Comment # 9 on bug 1106214 from Stanislav Brabec

Iakov Karpov, comment 8: I agree. Trimming the read-only partition sounds
wrong, and makes no sense. I assumed that your "Why would it try" refers to the
trimming of the partition itself.

Surprisingly, many kernel drivers have no problem with trimming of read-only
mounts.

To Jan K�ra: Do you think that kernel should implement EROFS error when trying
to FITRIM of read-only file system?