The first patch makes sure that CAS can be assembled and the second patch adds the configurable possibility to use the CASA instruction rather than spinlock based emulation for atomic operations.
Andreas Larsson (2): sparc32,leon: Build with -mcpu=leon3 for SPARC_LEON sparc32,leon: Add support for atomic operations with CAS arch/sparc/Kconfig | 17 ++++- arch/sparc/Makefile | 10 ++- arch/sparc/include/asm/atomic_32.h | 55 ++++++++++++++- arch/sparc/include/asm/bitops_32.h | 13 ++++ arch/sparc/include/asm/cmpxchg_32.h | 37 ++++++++++ arch/sparc/lib/Makefile | 4 +- arch/sparc/lib/atomic_cas_32.S | 69 +++++++++++++++++++ arch/sparc/lib/bitops_cas_32.S | 130 ++++++++++++++++++++++++++++++++++++ 8 files changed, 326 insertions(+), 9 deletions(-) create mode 100644 arch/sparc/lib/atomic_cas_32.S create mode 100644 arch/sparc/lib/bitops_cas_32.S -- 2.8.0
