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Masami Hiramatsu (Google)
49b0a3f605
When tracing the kernel local variables, sometimes we need to get the CPU local variables. To access it, current simple dereference is not enough. Thus, introduce a special this_cpu_read() dereference to access per-cpu variable for the current CPU (accessing other CPU variable may race with updates on other CPUs). Also this_cpu_ptr() is for accessing per-cpu pointer. Those are working as same as the kernel percpu macro. Link: https://lore.kernel.org/all/178271367680.1176915.4711734074448973989.stgit@devnote2/ Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>