Re: [patch 18/39] remap_file_pages protection support: add VM_FAULT_SIGSEGV

Russell King
2005-08-15T10:15:55Z

On Mon, Aug 15, 2005 at 08:12:54PM +1000, Nick Piggin wrote:
> Well there is now, and that is we are now using a bit in the 2nd
> byte as flags. So I had to do away with -ve numbers there entirely.
>
> You could achieve a similar thing by using another bit in that byte
> #define VM_FAULT_FAILED 0x20
> and make that bit present in VM_FAULT_OOM and VM_FAULT_SIGBUS, then
> do an unlikely test for that bit in your handler and branch away to
> the slow path.

That'll do as well, thanks.