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Subject[PATCH 2/4] ipc: drop ipc_lock_by_ptr
Date
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>
---
ipc/namespace.c | 3 ++-
ipc/util.c | 6 ++++--
ipc/util.h | 6 ------
3 files changed, 6 insertions(+), 9 deletions(-)

diff --git a/ipc/namespace.c b/ipc/namespace.c
index 67dc744..aba9a58 100644
--- a/ipc/namespace.c
+++ b/ipc/namespace.c
@@ -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++;
}
diff --git a/ipc/util.c b/ipc/util.c
index 1ddadcf..9f6aa30 100644
--- a/ipc/util.c
+++ b/ipc/util.c
@@ -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;
}
}
diff --git a/ipc/util.h b/ipc/util.h
index 0a362ff..14b0a2a 100644
--- a/ipc/util.h
+++ b/ipc/util.h
@@ -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);
--
1.7.11.7


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