Messages in this thread | | | Date | Sat, 28 Jan 2017 09:38:22 +0100 | From | Ingo Molnar <> | Subject | Re: [PATCH] x86: Improve documentation for low-level device I/O functions |
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* Jonathan Corbet <corbet@lwn.net> wrote:
> Add kerneldoc comments for memcpy_{to,from}io() and memset_io(). The > existing documentation for ioremap() was distant from the definition, > causing kernel-doc to miss it; move it appropriately. > > Signed-off-by: Jonathan Corbet <corbet@lwn.net> > --- > arch/x86/include/asm/io.h | 47 ++++++++++++++++++++++++++++++++++++----------- > 1 file changed, 36 insertions(+), 11 deletions(-) > > diff --git a/arch/x86/include/asm/io.h b/arch/x86/include/asm/io.h > index d34bd370074b..a8a6c856a08f 100644 > --- a/arch/x86/include/asm/io.h > +++ b/arch/x86/include/asm/io.h > @@ -164,6 +164,18 @@ static inline unsigned int isa_virt_to_bus(volatile void *address) > #define virt_to_bus virt_to_phys > #define bus_to_virt phys_to_virt > > +/* > + * The default ioremap() behavior is non-cached; if you need something > + * else, you probably want one of the following. > + */ > +extern void __iomem *ioremap_nocache(resource_size_t offset, unsigned long size); > +extern void __iomem *ioremap_uc(resource_size_t offset, unsigned long size); > +#define ioremap_uc ioremap_uc > + > +extern void __iomem *ioremap_cache(resource_size_t offset, unsigned long size); > +extern void __iomem *ioremap_prot(resource_size_t offset, unsigned long size, > + unsigned long prot_val); > + > /** > * ioremap - map bus memory into CPU space > * @offset: bus address of the memory > @@ -178,17 +190,6 @@ static inline unsigned int isa_virt_to_bus(volatile void *address) > * If the area you are trying to map is a PCI BAR you should have a > * look at pci_iomap(). > */ > -extern void __iomem *ioremap_nocache(resource_size_t offset, unsigned long size); > -extern void __iomem *ioremap_uc(resource_size_t offset, unsigned long size); > -#define ioremap_uc ioremap_uc > - > -extern void __iomem *ioremap_cache(resource_size_t offset, unsigned long size); > -extern void __iomem *ioremap_prot(resource_size_t offset, unsigned long size, > - unsigned long prot_val); > - > -/* > - * The default ioremap() behavior is non-cached: > - */ > static inline void __iomem *ioremap(resource_size_t offset, unsigned long size) > { > return ioremap_nocache(offset, size); > @@ -207,18 +208,42 @@ extern void set_iounmap_nonlazy(void); > */ > #define xlate_dev_kmem_ptr(p) p > > +/** > + * memset_io Set a range of I/O memory to a constant value > + * @addr: The beginning of the I/O-memory range to set > + * @val: The value to set the memory to > + * @count: The number of bytest to set
I fixed this 'bytest' typo and applied the patch, thanks Jon!
Thanks,
Ingo
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