Re: flush_kernel_vmap_range() invalidate_kernel_vmap_range() API not exists for MIPS

[Sergei Shtylyov <sshtylyov@mvista.com>]

Hello.

On 17-06-2011 19:20, Ralf Baechle wrote:

> > Ralf,
> > I'll second that request.  We'll really need this, right now embedded XFS
> > users are hacking around it in horrible ways.
> Here's my shot at the problem.  I don't have the time to setup a XFS
> filesystem and tools for testing before the weekend so all I claim is this
> patch builds for R4000-class CPUs but it should be pretty close to the
> real thing.
> Naveen, can you give this patch a spin?  Thanks!
>    Ralf
> Signed-off-by: Ralf Baechle<ralf@linux-mips.org>
[...]

> diff --git a/arch/mips/include/asm/cacheflush.h 
> b/arch/mips/include/asm/cacheflush.h
> index 40bb9fd..69468de 100644
> --- a/arch/mips/include/asm/cacheflush.h
> +++ b/arch/mips/include/asm/cacheflush.h
> @@ -114,4 +114,28 @@ unsigned long run_uncached(void *func);
>   extern void *kmap_coherent(struct page *page, unsigned long addr);
>   extern void kunmap_coherent(void);
>
> +#define ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE
> +static inline void flush_kernel_dcache_page(struct page *page)
> +{
> +       BUG_ON(cpu_has_dc_aliases&&  PageHighMem(page));
> +}
> +
> +/*
> + * For now flush_kernel_vmap_range and invalidate_kernel_vmap_range both do a
> + * cache writeback and invalidate operation.
> + */
> +extern void (*__flush_kernel_vmap_range)(unsigned long vaddr, int size);
> +
> +static inline void flush_kernel_vmap_range(void *vaddr, int size)
> +{
> +       if (cpu_has_dc_aliases)
> +               __flush_kernel_vmap_range((unsigned long) vaddr, size);
> +}
> +
> +static inline void invalidate_kernel_vmap_range(void *vaddr, int size)
> +{
> +       if (cpu_has_dc_aliases)
> +               __flush_kernel_vmap_range((unsigned long) vaddr, size);
   Not __invalidate_kernel_vmap_range()?

WBR, Sergei