Evolution-X-Devices/kernel_xiaomi_garnet
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Merge 952596b08c ("mm/hugetlb: fix huge_pmd_unshare() vs GUP-fast race") into android12-5.10-lts

Browse Source 
Steps on the way to 5.10.239

Change-Id: I21d6c348003b1f188a9cf0276d24966b0871527f
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Greg Kroah-Hartman
2025-07-11 10:11:20 +00:00
parent 38afe12e2e 952596b08c
commit 8466774364
1 changed files with 7 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
mm/hugetlb.c
View File

@@ -5526,6 +5526,13 @@ int huge_pmd_unshare(struct mm_struct *mm, struct vm_area_struct *vma,
return 0;
pud_clear(pud);
/*
* Once our caller drops the rmap lock, some other process might be
* using this page table as a normal, non-hugetlb page table.
* Wait for pending gup_fast() in other threads to finish before letting
* that happen.
*/
tlb_remove_table_sync_one();
put_page(virt_to_page(ptep));
mm_dec_nr_pmds(mm);
/*