perf: extract from linuxPackages; deduplicate

There's no reason for us to be packaging old versions of perf. You
don't need to match it with a kernel version. Let's build it from the
latest kernel sources, so it'll get kept up to date.

pkgs/by-name/ho/hotspot/package.nix

···
   kddockwidgets,
   kdePackages,
   libelf,
-  linuxPackages,
+  perf,
   qt6,
   rustc-demangle,
   zstd,
···
   qtWrapperArgs = [
     "--suffix PATH : ${
       lib.makeBinPath [
-        linuxPackages.perf
+        perf
         binutils
       ]
     }"

pkgs/os-specific/linux/kernel/perf/default.nix pkgs/by-name/pe/perf/package.nix

···
   lib,
   stdenv,
   fetchurl,
-  kernel,
+  linux_latest,
   elfutils,
   python3,
   newt,
···
   libiberty,
   audit,
   libbfd,
-  libbfd_2_38,
   libopcodes,
-  libopcodes_2_38,
   libpfm,
   libtraceevent,
   openssl,
···
 
 stdenv.mkDerivation {
   pname = "perf-linux";
-  inherit (kernel) version src;
+  inherit (linux_latest) version src;
 
   strictDeps = true;
 
   depsBuildBuild = [ buildPackages.stdenv.cc ];
-
-  patches =
-    lib.optionals (lib.versionAtLeast kernel.version "5.10" && lib.versionOlder kernel.version "6.13")
-      [
-        # fix wrong path to dmesg
-        ./fix-dmesg-path.diff
-      ];
 
   postPatch = ''
     # Linux scripts
     patchShebangs scripts
     patchShebangs tools/perf/check-headers.sh
-  ''
-  + lib.optionalString (lib.versionAtLeast kernel.version "6.3") ''
     # perf-specific scripts
     patchShebangs tools/perf/pmu-events
-  ''
-  + ''
     cd tools/perf
 
     for x in util/build-id.c util/dso.c; do
       substituteInPlace $x --replace /usr/lib/debug /run/current-system/sw/lib/debug
     done
 
-  ''
-  + lib.optionalString (lib.versionAtLeast kernel.version "5.8") ''
     substituteInPlace scripts/python/flamegraph.py \
       --replace "/usr/share/d3-flame-graph/d3-flamegraph-base.html" \
       "${d3-flame-graph-templates}/share/d3-flame-graph/d3-flamegraph-base.html"
 
-  ''
-  + lib.optionalString (lib.versionAtLeast kernel.version "6.0") ''
     patchShebangs pmu-events/jevents.py
   '';
 
···
     numactl
     python3
     babeltrace
+    libbfd
+    libopcodes
+    libpfm
+    python3.pkgs.setuptools
   ]
-  ++ (
-    if (lib.versionAtLeast kernel.version "5.19") then
-      [
-        libbfd
-        libopcodes
-      ]
-    else
-      [
-        libbfd_2_38
-        libopcodes_2_38
-      ]
-  )
   ++ lib.optional (lib.meta.availableOn stdenv.hostPlatform systemtap-unwrapped) systemtap-unwrapped
   ++ lib.optional withGtk gtk2
   ++ lib.optional withZstd zstd
-  ++ lib.optional withLibcap libcap
-  ++ lib.optional (lib.versionAtLeast kernel.version "5.8") libpfm
-  ++ lib.optional (lib.versionAtLeast kernel.version "6.0") python3.pkgs.setuptools
-  # Python 3.12 no longer includes distutils, not needed for 6.0 and newer.
-  ++
-    lib.optional
-      (!(lib.versionAtLeast kernel.version "6.0") && lib.versionAtLeast python3.version "3.12")
-      [
-        python3.pkgs.distutils
-        python3.pkgs.packaging
-      ];
+  ++ lib.optional withLibcap libcap;
 
   env.NIX_CFLAGS_COMPILE = toString [
     "-Wno-error=cpp"
···
     mainProgram = "perf";
     maintainers = with maintainers; [ tobim ];
     platforms = platforms.linux;
-    broken = kernel.kernelOlder "5";
   };
 }

pkgs/os-specific/linux/kernel/perf/fix-dmesg-path.diff

···
---- a/tools/perf/util/evsel.c	2023-10-20 15:50:53.011023294 +0200
-+++ b/tools/perf/util/evsel.c	2023-10-20 15:51:03.205997633 +0200
-@@ -3076,7 +3076,7 @@
- 
- 	return scnprintf(msg, size,
- 	"The sys_perf_event_open() syscall returned with %d (%s) for event (%s).\n"
--	"/bin/dmesg | grep -i perf may provide additional information.\n",
-+	"\"dmesg | grep -i perf\" may provide additional information.\n",
- 			 err, str_error_r(err, sbuf, sizeof(sbuf)), evsel__name(evsel));
- }
- 

pkgs/top-level/all-packages.nix

···
     );
   buildRustCrateHelpers = callPackage ../build-support/rust/build-rust-crate/helpers.nix { };
 
-  cargo-flamegraph = callPackage ../by-name/ca/cargo-flamegraph/package.nix {
-    inherit (linuxPackages) perf;
-  };
-
   defaultCrateOverrides = callPackage ../build-support/rust/default-crate-overrides.nix { };
 
   inherit (callPackages ../development/tools/rust/cargo-pgrx { })
···
   pycritty = with python3Packages; toPythonApplication pycritty;
 
   qtcreator = qt6Packages.callPackage ../development/tools/qtcreator {
-    inherit (linuxPackages) perf;
     llvmPackages = llvmPackages_21;
     stdenv = llvmPackages_21.stdenv;
   };

pkgs/top-level/linux-kernels.nix

···
 
         netatop = callPackage ../os-specific/linux/netatop { };
 
-        perf = callPackage ../os-specific/linux/kernel/perf { };
-
         prl-tools = callPackage ../os-specific/linux/prl-tools { };
 
         isgx = callPackage ../os-specific/linux/isgx { };
···
         xmm7360-pci = throw "Support for the XMM7360 WWAN card was added to the iosm kmod in mainline kernel version 5.18";
         amdgpu-pro = throw "amdgpu-pro was removed due to lack of maintenance"; # Added 2024-06-16
         kvdo = throw "kvdo was removed, because it was added to mainline in kernel version 6.9"; # Added 2024-07-08
+        perf = lib.warnOnInstantiate "linuxPackages.perf is now perf" pkgs.perf; # Added 2025-08-28
         system76-power = lib.warnOnInstantiate "kernelPackages.system76-power is now pkgs.system76-power" pkgs.system76-power; # Added 2024-10-16
         system76-scheduler = lib.warnOnInstantiate "kernelPackages.system76-scheduler is now pkgs.system76-scheduler" pkgs.system76-scheduler; # Added 2024-10-16
         tuxedo-keyboard = self.tuxedo-drivers; # Added 2024-09-28