[v5,39/39] mm: Align THP mappings for non-DAX
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Message ID 20200529025824.32296-40-willy@infradead.org
State New
Headers show
Series
  • Large pages in the page cache
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Commit Message

Matthew Wilcox May 29, 2020, 2:58 a.m. UTC
From: William Kucharski <william.kucharski@oracle.com>

When we have the opportunity to use transparent huge pages to map a
file, we want to follow the same rules as DAX.

Signed-off-by: William Kucharski <william.kucharski@oracle.com>
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
---
 mm/huge_memory.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

Patch
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diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 4c4f92349829..9b6f7b86bac7 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -577,13 +577,10 @@  unsigned long thp_get_unmapped_area(struct file *filp, unsigned long addr,
 	unsigned long ret;
 	loff_t off = (loff_t)pgoff << PAGE_SHIFT;
 
-	if (!IS_DAX(filp->f_mapping->host) || !IS_ENABLED(CONFIG_FS_DAX_PMD))
-		goto out;
-
 	ret = __thp_get_unmapped_area(filp, addr, len, off, flags, PMD_SIZE);
 	if (ret)
 		return ret;
-out:
+
 	return current->mm->get_unmapped_area(filp, addr, len, pgoff, flags);
 }
 EXPORT_SYMBOL_GPL(thp_get_unmapped_area);