Function of check_irq_off()

["Vikram Auradkar" <vickyaur@xxxxxxxxx>]

What purpose does the routine check_irq_off defined in mm/slab serves?

-----SNIP------
/* About to mess with non-constant members - lock. */
       check_irq_off();
       spin_lock(&cachep->spinlock);
----SNIP------

Thanks,
Vicky

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