[kbuild-all] Re: [linux-next:master 4238/6654] include/linux/dmaengine.h:1576: undefined reference to `dma_request_chan'

On Fri, Sep 11, 2020 at 9:49 AM Peter Ujfalusi <peter.ujfalusi(a)ti.com&gt; wrote: > On 10/09/2020 14.18, Peter Ujfalusi wrote: >> On 10/09/2020 13.46, kernel test robot wrote: >>> tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master >>> head: 7ce53e3a447bced7b85ed181c4d027e93c062e07 >>> commit: 7547dbd3b198f309aaff54e3528898a8a196faff [4238/6654] dmaengine: Mark dma_request_slave_channel() deprecated >>> config: arm64-randconfig-r025-20200909 (attached as .config) >>> compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 0a5dc7effb191eff740e0e7ae7bd8e1f6bdb3ad9) ^^^ >>> reproduce (this is a W=1 build): >>> wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross >>> chmod +x ~/bin/make.cross >>> # install arm64 cross compiling tool for clang build >>> # apt-get install binutils-aarch64-linux-gnu >>> git checkout 7547dbd3b198f309aaff54e3528898a8a196faff >>> # save the attached .config to linux build tree >>> COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64 >> >> I'm not sure what is wrong, but can not reproduce it with GCC. > > I have tried with clang/llvm (10.0.1) without luck to reproduce. ^^^ 12.0.0 != 10.0.1

>>> If you fix the issue, kindly add following tag as appropriate >>> Reported-by: kernel test robot <lkp(a)intel.com&gt; >>> >>> All errors (new ones prefixed by >>): >>> >>> aarch64-linux-gnu-ld: warning: -z norelro ignored >>> aarch64-linux-gnu-ld: fs/orangefs/orangefs-debugfs.o: in function `orangefs_debug_read': >>> fs/orangefs/orangefs-debugfs.c:375: undefined reference to `stpcpy' >> >> Is this also caused by the blaimed patch? I think this is a part of the long (recent) discussion about clang optimisations.

>>> aarch64-linux-gnu-ld: security/apparmor/lsm.o: in function `param_get_mode': >>> security/apparmor/lsm.c:1559: undefined reference to `stpcpy' >>> aarch64-linux-gnu-ld: security/apparmor/lsm.o: in function `param_get_audit': >>> security/apparmor/lsm.c:1530: undefined reference to `stpcpy' >>> aarch64-linux-gnu-ld: drivers/tty/tty_io.o: in function `tty_line_name': >>> drivers/tty/tty_io.c:1139: undefined reference to `stpcpy' >>> aarch64-linux-gnu-ld: drivers/tty/tty_io.c:1139: undefined reference to `stpcpy' >>> aarch64-linux-gnu-ld: drivers/tty/tty_io.o:drivers/tty/tty_io.c:1139: more undefined references to `stpcpy' follow >>> aarch64-linux-gnu-ld: drivers/tty/serial/fsl_lpuart.o: in function `lpuart_remove': >>> drivers/tty/serial/fsl_lpuart.c:2663: undefined reference to `dma_release_channel' >>> aarch64-linux-gnu-ld: drivers/tty/serial/fsl_lpuart.c:2666: undefined reference to `dma_release_channel' >> >> #ifdef CONFIG_DMA_ENGINE >> struct dma_chan *dma_request_chan(struct device *dev, const char *name); >> #else >> static inline struct dma_chan *dma_request_chan(struct device *dev, >> const char *name) >> { >> return ERR_PTR(-ENODEV); >> } >> #endif >> >> static inline struct dma_chan * __deprecated >> dma_request_slave_channel(struct device *dev, const char *name) >> { >> struct dma_chan *ch = dma_request_chan(dev, name); >> >> return IS_ERR(ch) ? NULL : ch; >> } >> >> And in the included config we have: >> # CONFIG_DMADEVICES is not set >> CONFIG_DMA_ENGINE=y > > The .config get corrected all the time and the CONFIG_DMA_ENGINE goes > away, I can not make it stick.