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[PATCH] sem2mutex: ipc, id.sem

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Semaphore to mutex conversion.

The conversion was generated via scripts, and the result was validated
automatically via a script as well.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: Manfred Spraul <manfred@colorfullife.com>
Signed-off-by: Lee Schermerhorn <lee.schermerhorn@hp.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Ingo Molnar
2006-03-26 01:37:17 -08:00
committed by Linus Torvalds
parent 14cc3e2b63
commit 5f921ae96f
7 changed files with 65 additions and 56 deletions
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29
ipc/util.c
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@@ -68,7 +68,8 @@ __initcall(ipc_init);
void __init ipc_init_ids(struct ipc_ids* ids, int size)
{
int i;
sema_init(&ids->sem,1);
mutex_init(&ids->mutex);
if(size > IPCMNI)
size = IPCMNI;
@@ -138,7 +139,7 @@ void __init ipc_init_proc_interface(const char *path, const char *header,
* @ids: Identifier set
* @key: The key to find
*
* Requires ipc_ids.sem locked.
* Requires ipc_ids.mutex locked.
* Returns the identifier if found or -1 if not.
*/
@@ -150,7 +151,7 @@ int ipc_findkey(struct ipc_ids* ids, key_t key)
/*
* rcu_dereference() is not needed here
* since ipc_ids.sem is held
* since ipc_ids.mutex is held
*/
for (id = 0; id <= max_id; id++) {
p = ids->entries->p[id];
@@ -163,7 +164,7 @@ int ipc_findkey(struct ipc_ids* ids, key_t key)
}
/*
* Requires ipc_ids.sem locked
* Requires ipc_ids.mutex locked
*/
static int grow_ary(struct ipc_ids* ids, int newsize)
{
@@ -210,7 +211,7 @@ static int grow_ary(struct ipc_ids* ids, int newsize)
* is returned. The list is returned in a locked state on success.
* On failure the list is not locked and -1 is returned.
*
* Called with ipc_ids.sem held.
* Called with ipc_ids.mutex held.
*/
int ipc_addid(struct ipc_ids* ids, struct kern_ipc_perm* new, int size)
@@ -221,7 +222,7 @@ int ipc_addid(struct ipc_ids* ids, struct kern_ipc_perm* new, int size)
/*
* rcu_dereference()() is not needed here since
* ipc_ids.sem is held
* ipc_ids.mutex is held
*/
for (id = 0; id < size; id++) {
if(ids->entries->p[id] == NULL)
@@ -257,7 +258,7 @@ found:
* fed an invalid identifier. The entry is removed and internal
* variables recomputed. The object associated with the identifier
* is returned.
* ipc_ids.sem and the spinlock for this ID is hold before this function
* ipc_ids.mutex and the spinlock for this ID is hold before this function
* is called, and remain locked on the exit.
*/
@@ -270,7 +271,7 @@ struct kern_ipc_perm* ipc_rmid(struct ipc_ids* ids, int id)
/*
* do not need a rcu_dereference()() here to force ordering
* on Alpha, since the ipc_ids.sem is held.
* on Alpha, since the ipc_ids.mutex is held.
*/
p = ids->entries->p[lid];
ids->entries->p[lid] = NULL;
@@ -530,13 +531,13 @@ void ipc64_perm_to_ipc_perm (struct ipc64_perm *in, struct ipc_perm *out)
/*
* So far only shm_get_stat() calls ipc_get() via shm_get(), so ipc_get()
* is called with shm_ids.sem locked. Since grow_ary() is also called with
* shm_ids.sem down(for Shared Memory), there is no need to add read
* is called with shm_ids.mutex locked. Since grow_ary() is also called with
* shm_ids.mutex down(for Shared Memory), there is no need to add read
* barriers here to gurantee the writes in grow_ary() are seen in order
* here (for Alpha).
*
* However ipc_get() itself does not necessary require ipc_ids.sem down. So
* if in the future ipc_get() is used by other places without ipc_ids.sem
* However ipc_get() itself does not necessary require ipc_ids.mutex down. So
* if in the future ipc_get() is used by other places without ipc_ids.mutex
* down, then ipc_get() needs read memery barriers as ipc_lock() does.
*/
struct kern_ipc_perm* ipc_get(struct ipc_ids* ids, int id)
@@ -667,7 +668,7 @@ static void *sysvipc_proc_start(struct seq_file *s, loff_t *pos)
* Take the lock - this will be released by the corresponding
* call to stop().
*/
down(&iface->ids->sem);
mutex_lock(&iface->ids->mutex);
/* pos < 0 is invalid */
if (*pos < 0)
@@ -697,7 +698,7 @@ static void sysvipc_proc_stop(struct seq_file *s, void *it)
ipc_unlock(ipc);
/* Release the lock we took in start() */
up(&iface->ids->sem);
mutex_unlock(&iface->ids->mutex);
}
static int sysvipc_proc_show(struct seq_file *s, void *it)