From 0788aa6a23cb9d693fc5040ec774b979f1e906cd Mon Sep 17 00:00:00 2001 From: Steven Rostedt Date: Thu, 6 Feb 2014 09:41:30 -0500 Subject: [PATCH] x86: Prepare removal of previous_esp from i386 thread_info structure The i386 thread_info contains a previous_esp field that is used to daisy chain the different stacks for dump_stack() (ie. irq, softirq, thread stacks). The goal is to eventual make i386 handling of thread_info the same as x86_64, which means that the thread_info will not be in the stack but as a per_cpu variable. We will no longer depend on thread_info being able to daisy chain different stacks as it will only exist in one location (the thread stack). By moving previous_esp to the end of thread_info and referencing it as an offset instead of using a thread_info field, this becomes a stepping stone to moving the thread_info. The offset to get to the previous stack is rather ugly in this patch, but this is only temporary and the prev_esp will be changed in the next commit. This commit is more for sanity checks of the change. Cc: Andrew Morton Cc: Peter Zijlstra Cc: Brian Gerst Cc: Robert Richter Signed-off-by: Steven Rostedt Link: http://lkml.kernel.org/r/20110806012353.891757693@goodmis.org Link: http://lkml.kernel.org/r/20140206144321.608754481@goodmis.org Signed-off-by: H. Peter Anvin --- Reading git-format-patch failed