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authorToshi Kani <toshi.kani@hpe.com>2016-10-08 02:59:59 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2016-10-08 04:46:28 +0300
commitdbe6ec815641aa22b50775aaeb47fa3a8d04ccf1 (patch)
tree1be0e5c97f961a4a801fc417fde178707b93010b /fs/ext4
parent74d2fad1334d12bac8fe017aba598dd66c86628b (diff)
downloadlinux-dbe6ec815641aa22b50775aaeb47fa3a8d04ccf1.tar.xz
ext2/4, xfs: call thp_get_unmapped_area() for pmd mappings
To support DAX pmd mappings with unmodified applications, filesystems need to align an mmap address by the pmd size. Call thp_get_unmapped_area() from f_op->get_unmapped_area. Note, there is no change in behavior for a non-DAX file. Link: http://lkml.kernel.org/r/1472497881-9323-3-git-send-email-toshi.kani@hpe.com Signed-off-by: Toshi Kani <toshi.kani@hpe.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Matthew Wilcox <mawilcox@microsoft.com> Cc: Ross Zwisler <ross.zwisler@linux.intel.com> Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Dave Chinner <david@fromorbit.com> Cc: Jan Kara <jack@suse.cz> Cc: Theodore Ts'o <tytso@mit.edu> Cc: Andreas Dilger <adilger.kernel@dilger.ca> Cc: Mike Kravetz <mike.kravetz@oracle.com> Cc: "Kirill A. Shutemov" <kirill@shutemov.name> Cc: Hugh Dickins <hughd@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/ext4')
-rw-r--r--fs/ext4/file.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index 261ac3734c58..28f542bb0bda 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -703,6 +703,7 @@ const struct file_operations ext4_file_operations = {
.open = ext4_file_open,
.release = ext4_release_file,
.fsync = ext4_sync_file,
+ .get_unmapped_area = thp_get_unmapped_area,
.splice_read = generic_file_splice_read,
.splice_write = iter_file_splice_write,
.fallocate = ext4_fallocate,