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authorDave Jiang <dave.jiang@intel.com>2017-02-23 02:40:06 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2017-02-23 03:41:26 +0300
commitf42003917b4569a2f4f0c79c35e1e3df2859f81a (patch)
tree93532f9f8deee9a6ad2f309e2edde57400a2e774 /fs/dax.c
parentd8a849e1bc123790bbbf1facba94452a3aef5736 (diff)
downloadlinux-f42003917b4569a2f4f0c79c35e1e3df2859f81a.tar.xz
mm, dax: change pmd_fault() to take only vmf parameter
pmd_fault() and related functions really only need the vmf parameter since the additional parameters are all included in the vmf struct. Remove the additional parameter and simplify pmd_fault() and friends. Link: http://lkml.kernel.org/r/1484085142-2297-8-git-send-email-ross.zwisler@linux.intel.com Signed-off-by: Dave Jiang <dave.jiang@intel.com> Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com> Reviewed-by: Jan Kara <jack@suse.cz> Cc: Dave Chinner <david@fromorbit.com> Cc: Dave Jiang <dave.jiang@intel.com> Cc: Matthew Wilcox <mawilcox@microsoft.com> Cc: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/dax.c')
-rw-r--r--fs/dax.c54
1 files changed, 25 insertions, 29 deletions
diff --git a/fs/dax.c b/fs/dax.c
index 01fdbc86ee8c..d800197aba34 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -1256,11 +1256,10 @@ EXPORT_SYMBOL_GPL(dax_iomap_fault);
*/
#define PG_PMD_COLOUR ((PMD_SIZE >> PAGE_SHIFT) - 1)
-static int dax_pmd_insert_mapping(struct vm_area_struct *vma, pmd_t *pmd,
- struct vm_fault *vmf, unsigned long address,
- struct iomap *iomap, loff_t pos, bool write, void **entryp)
+static int dax_pmd_insert_mapping(struct vm_fault *vmf, struct iomap *iomap,
+ loff_t pos, void **entryp)
{
- struct address_space *mapping = vma->vm_file->f_mapping;
+ struct address_space *mapping = vmf->vma->vm_file->f_mapping;
struct block_device *bdev = iomap->bdev;
struct inode *inode = mapping->host;
struct blk_dax_ctl dax = {
@@ -1287,31 +1286,30 @@ static int dax_pmd_insert_mapping(struct vm_area_struct *vma, pmd_t *pmd,
goto fallback;
*entryp = ret;
- trace_dax_pmd_insert_mapping(inode, vma, address, write, length,
- dax.pfn, ret);
- return vmf_insert_pfn_pmd(vma, address, pmd, dax.pfn, write);
+ trace_dax_pmd_insert_mapping(inode, vmf, length, dax.pfn, ret);
+ return vmf_insert_pfn_pmd(vmf->vma, vmf->address, vmf->pmd,
+ dax.pfn, vmf->flags & FAULT_FLAG_WRITE);
unmap_fallback:
dax_unmap_atomic(bdev, &dax);
fallback:
- trace_dax_pmd_insert_mapping_fallback(inode, vma, address, write,
- length, dax.pfn, ret);
+ trace_dax_pmd_insert_mapping_fallback(inode, vmf, length,
+ dax.pfn, ret);
return VM_FAULT_FALLBACK;
}
-static int dax_pmd_load_hole(struct vm_area_struct *vma, pmd_t *pmd,
- struct vm_fault *vmf, unsigned long address,
- struct iomap *iomap, void **entryp)
+static int dax_pmd_load_hole(struct vm_fault *vmf, struct iomap *iomap,
+ void **entryp)
{
- struct address_space *mapping = vma->vm_file->f_mapping;
