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ipc: constify ipc_ops

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There is no need to recreate the very same ipc_ops structure on every
kernel entry for msgget/semget/shmget.  Just declare it static and be
done with it.  While at it, constify it as we don't modify the structure
at runtime.

Found in the PaX patch, written by the PaX Team.

Signed-off-by: Mathias Krause <minipli@googlemail.com>
Cc: PaX Team <pageexec@freemail.hu>
Cc: Davidlohr Bueso <davidlohr@hp.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>
This commit is contained in:
Mathias Krause
2014-06-06 14:37:36 -07:00
committed by Linus Torvalds
parent 3e4e0f0a87
commit eb66ec44f8
5 changed files with 19 additions and 20 deletions
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9
ipc/msg.c
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@@ -306,15 +306,14 @@ static inline int msg_security(struct kern_ipc_perm *ipcp, int msgflg)
SYSCALL_DEFINE2(msgget, key_t, key, int, msgflg)
{
struct ipc_namespace *ns;
struct ipc_ops msg_ops;
static const struct ipc_ops msg_ops = {
.getnew = newque,
.associate = msg_security,
};
struct ipc_params msg_params;
ns = current->nsproxy->ipc_ns;
msg_ops.getnew = newque;
msg_ops.associate = msg_security;
msg_ops.more_checks = NULL;
msg_params.key = key;
msg_params.flg = msgflg;