[2/2] powerpc/signal: Add helper function to fetch quad word aligned pointer

[Michael Ellerman]

On Mon, 2015-06-07 at 10:25:34 UTC, Anshuman Khandual wrote:
> This patch adds one helper function 'vmx_reserve_addr' which computes
> quad word aligned pointer for vmx_reserve array element in sigcontext
> structure making the code more readable.
> 
> Signed-off-by: Anshuman Khandual <khandual at linux.vnet.ibm.com>
> ---
>  arch/powerpc/kernel/signal_64.c | 14 +++++++++-----
>  1 file changed, 9 insertions(+), 5 deletions(-)
> 
> diff --git a/arch/powerpc/kernel/signal_64.c b/arch/powerpc/kernel/signal_64.c
> index c7c24d2..e8762f5 100644
> --- a/arch/powerpc/kernel/signal_64.c
> +++ b/arch/powerpc/kernel/signal_64.c
> @@ -73,6 +73,12 @@ static const char fmt32[] = KERN_INFO \
>  static const char fmt64[] = KERN_INFO \
>  	"%s[%d]: bad frame in %s: %016lx nip %016lx lr %016lx\n";
>  
> +static elf_vrreg_t __user *vmx_reserve_addr(struct sigcontext __user *sc)
> +{
> +		return (elf_vrreg_t __user *)
> +			(((unsigned long)sc->vmx_reserve + 15) & ~0xful);

You have more tabs here than you need. Please put it on one line, I don't care
if it's a bit more than 80 chars.

Please add a comment describing what it's doing and why.

Also I think I'd prefer if it was named sigcontext_vmx_regs() or something more
like that, ie. it's about sigcontext primarily.

cheers