- unsigned long pmd_addr = address & PMD_MASK;
+ struct address_space *mapping = vmf->vma->vm_file->f_mapping;
+ unsigned long pmd_addr = vmf->address & PMD_MASK;
struct inode *inode = mapping->host;
struct page *zero_page;
void *ret = NULL;
spinlock_t *ptl;
pmd_t pmd_entry;
- zero_page = mm_get_huge_zero_page(vma->vm_mm);
+ zero_page = mm_get_huge_zero_page(vmf->vma->vm_mm);
if (unlikely(!zero_page))
goto fallback;
@@ -1322,27 +1320,27 @@ static int dax_pmd_load_hole(struct vm_area_struct *vma, pmd_t *pmd,
goto fallback;
*entryp = ret;
- ptl = pmd_lock(vma->vm_mm, pmd);
- if (!pmd_none(*pmd)) {
+ ptl = pmd_lock(vmf->vma->vm_mm, vmf->pmd);
+ if (!pmd_none(*(vmf->pmd))) {
spin_unlock(ptl);
goto fallback;
}
- pmd_entry = mk_pmd(zero_page, vma->vm_page_prot);
+ pmd_entry = mk_pmd(zero_page, vmf->vma->vm_page_prot);
pmd_entry = pmd_mkhuge(pmd_entry);
- set_pmd_at(vma->vm_mm, pmd_addr, pmd, pmd_entry);
+ set_pmd_at(vmf->vma->vm_mm, pmd_addr, vmf->pmd, pmd_entry);
spin_unlock(ptl);
- trace_dax_pmd_load_hole(inode, vma, address, zero_page, ret);
+ trace_dax_pmd_load_hole(inode, vmf, zero_page, ret);
return VM_FAULT_NOPAGE;
fallback:
- trace_dax_pmd_load_hole_fallback(inode, vma, address, zero_page, ret);
+ trace_dax_pmd_load_hole_fallback(inode, vmf, zero_page, ret);
return VM_FAULT_FALLBACK;
}
-int dax_iomap_pmd_fault(struct vm_area_struct *vma, struct vm_fault *vmf,
- struct iomap_ops *ops)
+int dax_iomap_pmd_fault(struct vm_fault *vmf, struct iomap_ops *ops)
{
+ struct vm_area_struct *vma = vmf->vma;
struct address_space *mapping = vma->vm_file->f_mapping;
unsigned long pmd_addr = vmf->address & PMD_MASK;
bool write = vmf->flags & FAULT_FLAG_WRITE;
@@ -1363,7 +1361,7 @@ int dax_iomap_pmd_fault(struct vm_area_struct *vma, struct vm_fault *vmf,
pgoff = linear_page_index(vma, pmd_addr);
max_pgoff = (i_size_read(inode) - 1) >> PAGE_SHIFT;
- trace_dax_pmd_fault(inode, vma, vmf, max_pgoff, 0);
+ trace_dax_pmd_fault(inode, vmf, max_pgoff, 0);
/* Fall back to PTEs if we're going to COW */
if (write && !(vma->vm_flags & VM_SHARED))
@@ -1409,15 +1407,13 @@ int dax_iomap_pmd_fault(struct vm_area_struct *vma, struct vm_fault *vmf,
switch (iomap.type) {
case IOMAP_MAPPED:
- result = dax_pmd_insert_mapping(vma, vmf->pmd, vmf,
- vmf->address, &iomap, pos, write, &entry);
+ result = dax_pmd_insert_mapping(vmf, &iomap, pos, &entry);
break;
case IOMAP_UNWRITTEN:
case IOMAP_HOLE:
if (WARN_ON_ONCE(write))
goto unlock_entry;
- result = dax_pmd_load_hole(vma, vmf->pmd, vmf, vmf->address,
- &iomap, &entry);
+ result = dax_pmd_load_hole(vmf, &iomap, &entry);
break;
default:
WARN_ON_ONCE(1);
@@ -1447,7 +1443,7 @@ int dax_iomap_pmd_fault(struct vm_area_struct *vma, struct vm_fault *vmf,
count_vm_event(THP_FAULT_FALLBACK);
}
out:
- trace_dax_pmd_fault_done(inode, vma, vmf, max_pgoff, result);
+ trace_dax_pmd_fault_done(inode, vmf, max_pgoff, result);
return result;
}
EXPORT_SYMBOL_GPL(dax_iomap_pmd_fault);