On 11/27/23 at 05:55pm, David E. Box wrote: > +Baoquan for ioremap question. > > On Thu, 2023-11-23 at 16:30 +0200, Ilpo Järvinen wrote: > > On Wed, 22 Nov 2023, David E. Box wrote: > > > > > Add auto-release cleanups for iounmap() and ioport_unmap(). > > > > > > Signed-off-by: David E. Box <david.e.box@xxxxxxxxxxxxxxx> > > > Suggested-by: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx> > > > --- > > > V2 - Move from linux/io.h to asm-generic/io.h. Adds iounmap cleanup if > > > iounmap() is defined. Adds ioport_unmap cleanup if CONFIG_IOPORT_MAP > > > is defined. > > > > > > include/asm-generic/io.h | 6 ++++++ > > > 1 file changed, 6 insertions(+) > > > > > > diff --git a/include/asm-generic/io.h b/include/asm-generic/io.h > > > index bac63e874c7b..9ef0332490b1 100644 > > > --- a/include/asm-generic/io.h > > > +++ b/include/asm-generic/io.h > > > @@ -8,6 +8,7 @@ > > > #define __ASM_GENERIC_IO_H > > > > > > #include <asm/page.h> /* I/O is all done through memory accesses */ > > > +#include <linux/cleanup.h> > > > #include <linux/string.h> /* for memset() and memcpy() */ > > > #include <linux/types.h> > > > #include <linux/instruction_pointer.h> > > > @@ -1065,6 +1066,10 @@ static inline void __iomem *ioremap(phys_addr_t addr, > > > size_t size) > > > #endif > > > #endif /* !CONFIG_MMU || CONFIG_GENERIC_IOREMAP */ > > > > > > +#ifdef iounmap > > > +DEFINE_FREE(iounmap, void __iomem *, iounmap(_T)); > > > +#endif > > Baoquan, LKP is reporting an undeclared function 'iounmap' error with the above > change from this patch when building for s390 with PCI disabled. The ioremap > defines in arch/s390/include/asm/io.h are not wrapped under the #ifdef > CONFIG_PCI block. Shouldn't they be since the s390 Kconfig only adds > GENERIC_IOREMAP if PCI? Sorry, almost forget this mail. Will check and reply later. > > https://lore.kernel.org/oe-kbuild-all/202311241214.jcL84du7-lkp@xxxxxxxxx > > > Note that the report includes pointer arithmetic warnings that are not related > to this patch. Those warnings occur in mainline as well. > > David > > > > + > > > #ifndef ioremap_wc > > > #define ioremap_wc ioremap > > > #endif > > > @@ -1127,6 +1132,7 @@ static inline void ioport_unmap(void __iomem *p) > > > extern void __iomem *ioport_map(unsigned long port, unsigned int nr); > > > extern void ioport_unmap(void __iomem *p); > > > #endif /* CONFIG_GENERIC_IOMAP */ > > > +DEFINE_FREE(ioport_unmap, void __iomem *, ioport_unmap(_T)); > > > #endif /* CONFIG_HAS_IOPORT_MAP */ > > > > > > #ifndef CONFIG_GENERIC_IOMAP > > > > Has this now built successfully with LKP? (I don't think we get success > > notifications from LKP for patch submissions, only failures). > > > > There were some odd errors last time but I think all they were unrelated > > to this change (besides the checkpatch false positive, I mean). > > >
