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authorLee Schermerhorn <lee.schermerhorn@hp.com>2008-04-28 05:13:08 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2008-04-28 11:58:23 -0400
commitf0be3d32b05d3fea2fcdbbb81a39dac2a7163169 (patch)
tree5794ce6a8befbce82cd3e44ff15fbf3bb5f2f3bf /kernel/exit.c
parent3b1163006332302117b1b2acf226d4014ff46525 (diff)
mempolicy: rename mpol_free to mpol_put
This is a change that was requested some time ago by Mel Gorman. Makes sense to me, so here it is. Note: I retain the name "mpol_free_shared_policy()" because it actually does free the shared_policy, which is NOT a reference counted object. However, ... The mempolicy object[s] referenced by the shared_policy are reference counted, so mpol_put() is used to release the reference held by the shared_policy. The mempolicy might not be freed at this time, because some task attached to the shared object associated with the shared policy may be in the process of allocating a page based on the mempolicy. In that case, the task performing the allocation will hold a reference on the mempolicy, obtained via mpol_shared_policy_lookup(). The mempolicy will be freed when all tasks holding such a reference have called mpol_put() for the mempolicy. Signed-off-by: Lee Schermerhorn <lee.schermerhorn@hp.com> Cc: Christoph Lameter <clameter@sgi.com> Cc: David Rientjes <rientjes@google.com> Cc: Mel Gorman <mel@csn.ul.ie> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/exit.c')
-rw-r--r--kernel/exit.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/exit.c b/kernel/exit.c
index 97f609f574b1..2a9d98c641ac 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -967,7 +967,7 @@ NORET_TYPE void do_exit(long code)
967 proc_exit_connector(tsk); 967 proc_exit_connector(tsk);
968 exit_notify(tsk, group_dead); 968 exit_notify(tsk, group_dead);
969#ifdef CONFIG_NUMA 969#ifdef CONFIG_NUMA
970 mpol_free(tsk->mempolicy); 970 mpol_put(tsk->mempolicy);
971 tsk->mempolicy = NULL; 971 tsk->mempolicy = NULL;
972#endif 972#endif
973#ifdef CONFIG_FUTEX 973#ifdef CONFIG_FUTEX