Re: [PATCH v6 02/19] hexagon: mm: Convert to GENERIC_IOREMAP

From: Nathan Chancellor
Date: Mon Jun 12 2023 - 12:02:47 EST

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In reply to: Baoquan He: "Re: [PATCH v6 02/19] hexagon: mm: Convert to GENERIC_IOREMAP"
Next in thread: Baoquan He: "[PATCH v6 04/19] mm/ioremap: Define generic_ioremap_prot() and generic_iounmap()"
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On Sun, Jun 11, 2023 at 03:57:32PM +0800, Baoquan He wrote:
> On 06/11/23 at 08:40am, Mike Rapoport wrote:
> > Hi Baoquan,
> >
> > On Sat, Jun 10, 2023 at 04:26:21PM +0800, Baoquan He wrote:
> > > On 06/09/23 at 07:09pm, kernel test robot wrote:
> > > > Hi Baoquan,
> > > >
> > > > kernel test robot noticed the following build errors:
> > > >
> > > > [auto build test ERROR on akpm-mm/mm-everything]
> > > >
> > > > url: https://github.com/intel-lab-lkp/linux/commits/Baoquan-He/asm-generic-iomap-h-remove-ARCH_HAS_IOREMAP_xx-macros/20230609-160014
> > > > base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
> > > > patch link: https://lore.kernel.org/r/20230609075528.9390-3-bhe%40redhat.com
> > > > patch subject: [PATCH v6 02/19] hexagon: mm: Convert to GENERIC_IOREMAP
> > > > config: hexagon-randconfig-r041-20230608 (https://download.01.org/0day-ci/archive/20230609/202306091859.NhlW2nny-lkp@xxxxxxxxx/config)
> > > > compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a)
> > > > reproduce (this is a W=1 build):
> > > > mkdir -p ~/bin
> > > > wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
> > > > chmod +x ~/bin/make.cross
> > > > git remote add akpm-mm https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git
> > > > git fetch akpm-mm mm-everything
> > > > git checkout akpm-mm/mm-everything
> > > > b4 shazam https://lore.kernel.org/r/20230609075528.9390-3-bhe@xxxxxxxxxx
> > > > # save the config file
> > > > mkdir build_dir && cp config build_dir/.config
> > > > COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang ~/bin/make.cross W=1 O=build_dir ARCH=hexagon olddefconfig
> > > > COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang ~/bin/make.cross W=1 O=build_dir ARCH=hexagon prepare
> > > >
> > > > 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@xxxxxxxxx>
> > > > | Closes: https://lore.kernel.org/oe-kbuild-all/202306091859.NhlW2nny-lkp@xxxxxxxxx/
> > >
> > > Thanks for reporting. I reproduced them on my local machine. Below patch
> > > can fix them. And by the way, I also saw the clone3 warning, and have to
> > > made change in scripts/checksyscalls.sh to mute it, wondering how you
> > > handle it in your testing.
> >
> > I think the warning kbuild reported is rather this one:
> >
> > >> include/asm-generic/io.h:1078:6: error: conflicting types for 'iounmap'
> > 1078 | void iounmap(volatile void __iomem *addr);
> > | ^
>
> This one is reported as error. The old iounmap() declaration has a const,
> while the standard one doesn't have. So I just remove the old one to use
> the standard one.
>
> Another one is warning about PCI_IOBASE. Because inb/w/l and outb/w/l is
> redefined in asm-generic/io.h, and it uses PCI_IOBASE which is defniend
> as NULL in asm-generic/io.h if ARCH doesn't have its own PCI_IOBASE
> definition. Then the warning is triggered. So I define macro to override
> the standard inb/w/l and outb/w/l.
>
> #ifndef PCI_IOBASE
> #define PCI_IOBASE ((void __iomem *)0)
> #endif

I believe that this series [1] by Niklas Schnelle should take care of
the PCI_IOBASE warnings (which are not Hexagon specific), so there is no
need to worry about them when they show up in build reports.

