Davidlohr Bueso 5f2a2d5d42 ipc,msg: drop dst nil validation in copy_msg ... d0edd85283 ("ipc: convert invalid scenarios to use WARN_ON") relaxed the nil dst parameter check, originally being a full BUG_ON. However, this check seems quite unnecessary when the only purpose is for ceckpoint/restore (MSG_COPY flag): o The copy variable is set initially to nil, apparently as a way of ensuring that prepare_copy is previously called. Which is in fact done, unconditionally at the beginning of do_msgrcv. o There is no concurrency with 'copy' (stack allocated in do_msgrcv). Furthermore, any errors in 'copy' (and thus prepare_copy/copy_msg) should always handled by IS_ERR() family. Therefore remove this check altogether as it can never occur with the current users. Signed-off-by: Davidlohr Bueso <dbueso@suse.de> Cc: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2015-11-06 17:50:42 -08:00
..
compat_mq.c
compat.c
ipc_sysctl.c
Makefile
mq_sysctl.c
mqueue.c
msg.c
msgutil.c	ipc,msg: drop dst nil validation in copy_msg	2015-11-06 17:50:42 -08:00
namespace.c
sem.c
shm.c
syscall.c
util.c
util.h