md: add md_submit_discard_bio() for submitting discard bio

Move these logic from raid0.c to md.c, so that we can also use it in
raid10.c.

Reviewed-by: Coly Li <[email protected]>
Reviewed-by: Guoqing Jiang <[email protected]>
Tested-by: Adrian Huang <[email protected]>
Signed-off-by: Xiao Ni <[email protected]>
Signed-off-by: Song Liu <[email protected]>

0 files changed, 0 insertions, 0 deletions