Messages in this thread Patch in this message | | | Subject | [PATCH 1/4] ipc: simplify free_copy() call | From | Stanislav Kinsbursky <> | Date | Wed, 07 Nov 2012 13:04:55 +0300 |
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Passing and checking of msgflg to free_copy() is redundant. This patch sets copy to NULL on declaration instead and checks for non-NULL in free_copy().
Note: in case of copy allocation failure, error is returned immediately. So no need to check for IS_ERR() in free_copy().
Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> --- ipc/msg.c | 14 ++++++++------ 1 files changed, 8 insertions(+), 6 deletions(-)
diff --git a/ipc/msg.c b/ipc/msg.c index a0b0224..f1070c3 100644 --- a/ipc/msg.c +++ b/ipc/msg.c @@ -797,15 +797,17 @@ static inline struct msg_msg *prepare_copy(void __user *buf, size_t bufsz, return copy; } -static inline void free_copy(int msgflg, struct msg_msg *copy) +static inline void free_copy(struct msg_msg *copy) { - if (msgflg & MSG_COPY) + if (copy) free_msg(copy); } #else -#define free_copy(msgflg, copy) do {} while (0) #define prepare_copy(buf, sz, msgflg, msgtyp, copy_nr) ERR_PTR(-ENOSYS) #define fill_copy(copy_nr, msg_nr, msg, copy) NULL +static inline void free_copy(struct msg_msg *copy) +{ +} #endif long do_msgrcv(int msqid, void __user *buf, size_t bufsz, long msgtyp, @@ -816,7 +818,7 @@ long do_msgrcv(int msqid, void __user *buf, size_t bufsz, long msgtyp, struct msg_msg *msg; int mode; struct ipc_namespace *ns; - struct msg_msg *copy; + struct msg_msg *copy = NULL; unsigned long __maybe_unused copy_number; if (msqid < 0 || (long) bufsz < 0) @@ -831,7 +833,7 @@ long do_msgrcv(int msqid, void __user *buf, size_t bufsz, long msgtyp, msq = msg_lock_check(ns, msqid); if (IS_ERR(msq)) { - free_copy(msgflg, copy); + free_copy(copy); return PTR_ERR(msq); } @@ -964,7 +966,7 @@ out_unlock: } } if (IS_ERR(msg)) { - free_copy(msgflg, copy); + free_copy(copy); return PTR_ERR(msg); }
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