NeilBrown 33f2c35a54 md: add feature flag MD_FEATURE_RAID0_LAYOUT ... Due to a bug introduced in Linux 3.14 we cannot determine the correctly layout for a multi-zone RAID0 array - there are two possibilities. It is possible to tell the kernel which to chose using a module parameter, but this can be clumsy to use. It would be best if the choice were recorded in the metadata. So add a feature flag for this purpose. If it is set, then the 'layout' field of the superblock is used to determine which layout to use. If this flag is not set, then mddev->layout gets set to -1, which causes the module parameter to be required. Acked-by: Guoqing Jiang <guoqing.jiang@cloud.ionos.com> Signed-off-by: NeilBrown <neilb@suse.de> Signed-off-by: Song Liu <songliubraving@fb.com>		2019-09-13 13:10:06 -07:00
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md_p.h	md: add feature flag MD_FEATURE_RAID0_LAYOUT	2019-09-13 13:10:06 -07:00
md_u.h