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Message-ID: <202601202126.NVP5cs8k-lkp@intel.com> Date: Tue, 20 Jan 2026 21:37:11 +0800 From: kernel test robot <lkp@...el.com> To: Zhi Wang <zhiw@...dia.com>, rust-for-linux@...r.kernel.org, linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev, dakr@...nel.org, aliceryhl@...gle.com, bhelgaas@...gle.com, kwilczynski@...nel.org, ojeda@...nel.org, alex.gaynor@...il.com, boqun.feng@...il.com, gary@...yguo.net, bjorn3_gh@...tonmail.com, lossin@...nel.org, a.hindborg@...nel.org, tmgross@...ch.edu, markus.probst@...teo.de, helgaas@...nel.org, cjia@...dia.com, smitra@...dia.com, ankita@...dia.com, aniketa@...dia.com, kwankhede@...dia.com, targupta@...dia.com, acourbot@...dia.com, joelagnelf@...dia.com, jhubbard@...dia.com, zhiwang@...nel.org, daniel.almeida@...labora.com, Zhi Wang <zhiw@...dia.com> Subject: Re: [PATCH v10 2/5] rust: io: separate generic I/O helpers from MMIO implementation Hi Zhi, kernel test robot noticed the following build errors: [auto build test ERROR on driver-core/driver-core-testing] [also build test ERROR on driver-core/driver-core-next] [cannot apply to driver-core/driver-core-linus pci/next pci/for-linus drm-rust/drm-rust-next linus/master v6.19-rc6 next-20260119] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Zhi-Wang/rust-devres-style-for-imports/20260120-042526 base: driver-core/driver-core-testing patch link: https://lore.kernel.org/r/20260119202250.870588-3-zhiw%40nvidia.com patch subject: [PATCH v10 2/5] rust: io: separate generic I/O helpers from MMIO implementation config: x86_64-buildonly-randconfig-004-20260120 (https://download.01.org/0day-ci/archive/20260120/202601202126.NVP5cs8k-lkp@intel.com/config) compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261) rustc: rustc 1.88.0 (6b00bc388 2025-06-23) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260120/202601202126.NVP5cs8k-lkp@intel.com/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@...el.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202601202126.NVP5cs8k-lkp@intel.com/ All errors (new ones prefixed by >>): >> error[E0599]: no method named `try_read32` found for reference `&Mmio<176>` in the current scope --> drivers/pwm/pwm_th1520.rs:241:26 | 241 | let ctrl = iomap.try_read32(th1520_pwm_ctrl(hwpwm))?; | ^^^^^^^^^^ | = help: items from traits can only be used if the trait is in scope help: trait `Io` which provides `try_read32` is implemented but not in scope; perhaps you want to import it | 23 + use kernel::io::Io; | help: there is a method `try_read` with a similar name | 241 - let ctrl = iomap.try_read32(th1520_pwm_ctrl(hwpwm))?; 241 + let ctrl = iomap.try_read(th1520_pwm_ctrl(hwpwm))?; | -- >> error[E0599]: no method named `try_read32` found for reference `&Mmio<176>` in the current scope --> drivers/pwm/pwm_th1520.rs:242:35 | 242 | let period_cycles = iomap.try_read32(th1520_pwm_per(hwpwm))?; | ^^^^^^^^^^ | = help: items from traits can only be used if the trait is in scope help: trait `Io` which provides `try_read32` is implemented but not in scope; perhaps you want to import it | 23 + use kernel::io::Io; | help: there is a method `try_read` with a similar name | 242 - let period_cycles = iomap.try_read32(th1520_pwm_per(hwpwm))?; 242 + let period_cycles = iomap.try_read(th1520_pwm_per(hwpwm))?; | -- >> error[E0599]: no method named `try_write32` found for reference `&Mmio<176>` in the current scope --> drivers/pwm/pwm_th1520.rs:294:15 | 294 | iomap.try_write32( | ------^^^^^^^^^^^ | = help: items from traits can only be used if the trait is in scope help: trait `Io` which provides `try_write32` is implemented but not in scope; perhaps you want to import it | 23 + use kernel::io::Io; | help: there is a method `try_write` with a similar name | 294 - iomap.try_write32( 294 + iomap.try_write( | -- >> error[E0599]: no method named `try_write32` found for reference `&Mmio<176>` in the current scope --> drivers/pwm/pwm_th1520.rs:302:19 | 302 | iomap.try_write32(wfhw.ctrl_val | TH1520_PWM_START, th1520_pwm_ctrl(hwpwm))?; | ^^^^^^^^^^^ | = help: items from traits can only be used if the trait is in scope help: trait `Io` which provides `try_write32` is implemented but not in scope; perhaps you want to import it | 23 + use kernel::io::Io; | help: there is a method `try_write` with a similar name | 302 - iomap.try_write32(wfhw.ctrl_val | TH1520_PWM_START, th1520_pwm_ctrl(hwpwm))?; 302 + iomap.try_write(wfhw.ctrl_val | TH1520_PWM_START, th1520_pwm_ctrl(hwpwm))?; | -- >> error[E0599]: no method named `try_read32` found for reference `&Mmio<176>` in the current scope --> drivers/pwm/pwm_th1520.rs:243:33 | 243 | let duty_cycles = iomap.try_read32(th1520_pwm_fp(hwpwm))?; | ^^^^^^^^^^ | = help: items from traits can only be used if the trait is in scope help: trait `Io` which provides `try_read32` is implemented but not in scope; perhaps you want to import it | 23 + use kernel::io::Io; | help: there is a method `try_read` with a similar name | 243 - let duty_cycles = iomap.try_read32(th1520_pwm_fp(hwpwm))?; 243 + let duty_cycles = iomap.try_read(th1520_pwm_fp(hwpwm))?; | -- >> error[E0599]: no method named `try_read32` found for reference `&Mmio<176>` in the current scope --> drivers/pwm/pwm_th1520.rs:275:33 | 275 | let duty_cycles = iomap.try_read32(th1520_pwm_fp(hwpwm))?; | ^^^^^^^^^^ | = help: items from traits can only be used if the trait is in scope help: trait `Io` which provides `try_read32` is implemented but not in scope; perhaps you want to import it | 23 + use kernel::io::Io; | help: there is a method `try_read` with a similar name | 275 - let duty_cycles = iomap.try_read32(th1520_pwm_fp(hwpwm))?; 275 + let duty_cycles = iomap.try_read(th1520_pwm_fp(hwpwm))?; | -- >> error[E0599]: no method named `try_write32` found for reference `&Mmio<176>` in the current scope --> drivers/pwm/pwm_th1520.rs:281:23 | 281 | iomap.try_write32(wfhw.ctrl_val, th1520_pwm_ctrl(hwpwm))?; | ^^^^^^^^^^^ | = help: items from traits can only be used if the trait is in scope help: trait `Io` which provides `try_write32` is implemented but not in scope; perhaps you want to import it | 23 + use kernel::io::Io; | help: there is a method `try_write` with a similar name | 281 - iomap.try_write32(wfhw.ctrl_val, th1520_pwm_ctrl(hwpwm))?; 281 + iomap.try_write(wfhw.ctrl_val, th1520_pwm_ctrl(hwpwm))?; | -- >> error[E0599]: no method named `try_write32` found for reference `&Mmio<176>` in the current scope --> drivers/pwm/pwm_th1520.rs:282:23 | 282 | iomap.try_write32(0, th1520_pwm_fp(hwpwm))?; | ^^^^^^^^^^^ | = help: items from traits can only be used if the trait is in scope help: trait `Io` which provides `try_write32` is implemented but not in scope; perhaps you want to import it | 23 + use kernel::io::Io; | help: there is a method `try_write` with a similar name | 282 - iomap.try_write32(0, th1520_pwm_fp(hwpwm))?; 282 + iomap.try_write(0, th1520_pwm_fp(hwpwm))?; | -- >> error[E0599]: no method named `try_write32` found for reference `&Mmio<176>` in the current scope --> drivers/pwm/pwm_th1520.rs:283:23 | 283 | iomap.try_write32( | ------^^^^^^^^^^^ | = help: items from traits can only be used if the trait is in scope help: trait `Io` which provides `try_write32` is implemented but not in scope; perhaps you want to import it | 23 + use kernel::io::Io; | help: there is a method `try_write` with a similar name | 283 - iomap.try_write32( 283 + iomap.try_write( | -- >> error[E0599]: no method named `try_write32` found for reference `&Mmio<176>` in the current scope --> drivers/pwm/pwm_th1520.rs:291:15 | 291 | iomap.try_write32(wfhw.ctrl_val, th1520_pwm_ctrl(hwpwm))?; | ^^^^^^^^^^^ | = help: items from traits can only be used if the trait is in scope help: trait `Io` which provides `try_write32` is implemented but not in scope; perhaps you want to import it | 23 + use kernel::io::Io; | help: there is a method `try_write` with a similar name | 291 - iomap.try_write32(wfhw.ctrl_val, th1520_pwm_ctrl(hwpwm))?; 291 + iomap.try_write(wfhw.ctrl_val, th1520_pwm_ctrl(hwpwm))?; | -- >> error[E0599]: no method named `try_write32` found for reference `&Mmio<176>` in the current scope --> drivers/pwm/pwm_th1520.rs:292:15 | 292 | iomap.try_write32(wfhw.period_cycles, th1520_pwm_per(hwpwm))?; | ^^^^^^^^^^^ | = help: items from traits can only be used if the trait is in scope help: trait `Io` which provides `try_write32` is implemented but not in scope; perhaps you want to import it | 23 + use kernel::io::Io; | help: there is a method `try_write` with a similar name | 292 - iomap.try_write32(wfhw.period_cycles, th1520_pwm_per(hwpwm))?; 292 + iomap.try_write(wfhw.period_cycles, th1520_pwm_per(hwpwm))?; 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