add at24 driver

hc

2023-11-06 15ade055295d13f95d49e3d99b09f3bbfb4a43e7

 kernel/include/linux/smp.h
..
..
@@ -202,6 +202,9 @@
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 #define get_cpu()		({ preempt_disable(); smp_processor_id(); })
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 #define put_cpu()		preempt_enable()
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+#define get_cpu_light()		({ migrate_disable(); smp_processor_id(); })
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+#define put_cpu_light()		migrate_enable()
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+
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 /*
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  * Callback to arch code if there's nosmp or maxcpus=0 on the
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  * boot command line: