbmUQNIyaEl0rHG91 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-08-05_05,2026-08-05_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 malwarescore=0 spamscore=0 lowpriorityscore=0 adultscore=0 priorityscore=1501 suspectscore=0 bulkscore=0 clxscore=1015 phishscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2608050155 Content-Type: text/plain; charset="utf-8" power_supply_reg_notifier() and power_supply_unreg_notifier() are declared unconditionally, with no fallback when CONFIG_POWER_SUPPLY is disabled. Any driver that calls them unconditionally fails to link: ERROR: modpost: "power_supply_unreg_notifier" [drivers/usb/dwc3/dwc3.ko] undefined! ERROR: modpost: "power_supply_reg_notifier" [drivers/usb/dwc3/dwc3.ko] undefined! Fix this by adding stub functions for these calls. Fixes: 7c87ef27af79 ("usb: dwc3: avoid probe deferral when USB power supply= is not available") Reported-by: Randy Dunlap Closes: https://lore.kernel.org/all/a9dd53b3-0666-404a-99e0-76617ae3f944@in= fradead.org/ Signed-off-by: Elson Serrao Acked-by: Randy Dunlap Tested-by: Randy Dunlap --- include/linux/power_supply.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/include/linux/power_supply.h b/include/linux/power_supply.h index a9c056f13077..e749d2189335 100644 --- a/include/linux/power_supply.h +++ b/include/linux/power_supply.h @@ -816,15 +816,18 @@ struct power_supply_battery_info { int bti_resistance_tolerance; }; =20 +#if IS_ENABLED(CONFIG_POWER_SUPPLY) extern int power_supply_reg_notifier(struct notifier_block *nb); extern void power_supply_unreg_notifier(struct notifier_block *nb); -#if IS_ENABLED(CONFIG_POWER_SUPPLY) extern struct power_supply *power_supply_get_by_name(const char *name); extern int __must_check power_supply_get_system_batteries(struct device *d= ev, struct power_supply ***psys); extern void power_supply_put_system_batteries(struct power_supply **psys, = int count); extern void power_supply_put(struct power_supply *psy); #else +static inline int power_supply_reg_notifier(struct notifier_block *nb) +{ return -EOPNOTSUPP; } +static inline void power_supply_unreg_notifier(struct notifier_block *nb) = {} static inline void power_supply_put(struct power_supply *psy) {} static inline struct power_supply *power_supply_get_by_name(const char *na= me) { return NULL; } --=20 2.34.1