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Peter Anvin" , Peter Zijlstra Cc: Kan Liang , Linux Kernel Mailing List , Linux Next Mailing List References: <20251112154200.4d3671f9@canb.auug.org.au> Content-Language: en-US From: "Mi, Dapeng" In-Reply-To: <20251112154200.4d3671f9@canb.auug.org.au> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit On 11/12/2025 12:42 PM, Stephen Rothwell wrote: > Hi all, > > After merging the tip tree, today's linux-next build (i386 defconfig) > failed like this: > > 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 Thanks for reporting the issue. I suppose the below patch would fix the building error. I would post it as an independent patch later. 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; > > Caused by commit > > d21954c8a0ff ("perf/x86/intel: Process arch-PEBS records or record fragments") > > I have reverted commits > > 2093d8cf80fa ("perf/x86/intel: Optimize PEBS extended config") > 02da693f6658 ("perf/x86/intel: Check PEBS dyn_constraints") > bd24f9beed59 ("perf/x86/intel: Add a check for dynamic constraints") > bb5f13df3c45 ("perf/x86/intel: Add counter group support for arch-PEBS") > 52448a0a7390 ("perf/x86/intel: Setup PEBS data configuration and enable legacy groups") > e89c5d1f290e ("perf/x86/intel: Update dyn_constraint base on PEBS event precise level") > 2721e8da2de7 ("perf/x86/intel: Allocate arch-PEBS buffer and initialize PEBS_BASE MSR") > d21954c8a0ff ("perf/x86/intel: Process arch-PEBS records or record fragments") > > for today. >