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| author | Vegard Nossum <vegard.nossum@gmail.com> | 2009-04-07 10:55:38 +0200 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2009-04-07 16:24:54 -0400 |
| commit | 5d38258ec026921a7b266f4047ebeaa75db358e5 (patch) | |
| tree | 899c26f6e0b63d9de56d2989b97d5da4737390e9 /drivers/acpi/battery.c | |
| parent | a3c270561ea4455cbcea0ac2b53335655d9fc805 (diff) | |
| download | linux-stable-5d38258ec026921a7b266f4047ebeaa75db358e5.tar.gz linux-stable-5d38258ec026921a7b266f4047ebeaa75db358e5.tar.bz2 linux-stable-5d38258ec026921a7b266f4047ebeaa75db358e5.zip | |
ACPI battery: fix async boot oops
> BUG: unable to handle kernel NULL pointer dereference at (null)
What happens is that the battery module's init sections are being freed
before the async callback (which was marked __init) has run. This theory
is supported by the fact that the bad RIP value is a vmalloc address.
The immediate fix is to make this a non-init call.
(A better long-term fix is of course to wait with init-section unloading
until a module's async initcalls have been run, which would allow us to
discard this function which is still only run once, after all. Perhaps a
new async_initcall() function for the async/module API, if this is needed
for other modules in the future?)
Reported-by: Arkadiusz Miskiewicz <a.miskiewicz@gmail.com>
Signed-off-by: Vegard Nossum <vegard.nossum@gmail.com>
Tested-by: Alessandro Suardi <alessandro.suardi@gmail.com>
Tested-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/battery.c')
| -rw-r--r-- | drivers/acpi/battery.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c index b0de6312919a..3c7d8942f23b 100644 --- a/drivers/acpi/battery.c +++ b/drivers/acpi/battery.c @@ -903,7 +903,7 @@ static struct acpi_driver acpi_battery_driver = { }, }; -static void __init acpi_battery_init_async(void *unused, async_cookie_t cookie) +static void acpi_battery_init_async(void *unused, async_cookie_t cookie) { if (acpi_disabled) return; |