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authorLinus Torvalds <torvalds@linux-foundation.org>2013-02-19 22:10:26 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2013-02-19 22:10:26 -0800
commitece8e0b2f9c980e5511fe8db2d68c6f1859b9d83 (patch)
tree70f1e3363080884965686576d079d24da8863a58 /include
parent67cb104b4c30bd52292b6a7f526349aab2dd5cbd (diff)
parenta0327ff0eda915be623658babacef706099c11a8 (diff)
Merge branch 'for-3.9-async' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq
Pull async changes from Tejun Heo: "These are followups for the earlier deadlock issue involving async ending up waiting for itself through block requesting module[1]. The following changes are made by these commits. - Instead of requesting default elevator on each request_queue init, block now requests it once early during boot. - Kmod triggers warning if invoked from an async worker. - Async synchronization implementation has been reimplemented. It's a lot simpler now." * 'for-3.9-async' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq: async: initialise list heads to fix crash async: replace list of active domains with global list of pending items async: keep pending tasks on async_domain and remove async_pending async: use ULLONG_MAX for infinity cookie value async: bring sanity to the use of words domain and running async, kmod: warn on synchronous request_module() from async workers block: don't request module during elevator init init, block: try to load default elevator module early during boot
Diffstat (limited to 'include')
-rw-r--r--include/linux/async.h9
-rw-r--r--include/linux/elevator.h5
-rw-r--r--include/linux/init.h1
3 files changed, 9 insertions, 6 deletions
diff --git a/include/linux/async.h b/include/linux/async.h
index 345169cfa304..a2e3f18b2ad6 100644
--- a/include/linux/async.h
+++ b/include/linux/async.h
@@ -19,8 +19,7 @@ typedef u64 async_cookie_t;
typedef void (async_func_ptr) (void *data, async_cookie_t cookie);
struct async_domain {
struct list_head node;
- struct list_head domain;
- int count;
+ struct list_head pending;
unsigned registered:1;
};
@@ -29,8 +28,7 @@ struct async_domain {
*/
#define ASYNC_DOMAIN(_name) \
struct async_domain _name = { .node = LIST_HEAD_INIT(_name.node), \
- .domain = LIST_HEAD_INIT(_name.domain), \
- .count = 0, \
+ .pending = LIST_HEAD_INIT(_name.pending), \
.registered = 1 }
/*
@@ -39,8 +37,7 @@ struct async_domain {
*/
#define ASYNC_DOMAIN_EXCLUSIVE(_name) \
struct async_domain _name = { .node = LIST_HEAD_INIT(_name.node), \
- .domain = LIST_HEAD_INIT(_name.domain), \
- .count = 0, \
+ .pending = LIST_HEAD_INIT(_name.pending), \
.registered = 0 }
extern async_cookie_t async_schedule(async_func_ptr *ptr, void *data);
diff --git a/include/linux/elevator.h b/include/linux/elevator.h
index c03af7687bb4..186620631750 100644
--- a/include/linux/elevator.h
+++ b/include/linux/elevator.h
@@ -138,6 +138,7 @@ extern void elv_drain_elevator(struct request_queue *);
/*
* io scheduler registration
*/
+extern void __init load_default_elevator_module(void);
extern int elv_register(struct elevator_type *);
extern void elv_unregister(struct elevator_type *);
@@ -206,5 +207,9 @@ enum {
INIT_LIST_HEAD(&(rq)->csd.list); \
} while (0)
+#else /* CONFIG_BLOCK */
+
+static inline void load_default_elevator_module(void) { }
+
#endif /* CONFIG_BLOCK */
#endif
diff --git a/include/linux/init.h b/include/linux/init.h
index 10ed4f436458..861814710d52 100644
--- a/include/linux/init.h
+++ b/include/linux/init.h
@@ -153,6 +153,7 @@ extern unsigned int reset_devices;
/* used by init/main.c */
void setup_arch(char **);
void prepare_namespace(void);
+void __init load_default_modules(void);
extern void (*late_time_init)(void);