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

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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: d04013a4b2 ("x86/itmt: Move the "sched_itmt_enabled" sysctl to debugfs")
Reported-by: Klaus Kusche <klaus.kusche@computerix.info>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Tim Chen <tim.c.chen@linux.intel.com>
Reviewed-by: K Prateek Nayak <kprateek.nayak@amd.com>
Tested-by: K Prateek Nayak <kprateek.nayak@amd.com>
Link: https://patch.msgid.link/20260831053836.1881864-1-mario.limonciello@amd.com

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Mario Limonciello 2026-08-31 00:38:33 -05:00 • committed by Peter Zijlstra

parent b038383526

commit eaece48499

1 changed files with 2 additions and 6 deletions

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arch/x86/kernel/itmt.c

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