Hi all, After merging the pm tree, today's linux-next build (x86_84 allmodconfig) failed like this: sound/soc/sh/rz-ssi.c: In function 'rz_ssi_probe': sound/soc/sh/rz-ssi.c:1023:2: error: ignoring return value of 'pm_runtime_resume_and_get' declared with attribute 'warn_unused_result' [-Werror=unused-result] 1023 | pm_runtime_resume_and_get(&pdev->dev); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ cc1: all warnings being treated as errors Caused by commit 877d952c261e ("PM: runtime: Annotate pm_runtime_resume_and_get() as __must_check") This also produced the following warnings in my arm multi_v7_defconfig build: drivers/crypto/stm32/stm32-hash.c: In function 'stm32_hash_hw_init': drivers/crypto/stm32/stm32-hash.c:816:2: warning: ignoring return value of 'pm_runtime_resume_and_get' declared with attribute 'warn_unused_result' [-Wunused-result] 816 | pm_runtime_resume_and_get(hdev->dev); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/crypto/stm32/stm32-hash.c: In function 'stm32_hash_import': drivers/crypto/stm32/stm32-hash.c:1003:2: warning: ignoring return value of 'pm_runtime_resume_and_get' declared with attribute 'warn_unused_result' [-Wunused-result] 1003 | pm_runtime_resume_and_get(hdev->dev); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/crypto/stm32/stm32-hash.c: In function 'stm32_hash_export': drivers/crypto/stm32/stm32-hash.c:965:2: warning: ignoring return value of 'pm_runtime_resume_and_get' declared with attribute 'warn_unused_result' [-Wunused-result] 965 | pm_runtime_resume_and_get(hdev->dev); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/crypto/stm32/stm32-cryp.c: In function 'stm32_cryp_hw_init': drivers/crypto/stm32/stm32-cryp.c:545:2: warning: ignoring return value of 'pm_runtime_resume_and_get' declared with attribute 'warn_unused_result' [-Wunused-result] 545 | pm_runtime_resume_and_get(cryp->dev); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ I have used the pm tree from next-20211224 for today. -- Cheers, Stephen Rothwell