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Date: Fri, 27 Jan 2012 01:02:08 +0200
From: "Kasatkin, Dmitry" <dmitry.kasatkin@...el.com>
To: David Miller <davem@...emloft.net>
Cc: sparclinux@...r.kernel.org, viro@...iv.linux.org.uk,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] lib: Fix multiple definitions of clz_tab
On Fri, Jan 27, 2012 at 12:32 AM, David Miller <davem@...emloft.net> wrote:
>
> Both sparc 32-bit's software divide assembler and MPILIB provide
> clz_tab[] with identical contents.
>
> Break it out into a seperate object file and select it when
> SPARC32 or MPILIB is set.
>
> Reported-by: Al Viro <viro@...IV.linux.org.uk>
> Signed-off-by: David S. Miller <davem@...emloft.net>
> ---
> arch/sparc/Kconfig | 1 +
> arch/sparc/lib/divdi3.S | 16 +---------------
> lib/Kconfig | 4 ++++
> lib/Makefile | 2 ++
> lib/clz_tab.c | 18 ++++++++++++++++++
> lib/mpi/mpi-bit.c | 19 -------------------
> 6 files changed, 26 insertions(+), 34 deletions(-)
> create mode 100644 lib/clz_tab.c
>
> diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
> index 9665799..ca5580e 100644
> --- a/arch/sparc/Kconfig
> +++ b/arch/sparc/Kconfig
> @@ -33,6 +33,7 @@ config SPARC
> config SPARC32
> def_bool !64BIT
> select GENERIC_ATOMIC64
> + select CLZ_TAB
>
> config SPARC64
> def_bool 64BIT
> diff --git a/arch/sparc/lib/divdi3.S b/arch/sparc/lib/divdi3.S
> index 681b368..d74bc09 100644
> --- a/arch/sparc/lib/divdi3.S
> +++ b/arch/sparc/lib/divdi3.S
> @@ -17,23 +17,9 @@ along with GNU CC; see the file COPYING. If not, write to
> the Free Software Foundation, 59 Temple Place - Suite 330,
> Boston, MA 02111-1307, USA. */
>
> - .data
> - .align 8
> - .globl __clz_tab
> -__clz_tab:
> - .byte 0,1,2,2,3,3,3,3,4,4,4,4,4,4,4,4,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5
> - .byte 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6
> - .byte 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7
> - .byte 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7
> - .byte 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8
> - .byte 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8
> - .byte 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8
> - .byte 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8
> - .size __clz_tab,256
> - .global .udiv
> -
> .text
> .align 4
> + .global .udiv
> .globl __divdi3
> __divdi3:
> save %sp,-104,%sp
> diff --git a/lib/Kconfig b/lib/Kconfig
> index 169eb7c..d69d321 100644
> --- a/lib/Kconfig
> +++ b/lib/Kconfig
> @@ -279,6 +279,9 @@ config AVERAGE
>
> If unsure, say N.
>
> +config CLZ_TAB
> + bool
> +
> config CORDIC
> tristate "CORDIC algorithm"
> help
> @@ -287,6 +290,7 @@ config CORDIC
>
> config MPILIB
> tristate
> + select CLZ_TAB
> help
> Multiprecision maths library from GnuPG.
> It is used to implement RSA digital signature verification,
> diff --git a/lib/Makefile b/lib/Makefile
> index d71aae1..18515f0 100644
> --- a/lib/Makefile
> +++ b/lib/Makefile
> @@ -121,6 +121,8 @@ obj-$(CONFIG_DQL) += dynamic_queue_limits.o
> obj-$(CONFIG_MPILIB) += mpi/
> obj-$(CONFIG_SIGNATURE) += digsig.o
>
> +obj-$(CONFIG_CLZ_TAB) += clz_tab.o
> +
> hostprogs-y := gen_crc32table
> clean-files := crc32table.h
>
> diff --git a/lib/clz_tab.c b/lib/clz_tab.c
> new file mode 100644
> index 0000000..7287b4a
> --- /dev/null
> +++ b/lib/clz_tab.c
> @@ -0,0 +1,18 @@
> +const unsigned char __clz_tab[] = {
> + 0, 1, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5,
> + 5, 5, 5, 5, 5, 5, 5, 5,
> + 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
> + 6, 6, 6, 6, 6, 6, 6, 6,
> + 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
> + 7, 7, 7, 7, 7, 7, 7, 7,
> + 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
> + 7, 7, 7, 7, 7, 7, 7, 7,
> + 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
> + 8, 8, 8, 8, 8, 8, 8, 8,
> + 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
> + 8, 8, 8, 8, 8, 8, 8, 8,
> + 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
> + 8, 8, 8, 8, 8, 8, 8, 8,
> + 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
> + 8, 8, 8, 8, 8, 8, 8, 8,
> +};
> diff --git a/lib/mpi/mpi-bit.c b/lib/mpi/mpi-bit.c
> index 854c9c6..2f52662 100644
> --- a/lib/mpi/mpi-bit.c
> +++ b/lib/mpi/mpi-bit.c
> @@ -21,25 +21,6 @@
> #include "mpi-internal.h"
> #include "longlong.h"
>
> -const unsigned char __clz_tab[] = {
> - 0, 1, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5,
> - 5, 5, 5, 5, 5, 5, 5, 5,
> - 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
> - 6, 6, 6, 6, 6, 6, 6, 6,
> - 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
> - 7, 7, 7, 7, 7, 7, 7, 7,
> - 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
> - 7, 7, 7, 7, 7, 7, 7, 7,
> - 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
> - 8, 8, 8, 8, 8, 8, 8, 8,
> - 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
> - 8, 8, 8, 8, 8, 8, 8, 8,
> - 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
> - 8, 8, 8, 8, 8, 8, 8, 8,
> - 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
> - 8, 8, 8, 8, 8, 8, 8, 8,
> -};
> -
> #define A_LIMB_1 ((mpi_limb_t) 1)
>
> /****************
> --
> 1.7.6.401.g6a319
>
Nice...
How should I deal with your patches?
I send patches via LSM list. James Morris applies them.
Should I re-send them along with my patches?
- Dmitry
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