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From: Peter Zijlstra <peterz@infradead.org>
To: x86@kernel.org
Cc: linux-kernel@vger.kernel.org, peterz@infradead.org,
	rdunlap@infradead.org, jpoimboe@redhat.com, sfr@canb.auug.org.au,
	tony.luck@intel.com
Subject: [PATCH 5/6] x86/mce: Remove explicit/superfluous tracing
Date: Wed, 06 Jan 2021 15:36:24 +0100	[thread overview]
Message-ID: <20210106144017.719310466@infradead.org> (raw)
In-Reply-To: 20210106143619.479313782@infradead.org

There's some explicit tracing left in exc_machine_check_kernel(),
remove it, as it's already implied by irqentry_nmi_enter().

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
 arch/x86/kernel/cpu/mce/core.c |    7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

--- a/arch/x86/kernel/cpu/mce/core.c
+++ b/arch/x86/kernel/cpu/mce/core.c
@@ -1992,10 +1992,9 @@ static __always_inline void exc_machine_
 	 * that out because it's an indirect call. Annotate it.
 	 */
 	instrumentation_begin();
-	trace_hardirqs_off_finish();
+
 	machine_check_vector(regs);
-	if (regs->flags & X86_EFLAGS_IF)
-		trace_hardirqs_on_prepare();
+
 	instrumentation_end();
 	irqentry_nmi_exit(regs, irq_state);
 }
@@ -2004,7 +2003,9 @@ static __always_inline void exc_machine_
 {
 	irqentry_enter_from_user_mode(regs);
 	instrumentation_begin();
+
 	machine_check_vector(regs);
+
 	instrumentation_end();
 	irqentry_exit_to_user_mode(regs);
 }



  parent reply	other threads:[~2021-01-06 14:45 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-06 14:36 [PATCH 0/6] x86 noinstr fixes Peter Zijlstra
2021-01-06 14:36 ` [PATCH 1/6] x86/entry: Fix noinstr fail Peter Zijlstra
2021-01-12 20:12   ` [tip: x86/urgent] " tip-bot2 for Peter Zijlstra
2021-01-06 14:36 ` [PATCH 2/6] x86/sev: Fix nonistr violation Peter Zijlstra
2021-01-06 17:59   ` Randy Dunlap
2021-01-07  9:36     ` Peter Zijlstra
2021-01-07 10:18       ` [PATCH 7/6] x86: __always_inline __{rd,wr}msr() Peter Zijlstra
2021-01-07 10:31         ` David Laight
2021-01-07 16:49         ` Randy Dunlap
2021-01-12 20:12   ` [tip: x86/urgent] x86/sev: Fix nonistr violation tip-bot2 for Peter Zijlstra
2021-01-06 14:36 ` [PATCH 3/6] locking/lockdep: Cure noinstr fail Peter Zijlstra
2021-01-12 20:12   ` [tip: x86/urgent] " tip-bot2 for Peter Zijlstra
2021-01-06 14:36 ` [PATCH 4/6] locking/lockdep: Avoid noinstr warning for DEBUG_LOCKDEP Peter Zijlstra
2021-01-12 20:12   ` [tip: x86/urgent] " tip-bot2 for Peter Zijlstra
2021-01-06 14:36 ` Peter Zijlstra [this message]
2021-01-12 20:12   ` [tip: x86/urgent] x86/mce: Remove explicit/superfluous tracing tip-bot2 for Peter Zijlstra
2021-01-06 14:36 ` [RFC][PATCH 6/6] x86/mce: Dont use noinstr for now Peter Zijlstra
2021-01-06 14:57   ` Boris Petkov
2021-01-07 10:06     ` Borislav Petkov
2021-01-07 12:58       ` Peter Zijlstra
2021-01-07 13:13         ` Borislav Petkov

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