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Date: Tue, 11 May 2021 18:17:08 +0300
From: Dmitry Osipenko <digetx@...il.com>
To: kernel test robot <lkp@...el.com>,
Thierry Reding <thierry.reding@...il.com>,
Jonathan Hunter <jonathanh@...dia.com>,
Krzysztof Kozlowski <krzk@...nel.org>
Cc: kbuild-all@...ts.01.org, clang-built-linux@...glegroups.com,
linux-kernel@...r.kernel.org, linux-tegra@...r.kernel.org
Subject: Re: [PATCH v1 2/2] memory: tegra: Enable compile testing for all
drivers
11.05.2021 16:58, kernel test robot пишет:
> Hi Dmitry,
>
> I love your patch! Perhaps something to improve:
>
> [auto build test WARNING on tegra/for-next]
> [also build test WARNING on v5.13-rc1 next-20210511]
> [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]
>
> url: https://github.com/0day-ci/linux/commits/Dmitry-Osipenko/Enable-compile-testing-for-Tegra-memory-drivers/20210511-053910
> base: https://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux.git for-next
> config: powerpc-randconfig-r032-20210511 (attached as .config)
> compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project a0fed635fe1701470062495a6ffee1c608f3f1bc)
> 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 powerpc cross compiling tool for clang build
> # apt-get install binutils-powerpc-linux-gnu
> # https://github.com/0day-ci/linux/commit/ecd67b1d49eb33c9821130a2b3b896bab395118d
> git remote add linux-review https://github.com/0day-ci/linux
> git fetch --no-tags linux-review Dmitry-Osipenko/Enable-compile-testing-for-Tegra-memory-drivers/20210511-053910
> git checkout ecd67b1d49eb33c9821130a2b3b896bab395118d
> # save the attached .config to linux build tree
> COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=powerpc
>
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@...el.com>
>
> All warnings (new ones prefixed by >>):
>
> __do_insb
> ^
> arch/powerpc/include/asm/io.h:556:56: note: expanded from macro '__do_insb'
> #define __do_insb(p, b, n) readsb((PCI_IO_ADDR)_IO_BASE+(p), (b), (n))
> ~~~~~~~~~~~~~~~~~~~~~^
> In file included from drivers/memory/tegra/tegra30-emc.c:18:
> In file included from include/linux/interrupt.h:11:
> In file included from include/linux/hardirq.h:10:
> In file included from arch/powerpc/include/asm/hardirq.h:6:
> In file included from include/linux/irq.h:20:
> In file included from include/linux/io.h:13:
> In file included from arch/powerpc/include/asm/io.h:619:
> arch/powerpc/include/asm/io-defs.h:45:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
> DEF_PCI_AC_NORET(insw, (unsigned long p, void *b, unsigned long c),
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> arch/powerpc/include/asm/io.h:616:3: note: expanded from macro 'DEF_PCI_AC_NORET'
> __do_##name al; \
> ^~~~~~~~~~~~~~
> <scratch space>:211:1: note: expanded from here
> __do_insw
> ^
> arch/powerpc/include/asm/io.h:557:56: note: expanded from macro '__do_insw'
> #define __do_insw(p, b, n) readsw((PCI_IO_ADDR)_IO_BASE+(p), (b), (n))
> ~~~~~~~~~~~~~~~~~~~~~^
> In file included from drivers/memory/tegra/tegra30-emc.c:18:
> In file included from include/linux/interrupt.h:11:
> In file included from include/linux/hardirq.h:10:
> In file included from arch/powerpc/include/asm/hardirq.h:6:
> In file included from include/linux/irq.h:20:
> In file included from include/linux/io.h:13:
> In file included from arch/powerpc/include/asm/io.h:619:
> arch/powerpc/include/asm/io-defs.h:47:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
> DEF_PCI_AC_NORET(insl, (unsigned long p, void *b, unsigned long c),
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> arch/powerpc/include/asm/io.h:616:3: note: expanded from macro 'DEF_PCI_AC_NORET'
> __do_##name al; \
> ^~~~~~~~~~~~~~
> <scratch space>:213:1: note: expanded from here