[1]: https://lore.kernel.org/20230522105049.1467313-1-schnelle@xxxxxxxxxxxxx/

Cheers,
Nathan

> > > stdin>:1520:2: warning: syscall clone3 not implemented [-W#warnings]
> > > 1520 | #warning syscall clone3 not implemented
> > > | ^
> > > 1 warning generated.
> > >
> > > ------
> > > diff --git a/scripts/checksyscalls.sh b/scripts/checksyscalls.sh
> > > index 1e5d2eeb726d..3a369b78edb7 100755
> > > --- a/scripts/checksyscalls.sh
> > > +++ b/scripts/checksyscalls.sh
> > > @@ -148,6 +148,7 @@ cat << EOF
> > > #define __IGNORE_nanosleep
> > > #define __IGNORE_io_getevents
> > > #define __IGNORE_recvmmsg
> > > +#define __IGNORE_clone3
> > > #endif
> > >
> > >
> > > From 6a86f4360a61a2b7b4d71172e5c03be554367553 Mon Sep 17 00:00:00 2001
> > > From: root <root@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
> > > Date: Fri, 9 Jun 2023 21:21:36 -0400
> > > Subject: [PATCH] hexagon: mm: fix warning in asm/io.h
> > > Content-type: text/plain
> > >
> > > Remove the old iounmap() declaration which is not consistent with the
> > > standard one in asm-generic/io.h, let's use the standard one.
> > >
> > > And also add macro definition of inb/w/l and outb/w/l to override
> > > the definition of them in asm-generic/io.h.
> > >
> > > Reported-by: kernel test robot <lkp@xxxxxxxxx>
> > > Signed-off-by: Baoquan He <bhe@xxxxxxxxxx>
> > > ---
> > > arch/hexagon/include/asm/io.h | 8 ++++++--
> > > scripts/checksyscalls.sh | 1 +
> > > 2 files changed, 7 insertions(+), 2 deletions(-)
> > >
> > > diff --git a/arch/hexagon/include/asm/io.h b/arch/hexagon/include/asm/io.h
> > > index dcd9cbbf5934..efe9cb00ebf8 100644
> > > --- a/arch/hexagon/include/asm/io.h
> > > +++ b/arch/hexagon/include/asm/io.h
> > > @@ -27,8 +27,6 @@
> > > extern int remap_area_pages(unsigned long start, unsigned long phys_addr,
> > > unsigned long end, unsigned long flags);
> > >
> > > -extern void iounmap(const volatile void __iomem *addr);
> > > -
> > > /* Defined in lib/io.c, needed for smc91x driver. */
> > > extern void __raw_readsw(const void __iomem *addr, void *data, int wordlen);
> > > extern void __raw_writesw(void __iomem *addr, const void *data, int wordlen);
> > > @@ -207,16 +205,19 @@ static inline void memset_io(volatile void __iomem *addr, int value,
> > > *
> > > * Operates on "I/O bus I/O space"
> > > */
> > > +#define inb inb
> > > static inline u8 inb(unsigned long port)
> > > {
> > > return readb(_IO_BASE + (port & IO_SPACE_LIMIT));
> > > }
> > >
> > > +#define inw inw
> > > static inline u16 inw(unsigned long port)
> > > {
> > > return readw(_IO_BASE + (port & IO_SPACE_LIMIT));
> > > }
> > >
> > > +#define inl inl
> > > static inline u32 inl(unsigned long port)
> > > {
> > > return readl(_IO_BASE + (port & IO_SPACE_LIMIT));
> > > @@ -227,16 +228,19 @@ static inline u32 inl(unsigned long port)
> > > * @data: data to write to
> > > * @addr: address in I/O space
> > > */
> > > +#define outb outb
> > > static inline void outb(u8 data, unsigned long port)
> > > {
> > > writeb(data, _IO_BASE + (port & IO_SPACE_LIMIT));
> > > }
> > >
> > > +#define outw outw
> > > static inline void outw(u16 data, unsigned long port)
> > > {
> > > writew(data, _IO_BASE + (port & IO_SPACE_LIMIT));
> > > }
> > >
> > > +#define outl outl
> > > static inline void outl(u32 data, unsigned long port)
> > > {
> > > writel(data, _IO_BASE + (port & IO_SPACE_LIMIT));
> > >
> >
> > --
> > Sincerely yours,
> > Mike.
> >
>
>

Next message: Maxime Ripard: "Re: [PATCH v2 00/10] drm/panel and i2c-hid: Allow panels and touchscreens to power sequence together"
Previous message: Kubalewski, Arkadiusz: "RE: [RFC PATCH v8 01/10] dpll: documentation on DPLL subsystem interface"
In reply to: Baoquan He: "Re: [PATCH v6 02/19] hexagon: mm: Convert to GENERIC_IOREMAP"
Next in thread: Baoquan He: "[PATCH v6 04/19] mm/ioremap: Define generic_ioremap_prot() and generic_iounmap()"
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