ipc: uninline some code from util.h
ipc_lock_check_down(), ipc_lock_check() and ipcget() seem too large to be inline. Besides, they give no optimization being inline as they perform calls inside in any case. Moving them into ipc/util.c saves 500 bytes of vmlinux and shortens IPC internal API. $ ./scripts/bloat-o-meter vmlinux-orig vmlinux add/remove: 3/2 grow/shrink: 0/10 up/down: 490/-989 (-499) function old new delta ipcget - 392 +392 ipc_lock_check_down - 49 +49 ipc_lock_check - 49 +49 sys_semget 119 105 -14 sys_shmget 108 86 -22 sys_msgget 100 78 -22 do_msgsnd 665 631 -34 do_msgrcv 680 644 -36 do_shmat 771 733 -38 sys_msgctl 1302 1229 -73 ipcget_new 80 - -80 sys_semtimedop 1534 1452 -82 sys_semctl 2034 1922 -112 sys_shmctl 1919 1765 -154 ipcget_public 322 - -322 The ipcget() growth is the result of gcc inlining of currently static ipcget_new/_public. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Cc: Nadia Derbey <Nadia.Derbey@bull.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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2 changed files with 57 additions and 58 deletions
55
ipc/util.c
55
ipc/util.c
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@ -248,7 +248,7 @@ int ipc_addid(struct ipc_ids* ids, struct kern_ipc_perm* new, int size)
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* This routine is called by sys_msgget, sys_semget() and sys_shmget()
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* when the key is IPC_PRIVATE.
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*/
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int ipcget_new(struct ipc_namespace *ns, struct ipc_ids *ids,
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static int ipcget_new(struct ipc_namespace *ns, struct ipc_ids *ids,
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struct ipc_ops *ops, struct ipc_params *params)
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{
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int err;
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@ -312,7 +312,7 @@ static int ipc_check_perms(struct kern_ipc_perm *ipcp, struct ipc_ops *ops,
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*
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* On success, the ipc id is returned.
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*/
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int ipcget_public(struct ipc_namespace *ns, struct ipc_ids *ids,
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static int ipcget_public(struct ipc_namespace *ns, struct ipc_ids *ids,
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struct ipc_ops *ops, struct ipc_params *params)
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{
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struct kern_ipc_perm *ipcp;
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@ -710,6 +710,57 @@ struct kern_ipc_perm *ipc_lock_down(struct ipc_ids *ids, int id)
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return out;
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}
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struct kern_ipc_perm *ipc_lock_check_down(struct ipc_ids *ids, int id)
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{
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struct kern_ipc_perm *out;
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out = ipc_lock_down(ids, id);
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if (IS_ERR(out))
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return out;
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if (ipc_checkid(out, id)) {
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ipc_unlock(out);
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return ERR_PTR(-EIDRM);
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}
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return out;
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}
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struct kern_ipc_perm *ipc_lock_check(struct ipc_ids *ids, int id)
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{
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struct kern_ipc_perm *out;
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out = ipc_lock(ids, id);
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if (IS_ERR(out))
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return out;
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if (ipc_checkid(out, id)) {
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ipc_unlock(out);
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return ERR_PTR(-EIDRM);
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}
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return out;
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}
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/**
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* ipcget - Common sys_*get() code
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* @ns : namsepace
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* @ids : IPC identifier set
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* @ops : operations to be called on ipc object creation, permission checks
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* and further checks
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* @params : the parameters needed by the previous operations.
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*
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* Common routine called by sys_msgget(), sys_semget() and sys_shmget().
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*/
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int ipcget(struct ipc_namespace *ns, struct ipc_ids *ids,
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struct ipc_ops *ops, struct ipc_params *params)
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{
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if (params->key == IPC_PRIVATE)
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return ipcget_new(ns, ids, ops, params);
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else
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return ipcget_public(ns, ids, ops, params);
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}
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#ifdef __ARCH_WANT_IPC_PARSE_VERSION
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60
ipc/util.h
60
ipc/util.h
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@ -131,10 +131,6 @@ int ipc_parse_version (int *cmd);
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extern void free_msg(struct msg_msg *msg);
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extern struct msg_msg *load_msg(const void __user *src, int len);
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extern int store_msg(void __user *dest, struct msg_msg *msg, int len);
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extern int ipcget_new(struct ipc_namespace *, struct ipc_ids *,
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struct ipc_ops *, struct ipc_params *);
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extern int ipcget_public(struct ipc_namespace *, struct ipc_ids *,
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struct ipc_ops *, struct ipc_params *);
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static inline int ipc_buildid(int id, int seq)
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{
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@ -163,57 +159,9 @@ static inline void ipc_unlock(struct kern_ipc_perm *perm)
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rcu_read_unlock();
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}
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static inline struct kern_ipc_perm *ipc_lock_check_down(struct ipc_ids *ids,
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int id)
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{
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struct kern_ipc_perm *out;
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out = ipc_lock_down(ids, id);
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if (IS_ERR(out))
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return out;
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if (ipc_checkid(out, id)) {
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ipc_unlock(out);
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return ERR_PTR(-EIDRM);
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}
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return out;
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}
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static inline struct kern_ipc_perm *ipc_lock_check(struct ipc_ids *ids,
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int id)
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{
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struct kern_ipc_perm *out;
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out = ipc_lock(ids, id);
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if (IS_ERR(out))
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return out;
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if (ipc_checkid(out, id)) {
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ipc_unlock(out);
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return ERR_PTR(-EIDRM);
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}
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return out;
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}
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/**
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* ipcget - Common sys_*get() code
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* @ns : namsepace
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* @ids : IPC identifier set
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* @ops : operations to be called on ipc object creation, permission checks
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* and further checks
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* @params : the parameters needed by the previous operations.
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*
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* Common routine called by sys_msgget(), sys_semget() and sys_shmget().
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*/
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static inline int ipcget(struct ipc_namespace *ns, struct ipc_ids *ids,
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struct ipc_ops *ops, struct ipc_params *params)
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{
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if (params->key == IPC_PRIVATE)
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return ipcget_new(ns, ids, ops, params);
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else
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return ipcget_public(ns, ids, ops, params);
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}
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struct kern_ipc_perm *ipc_lock_check_down(struct ipc_ids *ids, int id);
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struct kern_ipc_perm *ipc_lock_check(struct ipc_ids *ids, int id);
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int ipcget(struct ipc_namespace *ns, struct ipc_ids *ids,
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struct ipc_ops *ops, struct ipc_params *params);
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#endif
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