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ipc: remove the ipc_get() routine

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This is a trivial patch that removes the ipc_get() routine: it is replaced
by a call to idr_find().

Signed-off-by: Nadia Derbey <Nadia.Derbey@bull.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Nadia Derbey
2007-10-18 23:40:50 -07:00
committed by Linus Torvalds
parent 7748dbfaa0
commit 637c366340
3 changed files with 13 additions and 23 deletions
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19
ipc/util.c
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@@ -669,25 +669,6 @@ void ipc64_perm_to_ipc_perm (struct ipc64_perm *in, struct ipc_perm *out)
out->seq = in->seq;
}
/*
* So far only shm_get_stat() calls ipc_get() via shm_get(), so ipc_get()
* 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.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)
{
struct kern_ipc_perm *out;
int lid = id % SEQ_MULTIPLIER;
out = idr_find(&ids->ipcs_idr, lid);
return out;
}
struct kern_ipc_perm *ipc_lock(struct ipc_ids *ids, int id)
{
struct kern_ipc_perm *out;