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dax: Inline dax_insert_mapping() into the callsite 

dax_insert_mapping() has only one callsite and we will need to further
fine tune what it does for synchronous faults. Just inline it into the
callsite so that we don't have to pass awkward bools around.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Jan Kara 2017-11-01 16:36:36 +01:00 committed by Dan Williams
parent d2c43ef133
commit 1b5a1cb21e
1 changed files with 19 additions and 27 deletions
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46
fs/dax.c
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@ -858,32 +858,6 @@ static int dax_iomap_pfn(struct iomap *iomap, loff_t pos, size_t size,
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;