On Mon, 18 Mar 2002, Guruprasad Baskaran wrote:
> while reading the source of the open system call I encountered
> the following macro in a function kmem_cache_alloc
> #define local_irq_save(x) __asm__ __volatile__ ("pushfl;
> popl %0; cli; ":"=g"(x)::"memory")
It saves eflags and then disables interrupts, the saving of eflags is in
order to restore the interrupt flag (IF bit in eflags) status upon return
with local_irq_restore. So eflags gets saved in 'x'
Zwane
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