diff options
| author | Thomas Gleixner | 2015-10-13 19:00:14 +0200 |
|---|---|---|
| committer | Thomas Gleixner | 2015-10-13 19:00:14 +0200 |
| commit | e50226b4b86755e65aef2129e94d952fee3df722 (patch) | |
| tree | d4dd925fc7f5c6fe46b647c8027911190595f014 /fs/dax.c | |
| parent | genirq: Add flag to force mask in disable_irq[_nosync]() (diff) | |
| parent | Linux 4.3-rc5 (diff) | |
| download | kernel-qcow2-linux-e50226b4b86755e65aef2129e94d952fee3df722.tar.gz kernel-qcow2-linux-e50226b4b86755e65aef2129e94d952fee3df722.tar.xz kernel-qcow2-linux-e50226b4b86755e65aef2129e94d952fee3df722.zip | |
Merge branch 'linus' into irq/core
Bring in upstream updates for patches which depend on them
Diffstat (limited to 'fs/dax.c')
| -rw-r--r-- | fs/dax.c | 13 |
1 files changed, 12 insertions, 1 deletions
@@ -569,8 +569,20 @@ int __dax_pmd_fault(struct vm_area_struct *vma, unsigned long address, if (!buffer_size_valid(&bh) || bh.b_size < PMD_SIZE) goto fallback; + sector = bh.b_blocknr << (blkbits - 9); + if (buffer_unwritten(&bh) || buffer_new(&bh)) { int i; + + length = bdev_direct_access(bh.b_bdev, sector, &kaddr, &pfn, + bh.b_size); + if (length < 0) { + result = VM_FAULT_SIGBUS; + goto out; + } + if ((length < PMD_SIZE) || (pfn & PG_PMD_COLOUR)) + goto fallback; + for (i = 0; i < PTRS_PER_PMD; i++) clear_pmem(kaddr + i * PAGE_SIZE, PAGE_SIZE); wmb_pmem(); @@ -623,7 +635,6 @@ int __dax_pmd_fault(struct vm_area_struct *vma, unsigned long address, result = VM_FAULT_NOPAGE; spin_unlock(ptl); } else { - sector = bh.b_blocknr << (blkbits - 9); length = bdev_direct_access(bh.b_bdev, sector, &kaddr, &pfn, bh.b_size); if (length < 0) { |