linux-kernel - [PATCH] perf/x86/intel: Fix the building warning for i386 arch

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Message-Id: <20251112063543.3914136-1-dapeng1.mi@linux.intel.com>
Date: Wed, 12 Nov 2025 14:35:43 +0800
From: Dapeng Mi <dapeng1.mi@...ux.intel.com>
To: Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Namhyung Kim <namhyung@...nel.org>,
	Ian Rogers <irogers@...gle.com>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	Andi Kleen <ak@...ux.intel.com>,
	Eranian Stephane <eranian@...gle.com>
Cc: linux-kernel@...r.kernel.org,
	linux-perf-users@...r.kernel.org,
	Dapeng Mi <dapeng1.mi@...el.com>,
	Zide Chen <zide.chen@...el.com>,
	Falcon Thomas <thomas.falcon@...el.com>,
	Xudong Hao <xudong.hao@...el.com>,
	Dapeng Mi <dapeng1.mi@...ux.intel.com>,
	Stephen Rothwell <sfr@...b.auug.org.au>
Subject: [PATCH] perf/x86/intel: Fix the building warning for i386 arch

The warnings below are seen for building i386 arch image.

arch/x86/events/intel/ds.c: In function 'intel_pmu_drain_arch_pebs':
arch/x86/events/intel/ds.c:2983:24: error: cast from pointer to integer of different size [-Werror=pointer-to-int-cast]
 2983 |         top = (void *)((u64)cpuc->pebs_vaddr +
      |                        ^
arch/x86/events/intel/ds.c:2983:15: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast]
 2983 |         top = (void *)((u64)cpuc->pebs_vaddr +
      |               ^
cc1: all warnings being treated as errors

change "u64" to "unsigned long" to fix the building error.

Reported-by: Stephen Rothwell <sfr@...b.auug.org.au>
Closes: https://lore.kernel.org/all/20251112154200.4d3671f9@canb.auug.org.au/
Fixes: d21954c8a0ff ("perf/x86/intel: Process arch-PEBS records or record fragments")
Signed-off-by: Dapeng Mi <dapeng1.mi@...ux.intel.com>
---
 arch/x86/events/intel/ds.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/events/intel/ds.c b/arch/x86/events/intel/ds.c
index c93bf971d97b..f695de9f7049 100644
--- a/arch/x86/events/intel/ds.c
+++ b/arch/x86/events/intel/ds.c
@@ -2979,7 +2979,7 @@ static void intel_pmu_drain_arch_pebs(struct pt_regs *iregs,
 	}
 
 	base = cpuc->pebs_vaddr;
-	top = (void *)((u64)cpuc->pebs_vaddr +
+	top = (void *)((unsigned long)cpuc->pebs_vaddr +
 		       (index.wr << ARCH_PEBS_INDEX_WR_SHIFT));
 
 	index.wr = 0;

base-commit: 2093d8cf80fa5552d1025a78a8f3a10bf3b6466e
prerequisite-patch-id: a15bcd62a8dcd219d17489eef88b66ea5488a2a0
-- 
2.34.1