Re: kern/46592: lib/libc/sys/t_mmap cause kernel panic

[yamt%mwd.biglobe.ne.jp@localhost (YAMAMOTO Takashi)]

hi,

> but it looks like the intend of the code was to set the size for both block 
> and
> char disk devices, so I'm not sure what the right thing to do here really is.

good catch.

unless we want to revive checkalias, a fix would be
        - use bdev_type for VBLK
        - defer sd_opencnt-- logic for VBLK to somewhere later so that
          it covers mmap.  probably spec_inactive?
        - before decrementing sd_opencnt, flush caches.

YAMAMOTO Takashi