mm/kmemleak: remove unreachable return statement in scan_should_stop()

mm/kmemleak: remove unreachable return statement in scan_should_stop()

Patch series "mm/kmemleak: Improve scan_should_stop() implementation".

This series improves the scan_should_stop() function by addressing code
quality issues and enhancing kernel thread detection robustness.

This patch (of 2):

Remove unreachable "return 0;" statement as all execution paths return
before reaching it.

No functional change.

Link: https://lkml.kernel.org/r/20260130093729.2045858-2-zhongqiu.han@oss.qualcomm.com
Signed-off-by: Zhongqiu Han <zhongqiu.han@oss.qualcomm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>