linux-kernel - [tip: perf/core] perf/core: Allow kernel address filter when not filtering the kernel

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Date:   Thu, 03 Feb 2022 14:33:27 -0000
From:   "tip-bot2 for Adrian Hunter" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Adrian Hunter <adrian.hunter@...el.com>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: perf/core] perf/core: Allow kernel address filter when not
 filtering the kernel

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

Commit-ID:     58b2ff2c18b1e1d7232b8007a5698ec4ee7a7a0d
Gitweb:        https://git.kernel.org/tip/58b2ff2c18b1e1d7232b8007a5698ec4ee7a7a0d
Author:        Adrian Hunter <adrian.hunter@...el.com>
AuthorDate:    Mon, 31 Jan 2022 09:24:53 +02:00
Committer:     Peter Zijlstra <peterz@...radead.org>
CommitterDate: Wed, 02 Feb 2022 13:11:43 +01:00

perf/core: Allow kernel address filter when not filtering the kernel

The so-called 'kernel' address filter can also be useful for filtering
fixed addresses in user space.  Allow that.

Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Link: https://lore.kernel.org/r/20220131072453.2839535-6-adrian.hunter@intel.com
---
 kernel/events/core.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/kernel/events/core.c b/kernel/events/core.c
index 2889b82..afbf388 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -10515,8 +10515,6 @@ perf_event_parse_addr_filter(struct perf_event *event, char *fstr,
 		 */
 		if (state == IF_STATE_END) {
 			ret = -EINVAL;
-			if (kernel && event->attr.exclude_kernel)
-				goto fail;
 
 			/*
 			 * ACTION "filter" must have a non-zero length region