diff options
| author | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2021-08-05 16:28:43 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2021-08-05 16:28:43 +0200 |
| commit | 9c3a0f285248899dfa81585bc5d5bc9ebdb8fead (patch) | |
| tree | 908decd51fbb0e1c774444b002e3b89dee3fae26 /mm/memory.c | |
| parent | bfee75f73c37a2f46a6326eaa06f5db701f76f01 (diff) | |
| parent | c500bee1c5b2f1d59b1081ac879d73268ab0ff17 (diff) | |
Merge tag 'v5.14-rc4' into media_tree
Linux 5.14-rc4
* tag 'v5.14-rc4': (948 commits)
Linux 5.14-rc4
pipe: make pipe writes always wake up readers
Revert "perf map: Fix dso->nsinfo refcounting"
mm/memcg: fix NULL pointer dereference in memcg_slab_free_hook()
slub: fix unreclaimable slab stat for bulk free
mm/migrate: fix NR_ISOLATED corruption on 64-bit
mm: memcontrol: fix blocking rstat function called from atomic cgroup1 thresholding code
ocfs2: issue zeroout to EOF blocks
ocfs2: fix zero out valid data
lib/test_string.c: move string selftest in the Runtime Testing menu
gve: Update MAINTAINERS list
arch: Kconfig: clean up obsolete use of HAVE_IDE
can: esd_usb2: fix memory leak
can: ems_usb: fix memory leak
can: usb_8dev: fix memory leak
can: mcba_usb_start(): add missing urb->transfer_dma initialization
can: hi311x: fix a signedness bug in hi3110_cmd()
MAINTAINERS: add Yasushi SHOJI as reviewer for the Microchip CAN BUS Analyzer Tool driver
scsi: fas216: Fix fall-through warning for Clang
scsi: acornscsi: Fix fall-through warning for clang
...
Diffstat (limited to 'mm/memory.c')
| -rw-r--r-- | mm/memory.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/mm/memory.c b/mm/memory.c index 747a01d495f2..25fc46e87214 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -4026,8 +4026,17 @@ vm_fault_t finish_fault(struct vm_fault *vmf) return ret; } - if (unlikely(pte_alloc(vma->vm_mm, vmf->pmd))) + if (vmf->prealloc_pte) { + vmf->ptl = pmd_lock(vma->vm_mm, vmf->pmd); + if (likely(pmd_none(*vmf->pmd))) { + mm_inc_nr_ptes(vma->vm_mm); + pmd_populate(vma->vm_mm, vmf->pmd, vmf->prealloc_pte); + vmf->prealloc_pte = NULL; + } + spin_unlock(vmf->ptl); + } else if (unlikely(pte_alloc(vma->vm_mm, vmf->pmd))) { return VM_FAULT_OOM; + } } /* See comment in handle_pte_fault() */ |