ipc: rename ids->rw_mutex

Since in some situations the lock can be shared for readers, we shouldn't
be calling it a mutex, rename it to rwsem.

Signed-off-by: Davidlohr Bueso <davidlohr.bueso@hp.com>
Tested-by: Sedat Dilek <sedat.dilek@gmail.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Manfred Spraul <manfred@colorfullife.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --cc include/linux/ipc_namespace.h
Simple merge

diff --cc ipc/msg.c
Simple merge

diff --cc ipc/namespace.c
Simple merge

diff --cc ipc/sem.c
Simple merge

diff --cc ipc/shm.c
Simple merge

diff --cc ipc/util.c
Simple merge

diff --cc ipc/util.h
Simple merge