The following commit has been merged into the x86/urgent branch of tip: Commit-ID: 86402dcc894951c0a363b6aee12d955ff923b35e Gitweb: https://git.kernel.org/tip/86402dcc894951c0a363b6aee12d955ff923b35e Author: Josh Poimboeuf <jpoimboe@xxxxxxxxxx> AuthorDate: Fri, 05 Feb 2021 08:24:03 -06:00 Committer: Peter Zijlstra <peterz@xxxxxxxxxxxxx> CommitterDate: Wed, 03 Mar 2021 16:56:30 +01:00 x86/unwind/orc: Silence warnings caused by missing ORC data The ORC unwinder attempts to fall back to frame pointers when ORC data is missing for a given instruction. It sets state->error, but then tries to keep going as a best-effort type of thing. That may result in further warnings if the unwinder gets lost. Until we have some way to register generated code with the unwinder, missing ORC will be expected, and occasionally going off the rails will also be expected. So don't warn about it. Signed-off-by: Josh Poimboeuf <jpoimboe@xxxxxxxxxx> Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx> Tested-by: Ivan Babrou <ivan@xxxxxxxxxxxxxx> Link: https://lkml.kernel.org/r/06d02c4bbb220bd31668db579278b0352538efbb.1612534649.git.jpoimboe@xxxxxxxxxx --- arch/x86/kernel/unwind_orc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kernel/unwind_orc.c b/arch/x86/kernel/unwind_orc.c index 1bcc14c..a120253 100644 --- a/arch/x86/kernel/unwind_orc.c +++ b/arch/x86/kernel/unwind_orc.c @@ -13,7 +13,7 @@ #define orc_warn_current(args...) \ ({ \ - if (state->task == current) \ + if (state->task == current && !state->error) \ orc_warn(args); \ })
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