[PATCH 5.4 186/203] riscv: export flush_icache_all to modules

Greg Kroah-Hartman
2020-01-16T23:41:34Z

From: Olof Johansson <olof@lixom.net>

[ Upstream commit 1833e327a5ea1d1f356fbf6ded0760c9ff4b0594 ]

This is needed by LKDTM (crash dump test module), it calls
flush_icache_range(), which on RISC-V turns into flush_icache_all(). On
other architectures, the actual implementation is exported, so follow
that precedence and export it here too.

Fixes build of CONFIG_LKDTM that fails with:
ERROR: "flush_icache_all" [drivers/misc/lkdtm/lkdtm.ko] undefined!

Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Paul Walmsley <paul.walmsley@sifive.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/riscv/mm/cacheflush.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/arch/riscv/mm/cacheflush.c b/arch/riscv/mm/cacheflush.c
index 3f15938dec89..c54bd3c79955 100644
--- a/arch/riscv/mm/cacheflush.c
+++ b/arch/riscv/mm/cacheflush.c
@@ -14,6 +14,7 @@ void flush_icache_all(void)
{
sbi_remote_fence_i(NULL);
}
+EXPORT_SYMBOL(flush_icache_all);

/*
* Performs an icache flush for the given MM context. RISC-V has no direct
--
2.20.1