Re: AZFS file system proposal

[Maxim Shchetynin]

Am Wed, 09 Jul 2008 18:58:38 +1000
schrieb Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>:

> On Tue, 2008-07-01 at 16:59 +0200, Arnd Bergmann wrote:
> > I wouldn't hold up merging the file system for this problem, but
> > until it is solved, the Kconfig entry should probably have
> > a "depends on PPC".
> 
> Better, use an ifdef for powerpc flags, and #else to pgprot_noncached.

Thank you Ben. Then, how about this?

azfs_mmap(struct file *file, struct vm_area_struct *vma)
{
...
...
...
#ifdef CONFIG_PPC
	pgprot_t page_prot;
#endif
...
...
...
#ifdef CONFIG_PPC
	page_prot = pgprot_val(vma->vm_page_prot);
	page_prot |= (_PAGE_NO_CACHE | _PAGE_RW);
	page_prot &= ~_PAGE_GUARDED;
	vma->vm_page_prot = __pgprot(page_prot);
#else
	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
#endif
...
...
...

-- 
Mit freundlichen GrÃÃen / met vriendelijke groeten / avec regards

    Maxim V. Shchetynin
    Linux Kernel Entwicklung
    IBM Deutschland Research & Development GmbH
    Linux fÃr Cell, Abteilung 3250
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