end_offset = min_t(loff_t, isize, iocb->ki_pos + iter->count);
/*
+ * Pairs with a barrier in
+ * block_write_end()->mark_buffer_dirty() or other page
+ * dirtying routines like iomap_write_end() to ensure
+ * changes to page contents are visible before we see
+ * increased inode size.
+ */
+ smp_rmb();
+
+ /*
* Once we start copying data, we don't want to be touching any
* cachelines that might be contended:
*/
}
}
- if (pmd_none(*vmf->pmd))
+ if (pmd_none(*vmf->pmd) && vmf->prealloc_pte)
pmd_install(mm, vmf->pmd, &vmf->prealloc_pte);
return false;