kernel_5.10 no rt

hc

2023-12-11 6778948f9de86c3cfaf36725a7c87dcff9ba247f

 kernel/arch/riscv/kernel/mcount.S
..
..
@@ -75,7 +75,6 @@
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 	RESTORE_RET_ABI_STATE
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 	jalr	a1
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 ENDPROC(return_to_handler)
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-EXPORT_SYMBOL(return_to_handler)
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 #endif
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 #ifndef CONFIG_DYNAMIC_FTRACE