Messages in this thread Patch in this message | | | Date | Thu, 6 Jun 2024 11:06:08 +0200 | From | Ingo Molnar <> | Subject | [PATCH] x86/fpu: Introduce the x86_task_fpu() helper method |
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* Brian Gerst <brgerst@gmail.com> wrote:
> > 17 files changed, 104 insertions(+), 107 deletions(-) > > This series would be better if you added the x86_task_fpu() helper in > an initial patch without any other changes. That would make the > actual changes more visible with less code churn.
Makes sense - I've split out the patch below and adjusted the rest of the series. Is this what you had in mind?
Note that I also robustified the macro a bit:
-# define x86_task_fpu(task) ((struct fpu *)((void *)task + sizeof(*task))) +# define x86_task_fpu(task) ((struct fpu *)((void *)(task) + sizeof(*(task))))
Thanks,
Ingo
========================> From: Ingo Molnar <mingo@kernel.org> Date: Thu, 6 Jun 2024 11:01:14 +0200 Subject: [PATCH] x86/fpu: Introduce the x86_task_fpu() helper method
The per-task FPU context/save area is allocated right next to task_struct() - introduce the x86_task_fpu() helper that calculates this explicitly from the task pointer.
Signed-off-by: Ingo Molnar <mingo@kernel.org> --- arch/x86/include/asm/processor.h | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h index 920b0beebd11..fb6f030f0692 100644 --- a/arch/x86/include/asm/processor.h +++ b/arch/x86/include/asm/processor.h @@ -507,6 +507,8 @@ struct thread_struct { struct fpu *fpu; }; +#define x86_task_fpu(task) ((struct fpu *)((void *)(task) + sizeof(*(task)))) + /* * X86 doesn't need any embedded-FPU-struct quirks: */
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