Messages in this thread Patch in this message | | | From | Toshi Kani <> | Subject | [PATCH v2 4/5] ext2: call dax_get_unmapped_area() for DAX pmd mappings | Date | Tue, 12 Apr 2016 14:39:31 -0600 |
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To support DAX pmd mappings with unmodified applications, filesystems need to align an mmap address by the pmd size.
Call dax_get_unmapped_area() from f_op->get_unmapped_area.
Note, there is no change in behavior for a non-DAX file.
Signed-off-by: Toshi Kani <toshi.kani@hpe.com> Cc: Jan Kara <jack@suse.cz> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Matthew Wilcox <willy@linux.intel.com> Cc: Ross Zwisler <ross.zwisler@linux.intel.com> Cc: <linux-ext4@vger.kernel.org> --- fs/ext2/file.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/fs/ext2/file.c b/fs/ext2/file.c index c1400b1..f1b8006 100644 --- a/fs/ext2/file.c +++ b/fs/ext2/file.c @@ -172,6 +172,9 @@ const struct file_operations ext2_file_operations = { .open = dquot_file_open, .release = ext2_release_file, .fsync = ext2_fsync, +#ifdef CONFIG_FS_DAX + .get_unmapped_area = dax_get_unmapped_area, +#endif .splice_read = generic_file_splice_read, .splice_write = iter_file_splice_write, };
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