On 06/09/2017 20:26, Paul Burton wrote:
> This series makes a bunch of cleanups & improvements to the cmpxchg() &
> xchg() macros & functions, allowing them to be used on values smaller
> than 4 bytes, then switches MIPS over to use generic queued spinlocks &
> queued read/write locks.
>
> Applies atop v4.12-rc4.
>
> Paul Burton (11):
> MIPS: cmpxchg: Unify R10000_LLSC_WAR & non-R10000_LLSC_WAR cases
> MIPS: cmpxchg: Pull xchg() asm into a macro
> MIPS: cmpxchg: Use __compiletime_error() for bad cmpxchg() pointers
> MIPS: cmpxchg: Error out on unsupported xchg() calls
> MIPS: cmpxchg: Drop __xchg_u{32,64} functions
> MIPS: cmpxchg: Implement __cmpxchg() as a function
> MIPS: cmpxchg: Implement 1 byte & 2 byte xchg()
> MIPS: cmpxchg: Implement 1 byte & 2 byte cmpxchg()
> MIPS: cmpxchg: Rearrange __xchg() arguments to match xchg()
> MIPS: Use queued read/write locks (qrwlock)
> MIPS: Use queued spinlocks (qspinlock)
>
> arch/mips/Kconfig | 2 +
> arch/mips/include/asm/Kbuild | 2 +
> arch/mips/include/asm/cmpxchg.h | 280 ++++++++++------------
> arch/mips/include/asm/spinlock.h | 426 +--------------------------------
> arch/mips/include/asm/spinlock_types.h | 34 +--
> arch/mips/kernel/Makefile | 2 +-
> arch/mips/kernel/cmpxchg.c | 109 +++++++++
> 7 files changed, 239 insertions(+), 616 deletions(-)
> create mode 100644 arch/mips/kernel/cmpxchg.c
FWIW, I've been running this patchset, along with the cpu_has_* patches, on my
SGI Octane for two weeks now, constantly compiling code, and haven't seen any
issues thus far.
Tested-by: Joshua Kinard <kumba@xxxxxxxxxx>
