7.2-stable review patch. If anyone has any objections, please let me know. ------------------ From: Mario Limonciello [ Upstream commit eaece4849991d62fcd6f46637c55dcce00e25d70 ] sched_set_itmt_support() treats debugfs file creation failures as fatal. When CONFIG_DEBUG_FS is disabled, debugfs stubs return ERR_PTR(-ENODEV), causing ITMT to be silently disabled. debugfs is a debug-only facility; its return values should be ignored. Drop the fatal error handling and enable ITMT unconditionally. Fixes: d04013a4b21b ("x86/itmt: Move the "sched_itmt_enabled" sysctl to debugfs") Reported-by: Klaus Kusche Signed-off-by: Mario Limonciello Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Tim Chen Reviewed-by: K Prateek Nayak Tested-by: K Prateek Nayak Link: https://patch.msgid.link/20260831053836.1881864-1-mario.limonciello@amd.com Signed-off-by: Sasha Levin --- arch/x86/kernel/itmt.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) diff --git a/arch/x86/kernel/itmt.c b/arch/x86/kernel/itmt.c index 243a769fdd97b..85ebde361d6ae 100644 --- a/arch/x86/kernel/itmt.c +++ b/arch/x86/kernel/itmt.c @@ -110,18 +110,14 @@ int sched_set_itmt_support(void) arch_debugfs_dir, &sysctl_sched_itmt_enabled, &dfs_sched_itmt_fops); - if (IS_ERR_OR_NULL(dfs_sched_itmt)) { + if (IS_ERR(dfs_sched_itmt)) dfs_sched_itmt = NULL; - return -ENOMEM; - } dfs_sched_core_prio = debugfs_create_file("sched_core_priority", 0644, arch_debugfs_dir, NULL, &sched_core_priority_fops); - if (IS_ERR_OR_NULL(dfs_sched_core_prio)) { + if (IS_ERR(dfs_sched_core_prio)) dfs_sched_core_prio = NULL; - return -ENOMEM; - } sched_itmt_capable = true; -- 2.53.0