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| author | David S. Miller <davem@davemloft.net> | 2015-10-02 17:21:25 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-10-02 17:21:25 +0300 |
| commit | f6d3125fa3c2f55ddf7cf69365c41089de6cfae6 (patch) | |
| tree | ff2bcb135ebf090d7b383d55123b621f4590632c /fs/dax.c | |
| parent | 2dc6a0303b89de4c92b44f5278d61b6b6c9c20eb (diff) | |
| parent | 36f8dafe52b0d0726edd5102900e37192f1d3c65 (diff) | |
| download | linux-f6d3125fa3c2f55ddf7cf69365c41089de6cfae6.tar.xz | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts:
net/dsa/slave.c
net/dsa/slave.c simply had overlapping changes.
Signed-off-by: David S. Miller <davem@davemloft.net>
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) { |