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https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git
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Merge branch 'core-futexes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'core-futexes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: arm: Remove bogus comment in futex_atomic_cmpxchg_inatomic() futex: Deobfuscate handle_futex_death() plist: Add priority list test plist: Shrink struct plist_head futex,plist: Remove debug lock assignment from plist_node futex,plist: Pass the real head of the priority list to plist_del() futex: Sanitize futex ops argument types futex: Sanitize cmpxchg_futex_value_locked API futex: Remove redundant pagefault_disable in futex_atomic_cmpxchg_inatomic() futex: Avoid redudant evaluation of task_pid_vnr() futex: Update futex_wait_setup comments about locking
This commit is contained in:
Linus Torvalds
commit
b80cd62b7d
23 changed files with 404 additions and 276 deletions
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@ -31,15 +31,17 @@
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*
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* Simple ASCII art explanation:
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*
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* |HEAD |
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* | |
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* |prio_list.prev|<------------------------------------|
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* |prio_list.next|<->|pl|<->|pl|<--------------->|pl|<-|
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* |10 | |10| |21| |21| |21| |40| (prio)
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* | | | | | | | | | | | |
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* | | | | | | | | | | | |
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* |node_list.next|<->|nl|<->|nl|<->|nl|<->|nl|<->|nl|<-|
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* |node_list.prev|<------------------------------------|
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* pl:prio_list (only for plist_node)
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* nl:node_list
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* HEAD| NODE(S)
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* |
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* ||------------------------------------|
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* ||->|pl|<->|pl|<--------------->|pl|<-|
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* | |10| |21| |21| |21| |40| (prio)
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* | | | | | | | | | | |
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* | | | | | | | | | | |
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* |->|nl|<->|nl|<->|nl|<->|nl|<->|nl|<->|nl|<-|
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* |-------------------------------------------|
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*
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* The nodes on the prio_list list are sorted by priority to simplify
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* the insertion of new nodes. There are no nodes with duplicate
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@ -78,7 +80,6 @@
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#include <linux/spinlock_types.h>
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struct plist_head {
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struct list_head prio_list;
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struct list_head node_list;
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#ifdef CONFIG_DEBUG_PI_LIST
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raw_spinlock_t *rawlock;
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@ -88,7 +89,8 @@ struct plist_head {
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struct plist_node {
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int prio;
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struct plist_head plist;
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struct list_head prio_list;
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struct list_head node_list;
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};
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#ifdef CONFIG_DEBUG_PI_LIST
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@ -100,7 +102,6 @@ struct plist_node {
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#endif
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#define _PLIST_HEAD_INIT(head) \
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.prio_list = LIST_HEAD_INIT((head).prio_list), \
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.node_list = LIST_HEAD_INIT((head).node_list)
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/**
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@ -133,7 +134,8 @@ struct plist_node {
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#define PLIST_NODE_INIT(node, __prio) \
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{ \
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.prio = (__prio), \
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.plist = { _PLIST_HEAD_INIT((node).plist) }, \
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.prio_list = LIST_HEAD_INIT((node).prio_list), \
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.node_list = LIST_HEAD_INIT((node).node_list), \
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}
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/**
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@ -144,7 +146,6 @@ struct plist_node {
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static inline void
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plist_head_init(struct plist_head *head, spinlock_t *lock)
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{
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INIT_LIST_HEAD(&head->prio_list);
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INIT_LIST_HEAD(&head->node_list);
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#ifdef CONFIG_DEBUG_PI_LIST
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head->spinlock = lock;
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@ -160,7 +161,6 @@ plist_head_init(struct plist_head *head, spinlock_t *lock)
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static inline void
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plist_head_init_raw(struct plist_head *head, raw_spinlock_t *lock)
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{
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INIT_LIST_HEAD(&head->prio_list);
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INIT_LIST_HEAD(&head->node_list);
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#ifdef CONFIG_DEBUG_PI_LIST
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head->rawlock = lock;
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@ -176,7 +176,8 @@ plist_head_init_raw(struct plist_head *head, raw_spinlock_t *lock)
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static inline void plist_node_init(struct plist_node *node, int prio)
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{
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node->prio = prio;
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plist_head_init(&node->plist, NULL);
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INIT_LIST_HEAD(&node->prio_list);
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INIT_LIST_HEAD(&node->node_list);
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}
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extern void plist_add(struct plist_node *node, struct plist_head *head);
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@ -188,7 +189,7 @@ extern void plist_del(struct plist_node *node, struct plist_head *head);
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* @head: the head for your list
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*/
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#define plist_for_each(pos, head) \
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list_for_each_entry(pos, &(head)->node_list, plist.node_list)
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list_for_each_entry(pos, &(head)->node_list, node_list)
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/**
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* plist_for_each_safe - iterate safely over a plist of given type
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@ -199,7 +200,7 @@ extern void plist_del(struct plist_node *node, struct plist_head *head);
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* Iterate over a plist of given type, safe against removal of list entry.
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*/
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#define plist_for_each_safe(pos, n, head) \
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list_for_each_entry_safe(pos, n, &(head)->node_list, plist.node_list)
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list_for_each_entry_safe(pos, n, &(head)->node_list, node_list)
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/**
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* plist_for_each_entry - iterate over list of given type
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@ -208,7 +209,7 @@ extern void plist_del(struct plist_node *node, struct plist_head *head);
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* @mem: the name of the list_struct within the struct
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*/
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#define plist_for_each_entry(pos, head, mem) \
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list_for_each_entry(pos, &(head)->node_list, mem.plist.node_list)
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list_for_each_entry(pos, &(head)->node_list, mem.node_list)
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/**
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* plist_for_each_entry_safe - iterate safely over list of given type
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@ -220,7 +221,7 @@ extern void plist_del(struct plist_node *node, struct plist_head *head);
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* Iterate over list of given type, safe against removal of list entry.
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*/
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#define plist_for_each_entry_safe(pos, n, head, m) \
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list_for_each_entry_safe(pos, n, &(head)->node_list, m.plist.node_list)
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list_for_each_entry_safe(pos, n, &(head)->node_list, m.node_list)
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/**
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* plist_head_empty - return !0 if a plist_head is empty
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@ -237,7 +238,7 @@ static inline int plist_head_empty(const struct plist_head *head)
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*/
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static inline int plist_node_empty(const struct plist_node *node)
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{
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return plist_head_empty(&node->plist);
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return list_empty(&node->node_list);
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}
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/* All functions below assume the plist_head is not empty. */
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@ -285,7 +286,7 @@ static inline int plist_node_empty(const struct plist_node *node)
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static inline struct plist_node *plist_first(const struct plist_head *head)
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{
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return list_entry(head->node_list.next,
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struct plist_node, plist.node_list);
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struct plist_node, node_list);
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}
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/**
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@ -297,7 +298,7 @@ static inline struct plist_node *plist_first(const struct plist_head *head)
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static inline struct plist_node *plist_last(const struct plist_head *head)
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{
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return list_entry(head->node_list.prev,
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struct plist_node, plist.node_list);
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struct plist_node, node_list);
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}
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#endif
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