[bug report] drm/amd/display: Simplify the per-CPU usage.

[Dan Carpenter]

On Thu, Feb 01, 2024 at 02:53:42PM +0100, Sebastian Andrzej Siewior wrote:
> On 2024-02-01 15:18:04 [+0300], Dan Carpenter wrote:
> > Hello Sebastian Andrzej Siewior,
> Hi Dan,
> 
> > The patch de5e73dc6baf: "drm/amd/display: Simplify the per-CPU
> > usage." from Sep 21, 2023 (linux-next), leads to the following Smatch
> > static checker warning:
> 
> Did I introduce that or has it been made visible?
> That change adds preempt_disable() to DC_FP_START() but this was there
> already, just hidden. For x86 it is done within kernel_fpu_begin().
> 

Sorry, yeah, the bug was there before.  I don't know why this shows up
as a new warning.  Probably it's because AMD driver files were renamed...
Smatch parses kernel_fpu_begin() correctly and sees the preempt_disable()
but I didn't know it disables preemption so it's likely human error on
my part.

regards,
dan carpenter