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mempolicy: factor mpol_shared_policy_init() return paths

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Factor out duplicate put/frees in mpol_shared_policy_init() to a common
return path.

Signed-off-by: Lee Schermerhorn <[email protected]>
Cc: Hugh Dickins <[email protected]>
Cc: Ravikiran Thirumalai <[email protected]>
Cc: KOSAKI Motohiro <[email protected]>
Cc: Christoph Lameter <[email protected]>
Cc: David Rientjes <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Lee Schermerhorn 2010-05-24 14:32:04 -07:00 • committed by Linus Torvalds
commit 15d77835ac
1 changed files with 6 additions and 10 deletions
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16
mm/mempolicy.c
View file

@ -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);
}