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dax: Fix condition for filling of PMD holes 

Currently dax_pmd_fault() decides to fill a PMD-sized hole only if
returned buffer has BH_Uptodate set. However that doesn't get set for
any mapping buffer so that branch is actually a dead code. The
BH_Uptodate check doesn't make any sense so just remove it.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
This commit is contained in:
Jan Kara 2016-05-12 18:29:14 +02:00 committed by Ross Zwisler
parent 40543f62cb
commit b9953536c9
1 changed files with 1 additions and 1 deletions
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2
fs/dax.c
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@ -788,7 +788,7 @@ int __dax_pmd_fault(struct vm_area_struct *vma, unsigned long address,
i_mmap_lock_read(mapping);
if (!write && !buffer_mapped(&bh) && buffer_uptodate(&bh)) {
if (!write && !buffer_mapped(&bh)) {
spinlock_t *ptl;
pmd_t entry;
struct page *zero_page = get_huge_zero_page();