提交 15d77835 编写于 作者: L Lee Schermerhorn 提交者: Linus Torvalds

mempolicy: factor mpol_shared_policy_init() return paths

Factor out duplicate put/frees in mpol_shared_policy_init() to a common
return path.
Signed-off-by: NLee Schermerhorn <lee.schermerhorn@hp.com>
Cc: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Cc: Ravikiran Thirumalai <kiran@scalex86.org>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Christoph Lameter <cl@linux-foundation.org>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
上级 345ace9c
......@@ -1995,26 +1995,22 @@ void mpol_shared_policy_init(struct shared_policy *sp, struct mempolicy *mpol)
return;
/* contextualize the tmpfs mount point mempolicy */
new = mpol_new(mpol->mode, mpol->flags, &mpol->w.user_nodemask);
if (IS_ERR(new)) {
mpol_put(mpol); /* drop our ref on sb mpol */
NODEMASK_SCRATCH_FREE(scratch);
return; /* no valid nodemask intersection */
}
if (IS_ERR(new))
goto put_free; /* no valid nodemask intersection */
task_lock(current);
ret = mpol_set_nodemask(new, &mpol->w.user_nodemask, scratch);
task_unlock(current);
mpol_put(mpol); /* drop our ref on sb mpol */
if (ret) {
NODEMASK_SCRATCH_FREE(scratch);
mpol_put(new);
return;
}
if (ret)
goto put_free;
/* Create pseudo-vma that contains just the policy */
memset(&pvma, 0, sizeof(struct vm_area_struct));
pvma.vm_end = TASK_SIZE; /* policy covers entire file */
mpol_set_shared_policy(sp, &pvma, new); /* adds ref */
put_free:
mpol_put(new); /* drop initial ref */
NODEMASK_SCRATCH_FREE(scratch);
}
......
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