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mm: mmu_gather: do not expose delayed_rmap flag 

Flag delayed_rmap of 'struct mmu_gather' is rather a private member, but
it is still accessed directly.  Instead, let the TLB gather code access
the flag.

Link: https://lkml.kernel.org/r/Y3SWCu6NRaMQ5dbD@li-4a3a4a4c-28e5-11b2-a85c-a8d192c6f089.ibm.com
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Alexander Gordeev 2022-11-16 08:49:30 +01:00 committed by Andrew Morton
parent 5df397dec7
commit f036c8184f
2 changed files with 4 additions and 2 deletions
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3
mm/memory.c
View File

@ -1465,8 +1465,7 @@ again:
/* Do the actual TLB flush before dropping ptl */ /* Do the actual TLB flush before dropping ptl */
if (force_flush) { if (force_flush) {
tlb_flush_mmu_tlbonly(tlb); tlb_flush_mmu_tlbonly(tlb);
if (tlb->delayed_rmap) tlb_flush_rmaps(tlb, vma);
tlb_flush_rmaps(tlb, vma);
} }
pte_unmap_unlock(start_pte, ptl); pte_unmap_unlock(start_pte, ptl);

3
mm/mmu_gather.c
View File

@ -61,6 +61,9 @@ void tlb_flush_rmaps(struct mmu_gather *tlb, struct vm_area_struct *vma)
{ {
struct mmu_gather_batch *batch; struct mmu_gather_batch *batch;
if (!tlb->delayed_rmap)
return;
batch = tlb->active; batch = tlb->active;
for (int i = 0; i < batch->nr; i++) { for (int i = 0; i < batch->nr; i++) {
struct encoded_page *enc = batch->encoded_pages[i]; struct encoded_page *enc = batch->encoded_pages[i];