On Mon, Jul 14, 2014 at 03:39:38PM +0100, Guenter Roeck wrote: > On 07/14/2014 07:22 AM, Catalin Marinas wrote: > > On Sun, Jul 13, 2014 at 04:30:31PM +0100, Guenter Roeck wrote: > >> Implementing a restart handler in a module don't make sense > >> as there would be no guarantee that the module is loaded when > >> a restart is needed. Unexport arm_pm_restart to ensure that > >> no one gets the idea to do it anyway. > >> > >> Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx> > >> --- > >> v4: No change > >> v3: No change > >> v2: No change > >> > >> arch/arm/kernel/process.c | 1 - > >> arch/arm64/kernel/process.c | 1 - > >> 2 files changed, 2 deletions(-) > >> > >> diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c > >> index 5d191e3..25c7f00 100644 > >> --- a/arch/arm/kernel/process.c > >> +++ b/arch/arm/kernel/process.c > >> @@ -125,7 +125,6 @@ void (*pm_power_off)(void); > >> EXPORT_SYMBOL(pm_power_off); > >> > >> void (*arm_pm_restart)(enum reboot_mode reboot_mode, const char *cmd) = null_restart; > >> -EXPORT_SYMBOL_GPL(arm_pm_restart); > > > > Unless I miss something, how is this different from registering a > > restart notifier from a module (blocking_notifier_chain_register is > > exported)? > > A notifier can be unregistered safely, and more than one notifier call > is supported. If there is more than one driver setting arm_pm_restart, > the first one to unregister will clear the pointer. Using the notifier > is cleaner and not architecture dependent. One might argue that setting > module external function pointers from module code isn't exactly clean > coding. I agree. > Anyway, this patch is not relevant for the series. If you prefer to have > the function exported, and keep using it for arm drivers loaded as modules, > be my guest, and I'll be more than happy drop it. I'll take your comment > as a hint _not_ to convert existing code to use the notifier after the > series is accepted. Cool, as I hate wasting my time. No, it's actually the opposite ;) (and I would go further and remove arm_pm_restart entirely for arm64). -- Catalin -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
