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| author | Arjan van de Ven <arjan@linux.intel.com> | 2009-01-07 16:45:46 (GMT) |
|---|---|---|
| committer | Arjan van de Ven <arjan@linux.intel.com> | 2009-01-07 16:45:46 (GMT) |
| commit | 22a9d645677feefd402befd02edd59b122289ef1 (patch) | |
| tree | 9f1215cc8f7f0e1c36b03882b2926cc26ccfa5ff /kernel/module.c | |
| parent | ede6f5aea054d3fb67c78857f7abdee602302043 (diff) | |
| download | linux-fsl-qoriq-22a9d645677feefd402befd02edd59b122289ef1.tar.xz | |
async: Asynchronous function calls to speed up kernel boot
Right now, most of the kernel boot is strictly synchronous, such that
various hardware delays are done sequentially.
In order to make the kernel boot faster, this patch introduces
infrastructure to allow doing some of the initialization steps
asynchronously, which will hide significant portions of the hardware delays
in practice.
In order to not change device order and other similar observables, this
patch does NOT do full parallel initialization.
Rather, it operates more in the way an out of order CPU does; the work may
be done out of order and asynchronous, but the observable effects
(instruction retiring for the CPU) are still done in the original sequence.
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Diffstat (limited to 'kernel/module.c')
| -rw-r--r-- | kernel/module.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/module.c b/kernel/module.c index 496dcb5..c9332c9 100644 --- a/kernel/module.c +++ b/kernel/module.c @@ -50,6 +50,7 @@ #include <asm/sections.h> #include <linux/tracepoint.h> #include <linux/ftrace.h> +#include <linux/async.h> #if 0 #define DEBUGP printk @@ -816,6 +817,7 @@ sys_delete_module(const char __user *name_user, unsigned int flags) mod->exit(); blocking_notifier_call_chain(&module_notify_list, MODULE_STATE_GOING, mod); + async_synchronize_full(); mutex_lock(&module_mutex); /* Store the name of the last unloaded module for diagnostic purposes */ strlcpy(last_unloaded_module, mod->name, sizeof(last_unloaded_module)); |