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dax: Allow dax_iomap_fault() to return pfn

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For synchronous page fault dax_iomap_fault() will need to return PFN
which will then need to be inserted into page tables after fsync()
completes. Add necessary parameter to dax_iomap_fault().

Reviewed-by: Christoph Hellwig <[email protected]>
Reviewed-by: Ross Zwisler <[email protected]>
Signed-off-by: Jan Kara <[email protected]>
Signed-off-by: Dan Williams <[email protected]>
This commit is contained in:
Jan Kara 2017-11-01 16:36:39 +01:00 • committed by Dan Williams
commit 9a0dd42251
5 changed files with 12 additions and 11 deletions
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2
fs/ext4/file.c
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@ -306,7 +306,7 @@ static int ext4_dax_huge_fault(struct vm_fault *vmf,
down_read(&EXT4_I(inode)->i_mmap_sem);
}
if (!IS_ERR(handle))
result = dax_iomap_fault(vmf, pe_size, &ext4_iomap_ops);
result = dax_iomap_fault(vmf, pe_size, NULL, &ext4_iomap_ops);
else
result = VM_FAULT_SIGBUS;
if (write) {