On 5/3/07, Bahadir Balban <bahadir.balban@xxxxxxxxx> wrote:
Hi, In bio_endio() I want to access the buffer whose transfer has been completed. How do I do safely do this?
Hi, In fs/bio.c bio_endio() I have done: /* Get buffer address */ void *buf = __bio_kmap_atomic(bio, bio->bi_idx, KM_USER0); /* My action on the buffer */ flush_icache_range((unsigned long)buf, (unsigned long)(buf + bytes_done)); /* Give back buffer address */ __bio_kunmap_atomic(bio, KM_USER0); in order to get access to the buffer. It seemed like __bio_kmap_atomic() did what I want, but I am getting a kernel panic with faulty virtual address 0xd0000000. What am I missing? Would bio->bi_idx point me at the currently completed buffer for example? Is it ok to do kmap_atomic in bio_endio()? Thanks, Bahadir -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
