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| author | Maxime Ripard <mripard@kernel.org> | 2025-08-20 16:08:49 +0200 |
|---|---|---|
| committer | Maxime Ripard <mripard@kernel.org> | 2025-08-20 16:08:49 +0200 |
| commit | 1a2cf179e2973f6801c67397ecc987391b084bcf (patch) | |
| tree | 9212405e147d9750d493f9f785afdb2769a263c7 /arch/x86/kernel/fpu/xstate.c | |
| parent | 3271faf42d135bcf569c3ff6af55c21858eec212 (diff) | |
| parent | c17b750b3ad9f45f2b6f7e6f7f4679844244f0b9 (diff) | |
Merge drm/drm-fixes into drm-misc-fixes
Update drm-misc-fixes to -rc2.
Signed-off-by: Maxime Ripard <mripard@kernel.org>
Diffstat (limited to 'arch/x86/kernel/fpu/xstate.c')
| -rw-r--r-- | arch/x86/kernel/fpu/xstate.c | 19 |
1 files changed, 10 insertions, 9 deletions
diff --git a/arch/x86/kernel/fpu/xstate.c b/arch/x86/kernel/fpu/xstate.c index 12ed75c1b567..28e4fd65c9da 100644 --- a/arch/x86/kernel/fpu/xstate.c +++ b/arch/x86/kernel/fpu/xstate.c @@ -1881,19 +1881,20 @@ long fpu_xstate_prctl(int option, unsigned long arg2) #ifdef CONFIG_PROC_PID_ARCH_STATUS /* * Report the amount of time elapsed in millisecond since last AVX512 - * use in the task. + * use in the task. Report -1 if no AVX-512 usage. */ static void avx512_status(struct seq_file *m, struct task_struct *task) { - unsigned long timestamp = READ_ONCE(x86_task_fpu(task)->avx512_timestamp); - long delta; + unsigned long timestamp; + long delta = -1; - if (!timestamp) { - /* - * Report -1 if no AVX512 usage - */ - delta = -1; - } else { + /* AVX-512 usage is not tracked for kernel threads. Don't report anything. */ + if (task->flags & (PF_KTHREAD | PF_USER_WORKER)) + return; + + timestamp = READ_ONCE(x86_task_fpu(task)->avx512_timestamp); + + if (timestamp) { delta = (long)(jiffies - timestamp); /* * Cap to LONG_MAX if time difference > LONG_MAX |