Document the function a bit more and add debugging check that we are only running this with the current task.
Reviewed-by: Borislav Petkov <[email protected]> Cc: Andy Lutomirski <[email protected]> Cc: Dave Hansen <[email protected]> Cc: Fenghua Yu <[email protected]> Cc: H. Peter Anvin <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Oleg Nesterov <[email protected]> Cc: Thomas Gleixner <[email protected]> Signed-off-by: Ingo Molnar <[email protected]> --- arch/x86/kernel/i387.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/x86/kernel/i387.c b/arch/x86/kernel/i387.c index ac47278cde71..66f1053ae2cd 100644 --- a/arch/x86/kernel/i387.c +++ b/arch/x86/kernel/i387.c @@ -119,9 +119,13 @@ EXPORT_SYMBOL(__kernel_fpu_end); /* * Save the FPU state (initialize it if necessary): + * + * This only ever gets called for the current task. */ void fpu__save(struct task_struct *tsk) { + WARN_ON(tsk != current); + preempt_disable(); if (__thread_has_fpu(tsk)) { if (use_eager_fpu()) { -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
