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    linker script: define __per_cpu_load on all SMP capable archs · 19390c4d
    Tejun Heo 提交于
    Impact: __per_cpu_load available on all SMP capable archs
    
    Percpu now requires three symbols to be defined - __per_cpu_load,
    __per_cpu_start and __per_cpu_end.  There were three archs which
    didn't have it.  Update them as follows.
    
    * powerpc: can use generic PERCPU() macro.  Compile tested for
      powerpc32, compile/boot tested for powerpc64.
    
    * ia64: can use generic PERCPU_VADDR() macro.  __phys_per_cpu_start is
      identical to __per_cpu_load.  Compile tested and symbol table looks
      identical after the change except for the additional __per_cpu_load.
    
    * arm: added explicit __per_cpu_load definition.  Currently uses
      unified .init output section so can't use the generic macro.  Dunno
      whether the unified .init ouput section is required by arch
      peculiarity so I left it alone.  Please break it up and use PERCPU()
      if possible.
    Signed-off-by: NTejun Heo <tj@kernel.org>
    Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
    Cc: Pat Gefre <pfg@sgi.com>
    Cc: Russell King <rmk@arm.linux.org.uk>
    19390c4d
vmlinux.lds.S 7.0 KB