mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-09-05 18:39:59 +00:00
Code Issues Releases Wiki Activity

parisc: Update huge TLB page support to use per-pagetable spinlock

Browse source 
This patch updates the parisc huge TLB page support to use per-pagetable spinlocks.

This patch requires Mikulas' per-pagetable spinlock patch and the revised TLB
serialization patch from Helge and myself.  With Mikulas' patch, we need to use
the per-pagetable spinlock for page table updates.  The TLB lock is only used
to serialize TLB flushes on machines with the Merced bus.

Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
John David Anglin 2019-04-27 14:15:38 -04:00 committed by Helge Deller
parent b37d1c1898
commit 11c03dc85f
1 changed files with 10 additions and 9 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

19
arch/parisc/mm/hugetlbpage.c
View file

@ -139,9 +139,9 @@ void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
{
unsigned long flags;
purge_tlb_start(flags);
spin_lock_irqsave(pgd_spinlock((mm)->pgd), flags);
__set_huge_pte_at(mm, addr, ptep, entry);
purge_tlb_end(flags);
spin_unlock_irqrestore(pgd_spinlock((mm)->pgd), flags);
}
@ -151,10 +151,10 @@ pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
unsigned long flags;
pte_t entry;
purge_tlb_start(flags);
spin_lock_irqsave(pgd_spinlock((mm)->pgd), flags);
entry = *ptep;
__set_huge_pte_at(mm, addr, ptep, __pte(0));
purge_tlb_end(flags);
spin_unlock_irqrestore(pgd_spinlock((mm)->pgd), flags);
return entry;
}
@ -166,10 +166,10 @@ void huge_ptep_set_wrprotect(struct mm_struct *mm,
unsigned long flags;
pte_t old_pte;
purge_tlb_start(flags);
spin_lock_irqsave(pgd_spinlock((mm)->pgd), flags);
old_pte = *ptep;
__set_huge_pte_at(mm, addr, ptep, pte_wrprotect(old_pte));
purge_tlb_end(flags);
spin_unlock_irqrestore(pgd_spinlock((mm)->pgd), flags);
}
int huge_ptep_set_access_flags(struct vm_area_struct *vma,
@ -178,13 +178,14 @@ int huge_ptep_set_access_flags(struct vm_area_struct *vma,
{
unsigned long flags;
int changed;
struct mm_struct *mm = vma->vm_mm;
purge_tlb_start(flags);
spin_lock_irqsave(pgd_spinlock((mm)->pgd), flags);
changed = !pte_same(*ptep, pte);
if (changed) {
__set_huge_pte_at(vma->vm_mm, addr, ptep, pte);
__set_huge_pte_at(mm, addr, ptep, pte);
}
purge_tlb_end(flags);
spin_unlock_irqrestore(pgd_spinlock((mm)->pgd), flags);
return changed;
}