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| author | Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2017-03-09 17:24:07 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-03-09 11:48:47 -0800 |
| commit | c2febafc67734a62196c1b9dfba926412d4077ba (patch) | |
| tree | a61b7cd503e4c6d2fbb58f0cb53662ffd60b4c14 /mm/mprotect.c | |
| parent | 048456dcf2c56ad6f6248e2899dda92fb6a613f6 (diff) | |
| download | lwn-c2febafc67734a62196c1b9dfba926412d4077ba.tar.gz lwn-c2febafc67734a62196c1b9dfba926412d4077ba.zip | |
mm: convert generic code to 5-level paging
Convert all non-architecture-specific code to 5-level paging.
It's mostly mechanical adding handling one more page table level in
places where we deal with pud_t.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/mprotect.c')
| -rw-r--r-- | mm/mprotect.c | 26 |
1 files changed, 23 insertions, 3 deletions
diff --git a/mm/mprotect.c b/mm/mprotect.c index 848e946b08e5..8edd0d576254 100644 --- a/mm/mprotect.c +++ b/mm/mprotect.c @@ -193,14 +193,14 @@ static inline unsigned long change_pmd_range(struct vm_area_struct *vma, } static inline unsigned long change_pud_range(struct vm_area_struct *vma, - pgd_t *pgd, unsigned long addr, unsigned long end, + p4d_t *p4d, unsigned long addr, unsigned long end, pgprot_t newprot, int dirty_accountable, int prot_numa) { pud_t *pud; unsigned long next; unsigned long pages = 0; - pud = pud_offset(pgd, addr); + pud = pud_offset(p4d, addr); do { next = pud_addr_end(addr, end); if (pud_none_or_clear_bad(pud)) @@ -212,6 +212,26 @@ static inline unsigned long change_pud_range(struct vm_area_struct *vma, return pages; } +static inline unsigned long change_p4d_range(struct vm_area_struct *vma, + pgd_t *pgd, unsigned long addr, unsigned long end, + pgprot_t newprot, int dirty_accountable, int prot_numa) +{ + p4d_t *p4d; + unsigned long next; + unsigned long pages = 0; + + p4d = p4d_offset(pgd, addr); + do { + next = p4d_addr_end(addr, end); + if (p4d_none_or_clear_bad(p4d)) + continue; + pages += change_pud_range(vma, p4d, addr, next, newprot, + dirty_accountable, prot_numa); + } while (p4d++, addr = next, addr != end); + + return pages; +} + static unsigned long change_protection_range(struct vm_area_struct *vma, unsigned long addr, unsigned long end, pgprot_t newprot, int dirty_accountable, int prot_numa) @@ -230,7 +250,7 @@ static unsigned long change_protection_range(struct vm_area_struct *vma, next = pgd_addr_end(addr, end); if (pgd_none_or_clear_bad(pgd)) continue; - pages += change_pud_range(vma, pgd, addr, next, newprot, + pages += change_p4d_range(vma, pgd, addr, next, newprot, dirty_accountable, prot_numa); } while (pgd++, addr = next, addr != end); |