• Russell King's avatar
    [ARM] Context switch improvements · 415395e1
    Russell King authored
     - We don't need to save the CPSR.
     - Rearrange thread_info members so we can pull the fields out of
       thread_info more efficiently.
     - Allocate a couple of extra words for CPU specific context saving
       (eg, for Xscale ACC registers)
     - Always leave 8 bytes free at the top of the kernel stack.  This
       prevents the stack becoming completely empty when do_exit() is
       called from an exiting nfsd() thread, and causing the wrong
       pointer to be returned from current_thread_info()
    415395e1
thread_info.h 3.48 KB