[PATCH 1/4] powerpc: Added __cmpdi2 for signed 64bit comparision

[Bhushan Bharat-R65777]

Oops it came as 1/4,
I am sorry, please ignore this

Thanks
-Bharat

> -----Original Message-----
> From: Bhushan Bharat-R65777
> Sent: Wednesday, October 09, 2013 10:39 AM
> To: Wood Scott-B07421; linuxppc-dev at lists.ozlabs.org; benh at kernel.crashing.org
> Cc: Bhushan Bharat-R65777; Bhushan Bharat-R65777
> Subject: [PATCH 1/4] powerpc: Added __cmpdi2 for signed 64bit comparision
> 
> This was missing on powerpc and I am getting compilation error
> drivers/vfio/pci/vfio_pci_rdwr.c:193: undefined reference to `__cmpdi2'
> drivers/vfio/pci/vfio_pci_rdwr.c:193: undefined reference to `__cmpdi2'
> 
> Signed-off-by: Bharat Bhushan <bharat.bhushan at freescale.com>
> ---
>  arch/powerpc/kernel/misc_32.S   |   14 ++++++++++++++
>  arch/powerpc/kernel/ppc_ksyms.c |    2 ++
>  2 files changed, 16 insertions(+), 0 deletions(-)
> 
> diff --git a/arch/powerpc/kernel/misc_32.S b/arch/powerpc/kernel/misc_32.S index
> 777d999..7c0eec2 100644
> --- a/arch/powerpc/kernel/misc_32.S
> +++ b/arch/powerpc/kernel/misc_32.S
> @@ -644,6 +644,20 @@ _GLOBAL(__lshrdi3)
>  	blr
> 
>  /*
> + * 64-bit comparison: __cmpdi2(s64 a, s64 b)
> + * Returns 0 if a < b, 1 if a == b, 2 if a > b.
> + */
> +_GLOBAL(__cmpdi2)
> +	cmpw	r3,r5
> +	li	r3,1
> +	bne	1f
> +	cmplw	r4,r6
> +	beqlr
> +1:	li	r3,0
> +	bltlr
> +	li	r3,2
> +	blr
> +/*
>   * 64-bit comparison: __ucmpdi2(u64 a, u64 b)
>   * Returns 0 if a < b, 1 if a == b, 2 if a > b.
>   */
> diff --git a/arch/powerpc/kernel/ppc_ksyms.c b/arch/powerpc/kernel/ppc_ksyms.c
> index 21646db..5674c00 100644
> --- a/arch/powerpc/kernel/ppc_ksyms.c
> +++ b/arch/powerpc/kernel/ppc_ksyms.c
> @@ -143,6 +143,8 @@ EXPORT_SYMBOL(__ashldi3);  EXPORT_SYMBOL(__lshrdi3);  int
> __ucmpdi2(unsigned long long, unsigned long long);  EXPORT_SYMBOL(__ucmpdi2);
> +int __cmpdi2(long long, long long);
> +EXPORT_SYMBOL(__cmpdi2);
>  #endif
>  long long __bswapdi2(long long);
>  EXPORT_SYMBOL(__bswapdi2);
> --
> 1.7.0.4