release/src-rt-6.x.4708/linux/linux-2.6.36/mm/percpu_up.c

   1 /*
   2  * mm/percpu_up.c - dummy percpu memory allocator implementation for UP
   3  */
   4
   5 #include <linux/module.h>
   6 #include <linux/percpu.h>
   7 #include <linux/slab.h>
   8
   9 void __percpu *__alloc_percpu(size_t size, size_t align)
  10 {
  11         /*
  12          * Can't easily make larger alignment work with kmalloc.  WARN
  13          * on it.  Larger alignment should only be used for module
  14          * percpu sections on SMP for which this path isn't used.
  15          */
  16         WARN_ON_ONCE(align > SMP_CACHE_BYTES);
  17         return (void __percpu __force *)kzalloc(size, GFP_KERNEL);
  18 }
  19 EXPORT_SYMBOL_GPL(__alloc_percpu);
  20
  21 void free_percpu(void __percpu *p)
  22 {
  23         kfree(this_cpu_ptr(p));
  24 }
  25 EXPORT_SYMBOL_GPL(free_percpu);
  26
  27 phys_addr_t per_cpu_ptr_to_phys(void *addr)
  28 {
  29         return __pa(addr);
  30 }