Messages in this thread | | | From | Jeff Moyer <> | Subject | Re: [PATCH 06/10] mm: Add vmf_insert_pfn_pmd() | Date | Mon, 13 Jul 2015 09:23:41 -0400 |
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Matthew Wilcox <matthew.r.wilcox@intel.com> writes:
> +static int insert_pfn_pmd(struct vm_area_struct *vma, unsigned long addr, > + pmd_t *pmd, unsigned long pfn, pgprot_t prot, bool write) > +{ > + struct mm_struct *mm = vma->vm_mm; > + pmd_t entry; > + spinlock_t *ptl; > + > + ptl = pmd_lock(mm, pmd); > + if (pmd_none(*pmd)) { > + entry = pmd_mkhuge(pfn_pmd(pfn, prot)); > + if (write) { > + entry = pmd_mkyoung(pmd_mkdirty(entry)); > + entry = maybe_pmd_mkwrite(entry, vma); > + } > + set_pmd_at(mm, addr, pmd, entry); > + update_mmu_cache_pmd(vma, addr, pmd); > + } > + spin_unlock(ptl); > + return VM_FAULT_NOPAGE; > +}
What's the point of the return value?
Cheers, Jeff
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