linux-kernel - [tip: perf/urgent] perf: Fix get_recursion

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Date:   Tue, 10 Nov 2020 12:45:21 -0000
From:   "tip-bot2 for Peter Zijlstra" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     "Peter Zijlstra (Intel)" <peterz@...radead.org>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: perf/urgent] perf: Fix get_recursion_context()

The following commit has been merged into the perf/urgent branch of tip:

Commit-ID:     ce0f17fc93f63ee91428af10b7b2ddef38cd19e5
Gitweb:        https://git.kernel.org/tip/ce0f17fc93f63ee91428af10b7b2ddef38cd19e5
Author:        Peter Zijlstra <peterz@...radead.org>
AuthorDate:    Fri, 30 Oct 2020 12:49:45 +01:00
Committer:     Peter Zijlstra <peterz@...radead.org>
CommitterDate: Mon, 09 Nov 2020 18:12:34 +01:00

perf: Fix get_recursion_context()

One should use in_serving_softirq() to detect SoftIRQ context.

Fixes: 96f6d4444302 ("perf_counter: avoid recursion")
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Link: https://lkml.kernel.org/r/20201030151955.120572175@infradead.org
---
 kernel/events/internal.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/events/internal.h b/kernel/events/internal.h
index fcbf561..402054e 100644
--- a/kernel/events/internal.h
+++ b/kernel/events/internal.h
@@ -211,7 +211,7 @@ static inline int get_recursion_context(int *recursion)
 		rctx = 3;
 	else if (in_irq())
 		rctx = 2;
-	else if (in_softirq())
+	else if (in_serving_softirq())
 		rctx = 1;
 	else
 		rctx = 0;