linux-kernel - [PATCH 3/6] perf: Fix get_recursion

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Message-ID: <20201030151955.120572175@infradead.org>
Date:   Fri, 30 Oct 2020 16:13:48 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     mingo@...nel.org, tglx@...utronix.de, rostedt@...dmis.org
Cc:     linux-kernel@...r.kernel.org, kan.liang@...ux.intel.com,
        acme@...nel.org, mark.rutland@....com,
        alexander.shishkin@...ux.intel.com, jolsa@...hat.com,
        namhyung@...nel.org, ak@...ux.intel.com, eranian@...gle.com,
        peterz@...radead.org
Subject: [PATCH 3/6] perf: Fix get_recursion_context()

One should use in_server_softirq() to detector SoftIRQ context.

Fixes: 96f6d4444302 ("perf_counter: avoid recursion")
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
---
 kernel/events/internal.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/kernel/events/internal.h
+++ b/kernel/events/internal.h
@@ -211,7 +211,7 @@ static inline int get_recursion_context(
 		rctx = 3;
 	else if (in_irq())
 		rctx = 2;
-	else if (in_softirq())
+	else if (in_serving_softirq())
 		rctx = 1;
 	else
 		rctx = 0;