On Fri, Oct 16, 2009 at 09:12:34AM +0800, wilbur.chan wrote:
> ppc 8270, kernel 2.6.21.7
>
> I took the following steps:
>
>
> In a system call function , say , sys_reboot, interrupt was disabled
> by local_irq_disable.
>
> Then , value at the address of 0xc50 was set to a value , say ,
>
2009/10/16, Benjamin Herrenschmidt :
> On Fri, 2009-10-16 at 09:12 +0800, wilbur.chan wrote:
>
>> static inline unsigned long local_irq_disable(void)
>> {
>> unsigned long flags, zero;
>>
>> __asm__ __volatile__("li %1,0; lbz %0,%2(13); stb %1,%2(13)"
>> : "=r" (flags), "=&r" (zero)
On Fri, 2009-10-16 at 09:12 +0800, wilbur.chan wrote:
> static inline unsigned long local_irq_disable(void)
> {
> unsigned long flags, zero;
>
> __asm__ __volatile__("li %1,0; lbz %0,%2(13); stb %1,%2(13)"
> : "=r" (flags), "=&r" (zero)
> : "i" (offsetof(struct paca_struct
ppc 8270, kernel 2.6.21.7
I took the following steps:
In a system call function , say , sys_reboot, interrupt was disabled
by local_irq_disable.
Then , value at the address of 0xc50 was set to a value , say ,
0x1234. Code was like this :
sys_reboot()
{
local_irq_disable();
*(volatile un
