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mm/readahead: Align file mappings for non-DAX

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When we have the opportunity to use PMDs 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>
This commit is contained in:
William Kucharski 2019-09-22 08:43:15 -04:00 committed by Matthew Wilcox (Oracle)
parent 793917d997
commit 1854bc6e24
1 changed files with 1 additions and 4 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

5
mm/huge_memory.c
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@ -582,13 +582,10 @@ unsigned long thp_get_unmapped_area(struct file *filp, unsigned long addr,
unsigned long ret; unsigned long ret;
loff_t off = (loff_t)pgoff << PAGE_SHIFT; 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); ret = __thp_get_unmapped_area(filp, addr, len, off, flags, PMD_SIZE);
if (ret) if (ret)
return ret; return ret;
out:
return current->mm->get_unmapped_area(filp, addr, len, pgoff, flags); return current->mm->get_unmapped_area(filp, addr, len, pgoff, flags);
} }
EXPORT_SYMBOL_GPL(thp_get_unmapped_area); EXPORT_SYMBOL_GPL(thp_get_unmapped_area);