On Tue, 16 Oct 2007, Dave Hansen wrote:
> For the /proc/<pid>/pagemap code[1], we need to able to query how
> much virtual address space a particular task has. The trick is
> that we do it through /proc and can't use TASK_SIZE since it
> references "current" on some arches. The process opening the
> /proc file might be a 32-bit process opening a 64-bit process's
> pagemap file.
>
> x86_64 already has a TASK_SIZE_OF() macro:
>
> #define TASK_SIZE_OF(child) ((test_tsk_thread_flag(child, TIF_IA32)) ? IA32_PAGE_OFFSET : TASK_SIZE64)
>
> I'd like to have that for other architectures. So, add it
> for all the architectures that actually use "current" in
> their TASK_SIZE. For the others, just add a quick #define
> in sched.h to use plain old TASK_SIZE.
>
> 1. http://www.linuxworld.com/news/2007/042407-kernel.html
>
> - MIPS portion from Ralf Baechle <[email protected]>
>
> Signed-off-by: Dave Hansen <[email protected]>
> Signed-off-by: Ralf Baechle <[email protected]>
> Signed-off-by: Matt Mackall <[email protected]>
Acked-by: David Rientjes <[email protected]>
-
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