linux-kernel - [tip: perf/core] perf: Kill __PERF_SAMPLE_CALLCHAIN

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Message-ID: <166325139712.401.13892634089162382455.tip-bot2@tip-bot2>
Date:   Thu, 15 Sep 2022 14:16:37 -0000
From:   "tip-bot2 for Namhyung Kim" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Namhyung Kim <namhyung@...nel.org>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: perf/core] perf: Kill __PERF_SAMPLE_CALLCHAIN_EARLY

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

Commit-ID:     b4e12b2d70fd9eccdb3cef8015dc1788ca38e3fd
Gitweb:        https://git.kernel.org/tip/b4e12b2d70fd9eccdb3cef8015dc1788ca38e3fd
Author:        Namhyung Kim <namhyung@...nel.org>
AuthorDate:    Thu, 08 Sep 2022 14:41:04 -07:00
Committer:     Peter Zijlstra <peterz@...radead.org>
CommitterDate: Tue, 13 Sep 2022 15:03:23 +02:00

perf: Kill __PERF_SAMPLE_CALLCHAIN_EARLY

There's no in-tree user anymore.  Let's get rid of it.

Signed-off-by: Namhyung Kim <namhyung@...nel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Link: https://lore.kernel.org/r/20220908214104.3851807-3-namhyung@kernel.org
---
 arch/x86/events/amd/ibs.c       | 10 ----------
 arch/x86/events/intel/core.c    |  3 ---
 include/uapi/linux/perf_event.h |  2 --
 3 files changed, 15 deletions(-)

diff --git a/arch/x86/events/amd/ibs.c b/arch/x86/events/amd/ibs.c
index dab0941..ce5720b 100644
--- a/arch/x86/events/amd/ibs.c
+++ b/arch/x86/events/amd/ibs.c
@@ -300,16 +300,6 @@ static int perf_ibs_init(struct perf_event *event)
 	hwc->config_base = perf_ibs->msr;
 	hwc->config = config;
 
-	/*
-	 * rip recorded by IbsOpRip will not be consistent with rsp and rbp
-	 * recorded as part of interrupt regs. Thus we need to use rip from
-	 * interrupt regs while unwinding call stack. Setting _EARLY flag
-	 * makes sure we unwind call-stack before perf sample rip is set to
-	 * IbsOpRip.
-	 */
-	if (event->attr.sample_type & PERF_SAMPLE_CALLCHAIN)
-		event->attr.sample_type |= __PERF_SAMPLE_CALLCHAIN_EARLY;
-
 	return 0;
 }
 
diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c
index 7f4e7e6..b16c91a 100644
--- a/arch/x86/events/intel/core.c
+++ b/arch/x86/events/intel/core.c
@@ -3868,9 +3868,6 @@ static int intel_pmu_hw_config(struct perf_event *event)
 		}
 		if (x86_pmu.pebs_aliases)
 			x86_pmu.pebs_aliases(event);
-
-		if (event->attr.sample_type & PERF_SAMPLE_CALLCHAIN)
-			event->attr.sample_type |= __PERF_SAMPLE_CALLCHAIN_EARLY;
 	}
 
 	if (needs_branch_stack(event)) {
diff --git a/include/uapi/linux/perf_event.h b/include/uapi/linux/perf_event.h
index dca1658..e639c74 100644
--- a/include/uapi/linux/perf_event.h
+++ b/include/uapi/linux/perf_event.h
@@ -164,8 +164,6 @@ enum perf_event_sample_format {
 	PERF_SAMPLE_WEIGHT_STRUCT		= 1U << 24,
 
 	PERF_SAMPLE_MAX = 1U << 25,		/* non-ABI */
-
-	__PERF_SAMPLE_CALLCHAIN_EARLY		= 1ULL << 63, /* non-ABI; internal use */
 };
 
 #define PERF_SAMPLE_WEIGHT_TYPE	(PERF_SAMPLE_WEIGHT | PERF_SAMPLE_WEIGHT_STRUCT)