unix: update to Linux kernel 6.4

Change-Id: I88b628a97f5cfb76083968be2ff2e9857ce56557
Reviewed-on: https://go-review.googlesource.com/c/sys/+/577975
Auto-Submit: Tobias Klauser <tobias.klauser@gmail.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Carlos Amedee <carlos@golang.org>

Author: tklauser

unix/linux/Dockerfile

@@ -15,8 +15,8 @@ RUN apt-get update && apt-get install -y  --no-install-recommends \
 # Get the git sources. If not cached, this takes O(5 minutes).
 WORKDIR /git
 RUN git config --global advice.detachedHead false
-# Linux Kernel: Released 07 January 2024
-RUN git clone --branch v6.7 --depth 1 https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux
+# Linux Kernel: Released 10 March 2024
+RUN git clone --branch v6.8 --depth 1 https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux
 # GNU C library: Released 1 Feb 2023
 RUN git clone --branch release/2.37/master --depth 1 https://sourceware.org/git/glibc.git
 

unix/linux/types.go

@@ -1272,6 +1272,7 @@ const (
 	PERF_SAMPLE_BRANCH_TYPE_SAVE_SHIFT    = C.PERF_SAMPLE_BRANCH_TYPE_SAVE_SHIFT
 	PERF_SAMPLE_BRANCH_HW_INDEX_SHIFT     = C.PERF_SAMPLE_BRANCH_HW_INDEX_SHIFT
 	PERF_SAMPLE_BRANCH_PRIV_SAVE_SHIFT    = C.PERF_SAMPLE_BRANCH_PRIV_SAVE_SHIFT
+	PERF_SAMPLE_BRANCH_COUNTERS           = C.PERF_SAMPLE_BRANCH_COUNTERS
 	PERF_SAMPLE_BRANCH_MAX_SHIFT          = C.PERF_SAMPLE_BRANCH_MAX_SHIFT
 	PERF_SAMPLE_BRANCH_USER               = C.PERF_SAMPLE_BRANCH_USER
 	PERF_SAMPLE_BRANCH_KERNEL             = C.PERF_SAMPLE_BRANCH_KERNEL