machine_kexec flushes the reboot_code_buffer from the icache after stopping the other cpus.
Commit 3b8c9f1cdfc5 ("arm64: IPI each CPU after invalidating the I-cache for kernel mappings") added an IPI call to flush_icache_range, which causes a hang here, so replace the call with __flush_icache_range Signed-off-by: Dave Kleikamp <dave.kleik...@oracle.com> Cc: AKASHI Takahiro <takahiro.aka...@linaro.org> Cc: Catalin Marinas <catalin.mari...@arm.com> Cc: Will Deacon <will.dea...@arm.com> --- arch/arm64/kernel/machine_kexec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/kernel/machine_kexec.c b/arch/arm64/kernel/machine_kexec.c index f62effc..e8c0283 100644 --- a/arch/arm64/kernel/machine_kexec.c +++ b/arch/arm64/kernel/machine_kexec.c @@ -184,7 +184,7 @@ void machine_kexec(struct kimage *kimage) /* Flush the reboot_code_buffer in preparation for its execution. */ __flush_dcache_area(reboot_code_buffer, arm64_relocate_new_kernel_size); - flush_icache_range((uintptr_t)reboot_code_buffer, + __flush_icache_range((uintptr_t)reboot_code_buffer, arm64_relocate_new_kernel_size); /* Flush the kimage list and its buffers. */ -- 1.8.3.1