diff options
| author | Kees Cook <keescook@chromium.org> | 2017-07-12 23:35:10 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-07-13 01:26:02 +0200 |
| commit | c3f6fb6fe4e638a58eae558cb209c463cd46c2fc (patch) | |
| tree | ae8c9acb31bd1bb06be3f2b96df4af8fe567a8d7 /ipc | |
| parent | ipc/msg: avoid ipc_rcu_alloc() (diff) | |
| download | linux-c3f6fb6fe4e638a58eae558cb209c463cd46c2fc.tar.xz linux-c3f6fb6fe4e638a58eae558cb209c463cd46c2fc.zip | |
ipc/util: drop ipc_rcu_alloc()
No callers remain for ipc_rcu_alloc(). Drop the function.
[manfred@colorfullife.com: Rediff because the memset was temporarily inside ipc_rcu_free()]
Link: http://lkml.kernel.org/r/20170525185107.12869-13-manfred@colorfullife.com
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Manfred Spraul <manfred@colorfullife.com>
Cc: Kees Cook <keescook@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'ipc')
| -rw-r--r-- | ipc/util.c | 21 | ||||
| -rw-r--r-- | ipc/util.h | 3 |
2 files changed, 0 insertions, 24 deletions
diff --git a/ipc/util.c b/ipc/util.c index 556884bab698..2428dd44ca97 100644 --- a/ipc/util.c +++ b/ipc/util.c @@ -394,27 +394,6 @@ void ipc_rmid(struct ipc_ids *ids, struct kern_ipc_perm *ipcp) ipcp->deleted = true; } -/** - * ipc_rcu_alloc - allocate ipc space - * @size: size desired - * - * Allocate memory for an ipc object. - * The first member must be struct kern_ipc_perm. - */ -struct kern_ipc_perm *ipc_rcu_alloc(int size) -{ - /* - * We prepend the allocation with the rcu struct - */ - struct kern_ipc_perm *out = kvmalloc(size, GFP_KERNEL); - if (unlikely(!out)) - return NULL; - - memset(out, 0, size); - atomic_set(&out->refcount, 1); - return out; -} - int ipc_rcu_getref(struct kern_ipc_perm *ptr) { return atomic_inc_not_zero(&ptr->refcount); diff --git a/ipc/util.h b/ipc/util.h index 44efbc0b635b..77336c2bdb9c 100644 --- a/ipc/util.h +++ b/ipc/util.h @@ -112,10 +112,7 @@ int ipcperms(struct ipc_namespace *ns, struct kern_ipc_perm *ipcp, short flg); * Objects are reference counted, they start with reference count 1. * getref increases the refcount, the putref call that reduces the recount * to 0 schedules the rcu destruction. Caller must guarantee locking. - * - * struct kern_ipc_perm must be the first member in the allocated structure. */ -struct kern_ipc_perm *ipc_rcu_alloc(int size); int ipc_rcu_getref(struct kern_ipc_perm *ptr); void ipc_rcu_putref(struct kern_ipc_perm *ptr, void (*func)(struct rcu_head *head)); |