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ipc: drop ipc_lock_by_ptr 

After previous cleanups and optimizations, this function is no longer
heavily used and we don't have a good reason to keep it.  Update the few
remaining callers and get rid of it.

Signed-off-by: Davidlohr Bueso <davidlohr.bueso@hp.com>
Cc: Sedat Dilek <sedat.dilek@gmail.com>
Cc: Rik van Riel <riel@redhat.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:
Davidlohr Bueso 2013-09-11 14:26:29 -07:00 committed by Linus Torvalds
parent 530fcd16d8
commit 32a2750010
3 changed files with 6 additions and 9 deletions
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3
ipc/namespace.c
View File

@ -89,7 +89,8 @@ void free_ipcs(struct ipc_namespace *ns, struct ipc_ids *ids,
perm = idr_find(&ids->ipcs_idr, next_id);
if (perm == NULL)
continue;
ipc_lock_by_ptr(perm);
rcu_read_lock();
ipc_lock_object(perm);
free(ns, perm);
total++;
}

6
ipc/util.c
View File

@ -205,7 +205,8 @@ static struct kern_ipc_perm *ipc_findkey(struct ipc_ids *ids, key_t key)
continue;
}
ipc_lock_by_ptr(ipc);
rcu_read_lock();
ipc_lock_object(ipc);
return ipc;
}
@ -838,7 +839,8 @@ static struct kern_ipc_perm *sysvipc_find_ipc(struct ipc_ids *ids, loff_t pos,
ipc = idr_find(&ids->ipcs_idr, pos);
if (ipc != NULL) {
*new_pos = pos + 1;
ipc_lock_by_ptr(ipc);
rcu_read_lock();
ipc_lock_object(ipc);
return ipc;
}
}

6
ipc/util.h
View File

@ -171,12 +171,6 @@ static inline void ipc_assert_locked_object(struct kern_ipc_perm *perm)
assert_spin_locked(&perm->lock);
}
static inline void ipc_lock_by_ptr(struct kern_ipc_perm *perm)
{
rcu_read_lock();
ipc_lock_object(perm);
}
static inline void ipc_unlock(struct kern_ipc_perm *perm)
{
ipc_unlock_object(perm);