Re: [PATCH 07/22] openrisc: add atomic bitops

From: Stafford Horne
Date: Sun Jan 15 2017 - 03:35:48 EST

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In reply to: kbuild test robot: "Re: [PATCH 07/22] openrisc: add atomic bitops"
Next in thread: Stafford Horne: "[PATCH 09/22] openrisc: add optimized atomic operations"
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Hello,

On Sun, Jan 15, 2017 at 01:42:56PM +0800, kbuild test robot wrote:
> Hi Stefan,
>
> [auto build test ERROR on linus/master]
> [also build test ERROR on v4.10-rc3 next-20170113]
> [if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
>
> url: https://github.com/0day-ci/linux/commits/Stafford-Horne/Openrisc-patchees-from-backlog-for-4-11/20170115-121623
> config: openrisc-or1ksim_defconfig (attached as .config)
> compiler: or32-linux-gcc (GCC) 4.5.1-or32-1.0rc1
> reproduce:
> wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
> chmod +x ~/bin/make.cross
> # save the attached .config to linux build tree
> make.cross ARCH=openrisc
>
> All errors (new ones prefixed by >>):
>
> arch/openrisc/include/asm/bitops/atomic.h: Assembler messages:
> >> arch/openrisc/include/asm/bitops/atomic.h:70: Error: unknown opcode2 `l.lwa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:72: Error: unknown opcode2 `l.swa'.
> --
> arch/openrisc/include/asm/bitops/atomic.h: Assembler messages:
> >> arch/openrisc/include/asm/bitops/atomic.h:70: Error: unknown opcode2 `l.lwa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:72: Error: unknown opcode2 `l.swa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:70: Error: unknown opcode2 `l.lwa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:72: Error: unknown opcode2 `l.swa'.
> --
> arch/openrisc/include/asm/bitops/atomic.h: Assembler messages:
> arch/openrisc/include/asm/bitops/atomic.h:90: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:92: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:18: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:20: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:90: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:92: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:35: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:37: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:35: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:37: Error: unknown opcode2 `l.swa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:70: Error: unknown opcode2 `l.lwa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:72: Error: unknown opcode2 `l.swa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:70: Error: unknown opcode2 `l.lwa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:72: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:90: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:92: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:90: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:92: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:18: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:20: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:18: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:20: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:90: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:92: Error: unknown opcode2 `l.swa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:70: Error: unknown opcode2 `l.lwa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:72: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:35: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:37: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:18: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:20: Error: unknown opcode2 `l.swa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:70: Error: unknown opcode2 `l.lwa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:72: Error: unknown opcode2 `l.swa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:70: Error: unknown opcode2 `l.lwa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:72: Error: unknown opcode2 `l.swa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:70: Error: unknown opcode2 `l.lwa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:72: Error: unknown opcode2 `l.swa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:70: Error: unknown opcode2 `l.lwa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:72: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:35: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:37: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:18: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:20: Error: unknown opcode2 `l.swa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:70: Error: unknown opcode2 `l.lwa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:72: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:90: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:92: Error: unknown opcode2 `l.swa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:70: Error: unknown opcode2 `l.lwa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:72: Error: unknown opcode2 `l.swa'.
> net/core/dev.c: In function 'validate_xmit_skb_list':
> net/core/dev.c:2989:39: warning: 'tail' may be used uninitialized in this function
> arch/openrisc/include/asm/bitops/atomic.h:35: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:37: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:18: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:20: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:18: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:20: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:35: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:37: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:18: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:20: Error: unknown opcode2 `l.swa'.
> --
> arch/openrisc/include/asm/bitops/atomic.h: Assembler messages:
> arch/openrisc/include/asm/bitops/atomic.h:35: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:37: Error: unknown opcode2 `l.swa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:70: Error: unknown opcode2 `l.lwa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:72: Error: unknown opcode2 `l.swa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:70: Error: unknown opcode2 `l.lwa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:72: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:35: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:37: Error: unknown opcode2 `l.swa'.
> --
> arch/openrisc/include/asm/bitops/atomic.h: Assembler messages:
> arch/openrisc/include/asm/bitops/atomic.h:35: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:37: Error: unknown opcode2 `l.swa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:70: Error: unknown opcode2 `l.lwa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:72: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:90: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:92: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:18: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:20: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:18: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:20: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:35: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:37: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:18: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:20: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:90: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:92: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:35: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:37: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:18: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:20: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:18: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:20: Error: unknown opcode2 `l.swa'.
> --
> arch/openrisc/include/asm/bitops/atomic.h: Assembler messages:
