[PATCH] x86/itmt: Don't make ITMT enablement depend on debugfs

[Mario Limonciello]

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 <klaus.kusche@xxxxxxxxxxxxxxx>
Signed-off-by: Mario Limonciello <mario.limonciello@xxxxxxx>
---
 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;
 
-- 
2.43.0