tree a9dee6eac97d75c688a84d5fe268b2e5a0b73e23
parent 40e8a10de2c9f87e892dcd5a6f9d1b208329ffea
author Tony Battersby <tonyb@cybernetics.com> 1238716706 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1238724301 -0700

ipc: make shm_get_stat() more robust

shm_get_stat() assumes idr_find(&shm_ids(ns).ipcs_idr) returns "struct
shmid_kernel *"; all other callers assume that it returns "struct
kern_ipc_perm *".  This works because "struct kern_ipc_perm" is currently
the first member of "struct shmid_kernel", but it would be better to use
container_of() to prevent future breakage.

Signed-off-by: Tony Battersby <tonyb@cybernetics.com>
Cc: Jiri Olsa <olsajiri@gmail.com>
Cc: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>