> __do_insl
> ^
> arch/powerpc/include/asm/io.h:558:56: note: expanded from macro '__do_insl'
> #define __do_insl(p, b, n) readsl((PCI_IO_ADDR)_IO_BASE+(p), (b), (n))
> ~~~~~~~~~~~~~~~~~~~~~^
> In file included from drivers/memory/tegra/tegra30-emc.c:18:
> In file included from include/linux/interrupt.h:11:
> In file included from include/linux/hardirq.h:10:
> In file included from arch/powerpc/include/asm/hardirq.h:6:
> In file included from include/linux/irq.h:20:
> In file included from include/linux/io.h:13:
> In file included from arch/powerpc/include/asm/io.h:619:
> arch/powerpc/include/asm/io-defs.h:49:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
> DEF_PCI_AC_NORET(outsb, (unsigned long p, const void *b, unsigned long c),
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> arch/powerpc/include/asm/io.h:616:3: note: expanded from macro 'DEF_PCI_AC_NORET'
> __do_##name al; \
> ^~~~~~~~~~~~~~
> <scratch space>:215:1: note: expanded from here
> __do_outsb
> ^
> arch/powerpc/include/asm/io.h:559:58: note: expanded from macro '__do_outsb'
> #define __do_outsb(p, b, n) writesb((PCI_IO_ADDR)_IO_BASE+(p),(b),(n))
> ~~~~~~~~~~~~~~~~~~~~~^
> In file included from drivers/memory/tegra/tegra30-emc.c:18:
> In file included from include/linux/interrupt.h:11:
> In file included from include/linux/hardirq.h:10:
> In file included from arch/powerpc/include/asm/hardirq.h:6:
> In file included from include/linux/irq.h:20:
> In file included from include/linux/io.h:13:
> In file included from arch/powerpc/include/asm/io.h:619:
> arch/powerpc/include/asm/io-defs.h:51:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
> DEF_PCI_AC_NORET(outsw, (unsigned long p, const void *b, unsigned long c),
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> arch/powerpc/include/asm/io.h:616:3: note: expanded from macro 'DEF_PCI_AC_NORET'
> __do_##name al; \
> ^~~~~~~~~~~~~~
> <scratch space>:217:1: note: expanded from here
> __do_outsw
> ^
> arch/powerpc/include/asm/io.h:560:58: note: expanded from macro '__do_outsw'
> #define __do_outsw(p, b, n) writesw((PCI_IO_ADDR)_IO_BASE+(p),(b),(n))
> ~~~~~~~~~~~~~~~~~~~~~^
> In file included from drivers/memory/tegra/tegra30-emc.c:18:
> In file included from include/linux/interrupt.h:11:
> In file included from include/linux/hardirq.h:10:
> In file included from arch/powerpc/include/asm/hardirq.h:6:
> In file included from include/linux/irq.h:20:
> In file included from include/linux/io.h:13:
> In file included from arch/powerpc/include/asm/io.h:619:
> arch/powerpc/include/asm/io-defs.h:53:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
> DEF_PCI_AC_NORET(outsl, (unsigned long p, const void *b, unsigned long c),
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> arch/powerpc/include/asm/io.h:616:3: note: expanded from macro 'DEF_PCI_AC_NORET'
> __do_##name al; \
> ^~~~~~~~~~~~~~
> <scratch space>:219:1: note: expanded from here
> __do_outsl
> ^
> arch/powerpc/include/asm/io.h:561:58: note: expanded from macro '__do_outsl'
> #define __do_outsl(p, b, n) writesl((PCI_IO_ADDR)_IO_BASE+(p),(b),(n))
> ~~~~~~~~~~~~~~~~~~~~~^
>>> drivers/memory/tegra/tegra30-emc.c:757:18: warning: implicit conversion from 'unsigned long' to 'u32' (aka 'unsigned int') changes value from 18446744071562067985 to 2147483665 [-Wconstant-conversion]
> writel_relaxed(EMC_ZQ_CAL_LONG_CMD_DEV0,
> ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
> drivers/memory/tegra/tegra30-emc.c:161:36: note: expanded from macro 'EMC_ZQ_CAL_LONG_CMD_DEV0'
> (DRAM_DEV_SEL_0 | EMC_ZQ_CAL_LONG | EMC_ZQ_CAL_CMD)
> ^
> arch/powerpc/include/asm/io.h:679:40: note: expanded from macro 'writel_relaxed'
> #define writel_relaxed(v, addr) writel(v, addr)
> ~~~~~~ ^
> 13 warnings generated.
