Messages in this thread Patch in this message | | | From | Toshi Kani <> | Subject | [PATCH v2 5/5] block: call dax_get_unmapped_area() for DAX pmd mappings | Date | Tue, 12 Apr 2016 14:39:32 -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: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Matthew Wilcox <willy@linux.intel.com> Cc: Ross Zwisler <ross.zwisler@linux.intel.com> --- fs/block_dev.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/fs/block_dev.c b/fs/block_dev.c index 20a2c02..0274802 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -1798,6 +1798,9 @@ const struct file_operations def_blk_fops = { .write_iter = blkdev_write_iter, .mmap = blkdev_mmap, .fsync = blkdev_fsync, +#ifdef CONFIG_FS_DAX + .get_unmapped_area = dax_get_unmapped_area, +#endif .unlocked_ioctl = block_ioctl, #ifdef CONFIG_COMPAT .compat_ioctl = compat_blkdev_ioctl,
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