Re: [RESEND PATCH] powerpc/powernv: Fix vma page prot flags in opal-prd driver

2015-06-28 Thread Jeremy Kerr
Hi Vaidy, > opal-prd driver will mmap() firmware code/data area as private > mapping to prd user space daemon. Write to this page will > trigger COW faults. The new COW pages are normal kernel RAM > pages accounted by the kernel and are not special. > > vma->vm_page_prot value will be used at p

[RESEND PATCH] powerpc/powernv: Fix vma page prot flags in opal-prd driver

2015-06-28 Thread Vaidyanathan Srinivasan
opal-prd driver will mmap() firmware code/data area as private mapping to prd user space daemon. Write to this page will trigger COW faults. The new COW pages are normal kernel RAM pages accounted by the kernel and are not special. vma->vm_page_prot value will be used at page fault time for the