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  • Christoph Lameter's avatar
    x86: this_cpu_cmpxchg and this_cpu_xchg operations · 7296e08a
    Christoph Lameter authored
    
    
    Provide support as far as the hardware capabilities of the x86 cpus
    allow.
    
    Define CONFIG_CMPXCHG_LOCAL in Kconfig.cpu to allow core code to test for
    fast cpuops implementations.
    
    V1->V2:
    	- Take out the definition for this_cpu_cmpxchg_8 and move it into
    	  a separate patch.
    
    tj: - Reordered ops to better follow this_cpu_* organization.
        - Renamed macro temp variables similar to their existing
          neighbours.
    
    Signed-off-by: default avatarChristoph Lameter <cl@linux.com>
    Signed-off-by: default avatarTejun Heo <tj@kernel.org>
    7296e08a