From: David Howells <dhowells@xxxxxxxxxx>
Date: Tue, 18 May 2010 17:45:42 +0100
> Where the value of current is kept in a register, that register can be marked
> such that the pointer value is read only, e.g.:
>
> register struct task_struct *const current asm("e2");
>
> This prevents inadvertent assignment outside of assembly code.
>
> This has been available on the MN10300 arch for a while now, and I've also
> tested it on the FRV arch.
>
> Signed-off-by: David Howells <dhowells@xxxxxxxxxx>
Acked-by: David S. Miller <davem@xxxxxxxxxxxxx>
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