[PATCH 03/14] powerpc: Make create_branch() return errors if the branch target is too large

[Kumar Gala]

On Jun 23, 2008, at 8:32 PM, Michael Ellerman wrote:

> If you pass a target value to create_branch() which is more than  
> 32MB - 4,
> or - 32MB away from the branch site, then it's impossible to create an
> immediate branch. The current code doesn't check, which will lead to  
> us
> creating a branch to somewhere else - which is bad.
>
> For code that cares to check we return 0, which is easy to check  
> for, and
> for code that doesn't at least we'll be creating an illegal  
> instruction,
> rather than a branch to some random address.
>
> Signed-off-by: Michael Ellerman <michael at ellerman.id.au>

Acked-by: Kumar Gala <galak at kernel.crashing.org>

- k