> arch/openrisc/include/asm/bitops/atomic.h:18: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:20: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:18: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:20: Error: unknown opcode2 `l.swa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:70: Error: unknown opcode2 `l.lwa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:72: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:90: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:92: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:90: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:92: Error: unknown opcode2 `l.swa'.
> --
> arch/openrisc/include/asm/bitops/atomic.h: Assembler messages:
> arch/openrisc/include/asm/bitops/atomic.h:18: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:20: Error: unknown opcode2 `l.swa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:70: Error: unknown opcode2 `l.lwa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:72: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:35: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:37: Error: unknown opcode2 `l.swa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:70: Error: unknown opcode2 `l.lwa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:72: Error: unknown opcode2 `l.swa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:70: Error: unknown opcode2 `l.lwa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:72: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:35: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:37: Error: unknown opcode2 `l.swa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:70: Error: unknown opcode2 `l.lwa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:72: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:35: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:37: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:18: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:20: Error: unknown opcode2 `l.swa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:70: Error: unknown opcode2 `l.lwa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:72: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:35: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:37: Error: unknown opcode2 `l.swa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:70: Error: unknown opcode2 `l.lwa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:72: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:18: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:20: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:18: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:20: Error: unknown opcode2 `l.swa'.
> --
> arch/openrisc/include/asm/bitops/atomic.h: Assembler messages:
> arch/openrisc/include/asm/bitops/atomic.h:35: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:37: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:35: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:37: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:35: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:37: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:35: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:37: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:35: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:37: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:18: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:20: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:90: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:92: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:35: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:37: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:35: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:37: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:90: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:92: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:18: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:20: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:18: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:20: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:18: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:20: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:18: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:20: Error: unknown opcode2 `l.swa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:70: Error: unknown opcode2 `l.lwa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:72: Error: unknown opcode2 `l.swa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:70: Error: unknown opcode2 `l.lwa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:72: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:90: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:92: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:18: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:20: Error: unknown opcode2 `l.swa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:70: Error: unknown opcode2 `l.lwa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:72: Error: unknown opcode2 `l.swa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:70: Error: unknown opcode2 `l.lwa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:72: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:18: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:20: Error: unknown opcode2 `l.swa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:70: Error: unknown opcode2 `l.lwa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:72: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:18: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:20: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:18: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:20: Error: unknown opcode2 `l.swa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:70: Error: unknown opcode2 `l.lwa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:72: Error: unknown opcode2 `l.swa'.
> --
> arch/openrisc/include/asm/bitops/atomic.h: Assembler messages:
> >> arch/openrisc/include/asm/bitops/atomic.h:70: Error: unknown opcode2 `l.lwa'.
> >> arch/openrisc/include/asm/bitops/atomic.h:72: Error: unknown opcode2 `l.swa'.
> arch/openrisc/include/asm/bitops/atomic.h:18: Error: unknown opcode2 `l.lwa'.
> arch/openrisc/include/asm/bitops/atomic.h:20: Error: unknown opcode2 `l.swa'.
>
> vim +70 arch/openrisc/include/asm/bitops/atomic.h
>
> 64 {
> 65 unsigned long mask = BIT_MASK(nr);
> 66 unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr);
> 67 unsigned long old;
> 68 unsigned long tmp;
> 69
> > 70 __asm__ __volatile__(
> 71 "1: l.lwa %0,0(%2) \n"
> > 72 " l.or %1,%0,%3 \n"
> 73 " l.swa 0(%2),%1 \n"
> 74 " l.bnf 1b \n"
> 75 " l.nop \n"
>

All of these are due to the lwa/swa instructions. A toolchain from the
last 2 years would be needed to build these instructions. Can I suggest
that the test chain be updated? I would suggest musl. But there are
currently two options openrisc team is maintaining.

:: or1k-musl-linux- chain ::

Get it here:
https://github.com/openrisc/or1k-gcc/tree/musl-5.4.0/gcc
- build using
https://github.com/openrisc/musl-cross
(would suggest my pull request - will merge soon
https://github.com/openrisc/musl-cross/pull/1)

:: or1k-elf- chain ::

Get it here:
https://github.com/openrisc/or1k-gcc/tree/or1k-5.4.0/gcc
- build using baremetal/newlib
https://github.com/openrisc/newlib
- instructions
http://openrisc.io/newlib/building.html

- Stafford

Next message: Stafford Horne: "Re: [PATCH 00/22] Openrisc patchees from backlog for 4.11"
Previous message: Ingo Molnar: "Re: [PATCH tip/core/rcu 2/3] srcu: Force full grace-period ordering"
In reply to: kbuild test robot: "Re: [PATCH 07/22] openrisc: add atomic bitops"
Next in thread: Stafford Horne: "[PATCH 09/22] openrisc: add optimized atomic operations"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]