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async: make async a command line option for now

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... and have it default off.
This does allow people to work with it for testing.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
This commit is contained in:
Arjan van de Ven 2009-01-09 13:23:45 -08:00
parent b32714ba29
commit cdb80f630b
1 changed files with 14 additions and 2 deletions
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16
kernel/async.c
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@ -65,6 +65,8 @@ static LIST_HEAD(async_pending);
static LIST_HEAD(async_running); static LIST_HEAD(async_running);
static DEFINE_SPINLOCK(async_lock); static DEFINE_SPINLOCK(async_lock);
static int async_enabled = 0;
struct async_entry { struct async_entry {
struct list_head list; struct list_head list;
async_cookie_t cookie; async_cookie_t cookie;
@ -169,7 +171,7 @@ static async_cookie_t __async_schedule(async_func_ptr *ptr, void *data, struct l
* If we're out of memory or if there's too much work * If we're out of memory or if there's too much work
* pending already, we execute synchronously. * pending already, we execute synchronously.
*/ */
if (!entry || atomic_read(&entry_count) > MAX_WORK) { if (!async_enabled || !entry || atomic_read(&entry_count) > MAX_WORK) {
kfree(entry); kfree(entry);
spin_lock_irqsave(&async_lock, flags); spin_lock_irqsave(&async_lock, flags);
newcookie = next_cookie++; newcookie = next_cookie++;
@ -316,8 +318,18 @@ static int async_manager_thread(void *unused)
static int __init async_init(void) static int __init async_init(void)
{ {
kthread_run(async_manager_thread, NULL, "async/mgr"); if (async_enabled)
kthread_run(async_manager_thread, NULL, "async/mgr");
return 0; return 0;
} }
static int __init setup_async(char *str)
{
async_enabled = 1;
return 1;
}
__setup("fastboot", setup_async);
core_initcall(async_init); core_initcall(async_init);