> --
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> arch/powerpc/include/asm/io.h:616:3: note: expanded from macro 'DEF_PCI_AC_NORET'
> __do_##name al; \
> ^~~~~~~~~~~~~~
> <scratch space>:203:1: note: expanded from here
> __do_outl
> ^
> arch/powerpc/include/asm/io.h:537:62: note: expanded from macro '__do_outl'
> #define __do_outl(val, port) writel(val,(PCI_IO_ADDR)_IO_BASE+port);
> ~~~~~~~~~~~~~~~~~~~~~^
> In file included from drivers/memory/tegra/tegra124-emc.c:16:
> In file included from include/linux/io.h:13:
> In file included from arch/powerpc/include/asm/io.h:619:
> arch/powerpc/include/asm/io-defs.h:43:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
> DEF_PCI_AC_NORET(insb, (unsigned long p, void *b, unsigned long c),
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> arch/powerpc/include/asm/io.h:616:3: note: expanded from macro 'DEF_PCI_AC_NORET'
> __do_##name al; \
> ^~~~~~~~~~~~~~
> <scratch space>:217:1: note: expanded from here
> __do_insb
> ^
> arch/powerpc/include/asm/io.h:556:56: note: expanded from macro '__do_insb'
> #define __do_insb(p, b, n) readsb((PCI_IO_ADDR)_IO_BASE+(p), (b), (n))
> ~~~~~~~~~~~~~~~~~~~~~^
> In file included from drivers/memory/tegra/tegra124-emc.c:16:
> In file included from include/linux/io.h:13:
> In file included from arch/powerpc/include/asm/io.h:619:
> arch/powerpc/include/asm/io-defs.h:45:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
> DEF_PCI_AC_NORET(insw, (unsigned long p, void *b, unsigned long c),
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> arch/powerpc/include/asm/io.h:616:3: note: expanded from macro 'DEF_PCI_AC_NORET'
> __do_##name al; \
> ^~~~~~~~~~~~~~
> <scratch space>:219:1: note: expanded from here
> __do_insw
> ^
> arch/powerpc/include/asm/io.h:557:56: note: expanded from macro '__do_insw'
> #define __do_insw(p, b, n) readsw((PCI_IO_ADDR)_IO_BASE+(p), (b), (n))
> ~~~~~~~~~~~~~~~~~~~~~^
> In file included from drivers/memory/tegra/tegra124-emc.c:16:
> In file included from include/linux/io.h:13:
> In file included from arch/powerpc/include/asm/io.h:619:
> arch/powerpc/include/asm/io-defs.h:47:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
> DEF_PCI_AC_NORET(insl, (unsigned long p, void *b, unsigned long c),
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> arch/powerpc/include/asm/io.h:616:3: note: expanded from macro 'DEF_PCI_AC_NORET'
> __do_##name al; \
> ^~~~~~~~~~~~~~
> <scratch space>:221:1: note: expanded from here
> __do_insl
> ^
> arch/powerpc/include/asm/io.h:558:56: note: expanded from macro '__do_insl'
> #define __do_insl(p, b, n) readsl((PCI_IO_ADDR)_IO_BASE+(p), (b), (n))
> ~~~~~~~~~~~~~~~~~~~~~^
> In file included from drivers/memory/tegra/tegra124-emc.c:16:
> In file included from include/linux/io.h:13:
> In file included from arch/powerpc/include/asm/io.h:619:
