From 27600805e62f800bacf990354632eae4e487d34c Mon Sep 17 00:00:00 2001 From: Yazen Ghannam Date: Thu, 3 Sep 2026 10:43:25 -0500 Subject: x86/amd_node: Fix PCI device reference counting in amd_smn_init() The local "root" pointer is a temporary variable used during the device search. Therefore, refcount related to the search iterators should be cleaned up after the search is complete. Use the __free() cleanup macro to ensure the refcount is decremented when the temporary pointer goes out of scope. Additionally, increment the refcount when caching a root pointer. This ensures the in-use refcount is separate from the temporary search refcounting. Finally, drop the redundant "root = NULL" before the second search loop. The pci_get_class() iterator always decrements the refcount of its "from" argument, so the first loop can only fall through with "root" already NULL. Fixes: 0a4b61d9c2e4 ("x86/amd_node: Fix AMD root device caching") Closes: https://sashiko.dev/#/patchset/20260806160159.230453-1-jason.andryuk%40amd.com Reported-by: Sashiko Assisted-by: LLM Signed-off-by: Yazen Ghannam Signed-off-by: Borislav Petkov (AMD) Reviewed-by: Mario Limonciello (AMD) Cc: Link: https://patch.msgid.link/20260903154325.74343-1-yazen.ghannam@amd.com --- tools/perf/Documentation/android.txt | 10 ++++++++++ 1 file changed, 10 insertions(+) create mode 100644 tools/perf/Documentation/android.txt (limited to 'tools/perf/Documentation/android.txt') diff --git a/tools/perf/Documentation/android.txt b/tools/perf/Documentation/android.txt new file mode 100644 index 000000000..3f3cc7ac3 --- /dev/null +++ b/tools/perf/Documentation/android.txt @@ -0,0 +1,10 @@ +How to compile perf for Android +=============================== + +There are two ways to build perf and run it on Android: + +- Method 1: Build perf with static linking. See Build.txt, section + "4) Cross compilation" for how to build a static perf binary. + +- Method 2: Download the Android NDK and use the bundled Clang to + build perf. See Build.txt, section "5) Build with clang" for details. -- cgit v1.3.1