Messages in this thread | | | Date | Mon, 2 Mar 2015 09:45:02 +0100 | From | Peter Zijlstra <> | Subject | Re: [PATCH 3/3] x86: do not save callee-preserved registers around lockdep_sys_exit_thunk |
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On Sun, Mar 01, 2015 at 08:16:18AM -0800, Andy Lutomirski wrote: > On Fri, Feb 27, 2015 at 4:29 PM, Denys Vlasenko <dvlasenk@redhat.com> wrote: > > Internally, lockdep_sys_exit_thunk saves callee-clobbered registers, > > and calls a C function, lockdep_sys_exix. Thus, callee-preserved > > won't be mangled, there is no need to save them. > > > > Patch was run-tested. > > Peterz, I think this was your code.
It was, I'm forever unsure on when what register are saved by which macros/functions.
Thanks!
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