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-rw-r--r--fs/dax.c46
1 files changed, 19 insertions, 27 deletions
diff --git a/fs/dax.c b/fs/dax.c
index 5ea71381dba0..5b20c6456926 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -858,32 +858,6 @@ out:
return rc;
}
-static int dax_insert_mapping(struct vm_fault *vmf, struct iomap *iomap,
- loff_t pos, void *entry)
-{
- const sector_t sector = dax_iomap_sector(iomap, pos);
- struct vm_area_struct *vma = vmf->vma;
- struct address_space *mapping = vma->vm_file->f_mapping;
- unsigned long vaddr = vmf->address;
- void *ret;
- int rc;
- pfn_t pfn;
-
- rc = dax_iomap_pfn(iomap, pos, PAGE_SIZE, &pfn);
- if (rc < 0)
- return rc;
-
- ret = dax_insert_mapping_entry(mapping, vmf, entry, sector, 0);
- if (IS_ERR(ret))
- return PTR_ERR(ret);
-
- trace_dax_insert_mapping(mapping->host, vmf, ret);
- if (vmf->flags & FAULT_FLAG_WRITE)
- return vm_insert_mixed_mkwrite(vma, vaddr, pfn);
- else
- return vm_insert_mixed(vma, vaddr, pfn);
-}
-
/*
* The user has performed a load from a hole in the file. Allocating a new
* page in the file would cause excessive storage usage for workloads with
@@ -1119,6 +1093,7 @@ static int dax_iomap_pte_fault(struct vm_fault *vmf,
bool write = vmf->flags & FAULT_FLAG_WRITE;
int vmf_ret = 0;
void *entry;
+ pfn_t pfn;
trace_dax_pte_fault(inode, vmf, vmf_ret);
/*
@@ -1201,7 +1176,24 @@ static int dax_iomap_pte_fault(struct vm_fault *vmf,
count_memcg_event_mm(vma->vm_mm, PGMAJFAULT);
major = VM_FAULT_MAJOR;
}
- error = dax_insert_mapping(vmf, &iomap, pos, entry);
+ error = dax_iomap_pfn(&iomap, pos, PAGE_SIZE, &pfn);
+ if (error < 0)
+ goto error_finish_iomap;
+
+ entry = dax_insert_mapping_entry(mapping, vmf, entry,
+ dax_iomap_sector(&iomap, pos),
+ 0);
+ if (IS_ERR(entry)) {
+ error = PTR_ERR(entry);
+ goto error_finish_iomap;
+ }
+
+ trace_dax_insert_mapping(inode, vmf, entry);
+ if (write)
+ error = vm_insert_mixed_mkwrite(vma, vaddr, pfn);
+ else
+ error = vm_insert_mixed(vma, vaddr, pfn);
+
/* -EBUSY is fine, somebody else faulted on the same PTE */
if (error == -EBUSY)
error = 0;