> arch/powerpc/include/asm/io-defs.h:49:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
> DEF_PCI_AC_NORET(outsb, (unsigned long p, const void *b, unsigned long c),
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> arch/powerpc/include/asm/io.h:616:3: note: expanded from macro 'DEF_PCI_AC_NORET'
> __do_##name al; \
> ^~~~~~~~~~~~~~
> <scratch space>:223:1: note: expanded from here
> __do_outsb
> ^
> arch/powerpc/include/asm/io.h:559:58: note: expanded from macro '__do_outsb'
> #define __do_outsb(p, b, n) writesb((PCI_IO_ADDR)_IO_BASE+(p),(b),(n))
> ~~~~~~~~~~~~~~~~~~~~~^
> In file included from drivers/memory/tegra/tegra124-emc.c:16:
> In file included from include/linux/io.h:13:
> In file included from arch/powerpc/include/asm/io.h:619:
> arch/powerpc/include/asm/io-defs.h:51:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
> DEF_PCI_AC_NORET(outsw, (unsigned long p, const void *b, unsigned long c),
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> arch/powerpc/include/asm/io.h:616:3: note: expanded from macro 'DEF_PCI_AC_NORET'
> __do_##name al; \
> ^~~~~~~~~~~~~~
> <scratch space>:225:1: note: expanded from here
> __do_outsw
> ^
> arch/powerpc/include/asm/io.h:560:58: note: expanded from macro '__do_outsw'
> #define __do_outsw(p, b, n) writesw((PCI_IO_ADDR)_IO_BASE+(p),(b),(n))
> ~~~~~~~~~~~~~~~~~~~~~^
> In file included from drivers/memory/tegra/tegra124-emc.c:16:
> In file included from include/linux/io.h:13:
> In file included from arch/powerpc/include/asm/io.h:619:
> arch/powerpc/include/asm/io-defs.h:53:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
> DEF_PCI_AC_NORET(outsl, (unsigned long p, const void *b, unsigned long c),
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> arch/powerpc/include/asm/io.h:616:3: note: expanded from macro 'DEF_PCI_AC_NORET'
> __do_##name al; \
> ^~~~~~~~~~~~~~
> <scratch space>:227:1: note: expanded from here
> __do_outsl
> ^
> arch/powerpc/include/asm/io.h:561:58: note: expanded from macro '__do_outsl'
> #define __do_outsl(p, b, n) writesl((PCI_IO_ADDR)_IO_BASE+(p),(b),(n))
> ~~~~~~~~~~~~~~~~~~~~~^
>>> drivers/memory/tegra/tegra124-emc.c:802:26: warning: implicit conversion from 'unsigned long' to 'u32' (aka 'unsigned int') changes value from 18446744071562067985 to 2147483665 [-Wconstant-conversion]
> emc_ccfifo_writel(emc, EMC_ZQ_CAL_LONG_CMD_DEV0, EMC_ZQ_CAL);
> ~~~~~~~~~~~~~~~~~ ^~~~~~~~~~~~~~~~~~~~~~~~
> drivers/memory/tegra/tegra124-emc.c:154:36: note: expanded from macro 'EMC_ZQ_CAL_LONG_CMD_DEV0'
> (DRAM_DEV_SEL_0 | EMC_ZQ_CAL_LONG | EMC_ZQ_CAL_CMD)
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~
> 13 warnings generated.
This doesn't look like a useful warning from clang, it should see that
the constant value itself isn't truncated, hence it should be a problem
of clang. Do you think it's okay to ignore this nonsense?
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