add can driver

hc

2023-12-02 57e32c52610e6a560beda60bf33c48f9f42306d5

 kernel/arch/x86/kernel/asm-offsets.c
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@@ -38,6 +38,7 @@
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 	BLANK();
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 	OFFSET(TASK_TI_flags, task_struct, thread_info.flags);
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+	OFFSET(TASK_TI_preempt_lazy_count, task_struct, thread_info.preempt_lazy_count);
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 	OFFSET(TASK_addr_limit, task_struct, thread.addr_limit);
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 	BLANK();
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@@ -94,6 +95,7 @@
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 	BLANK();
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 	DEFINE(PTREGS_SIZE, sizeof(struct pt_regs));
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+	DEFINE(_PREEMPT_ENABLED, PREEMPT_ENABLED);
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 	/* TLB state for the entry code */
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 	OFFSET(TLB_STATE_user_pcid_flush_mask, tlb_state, user_pcid_flush_mask);