On Sun, Apr 16, 2006 at 09:40:04AM -0400, Steven Rostedt wrote: > The per_cpu variables are defined with the macro > DEFINE_PER_CPU(type, var) > > This macro just places the variable into the section .data.percpu and > prepends the prefix "per_cpu__" to the variable. > > To use this variable in another .c file the declaration is used by the > macro > DECLARE_PER_CPU(type, var) > > This macro is simply the extern declaration of the variable with the > prefix added. Suprisingly this macro shows up in ~19 .c files. Only valid usage is forward declaration of a later static definition with DEFINE_PER_CPU. arch/m32r/kernel/smp.c + arch/m32r/kernel/smpboot.c is jsut one example. Just a random comment not related to Steven's patches. Sam
