Re: [PATCH] mm/gup: fix gup_fast with dynamic page table folding
From: Jason Gunthorpe <jgg@ziepe.ca>
Date: 2020-09-11 19:40:10
Also in:
linux-arch, linux-arm-kernel, linux-mm, linux-s390, linux-um, lkml, sparclinux
On Fri, Sep 11, 2020 at 09:03:06PM +0200, Vasily Gorbik wrote:
quoted hunk ↗ jump to hunk
diff --git a/include/linux/pgtable.h b/include/linux/pgtable.h index e8cbc2e795d5..e899d3506671 100644 +++ b/include/linux/pgtable.h@@ -1427,6 +1427,16 @@ typedef unsigned int pgtbl_mod_mask; #define mm_pmd_folded(mm) __is_defined(__PAGETABLE_PMD_FOLDED) #endif +#ifndef p4d_offset_lockless +#define p4d_offset_lockless(pgdp, pgd, address) p4d_offset(&pgd, address) +#endif +#ifndef pud_offset_lockless +#define pud_offset_lockless(p4dp, p4d, address) pud_offset(&p4d, address) +#endif +#ifndef pmd_offset_lockless +#define pmd_offset_lockless(pudp, pud, address) pmd_offset(&pud, address)
Needs brackets: &(pgd) These would probably be better as static inlines though, as only s390 compiles will type check pudp like this. Jason