riscv: export boot_cpu_hartid

The mailbox controller driver for the Microchip Inter-processor
Communication can be built as a module. It uses cpuid_to_hartid_map and
commit 4783ce32b0 ("riscv: export __cpuid_to_hartid_map") enables that
to work for SMP. However, cpuid_to_hartid_map uses boot_cpu_hartid on
non-SMP kernels and this driver can be useful in such configurations[1].

Export boot_cpu_hartid so the driver can be built as a module on non-SMP
kernels as well.

Link: https://lore.kernel.org/lkml/20250617-confess-reimburse-876101e099cb@spud/ [1]
Cc: stable@vger.kernel.org
Fixes: e4b1d67e71 ("mailbox: add Microchip IPC support")
Signed-off-by: Klara Modin <klarasmodin@gmail.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20250617125847.23829-1-klarasmodin@gmail.com
Signed-off-by: Palmer Dabbelt <palmer@dabbelt.com>

This commit is contained in:

Klara Modin

2025-06-23 16:30:05 -07:00

committed by

Palmer Dabbelt

parent 890ba5be63

commit c5136add3f

1 changed files with 1 additions and 0 deletions

									
										arch/riscv/kernel/setup.c
									
		+1
		
												View File
												
				@@ -50,6 +50,7 @@ atomic_t hart_lottery __section(".sdata")

				#endif

				;

				unsigned long boot_cpu_hartid;

				EXPORT_SYMBOL_GPL(boot_cpu_hartid);

				/*

				 * Place kernel memory regions on the resource tree so that