linux-kernel - [PATCH AUTOSEL 5.4 10/10] riscv: export flush_icache

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Date:   Fri,  3 Jan 2020 22:36:19 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Olof Johansson <olof@...om.net>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Sasha Levin <sashal@...nel.org>,
        linux-riscv@...ts.infradead.org
Subject: [PATCH AUTOSEL 5.4 10/10] riscv: export flush_icache_all to modules

From: Olof Johansson <olof@...om.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@...om.net>
Signed-off-by: Paul Walmsley <paul.walmsley@...ive.com>
Signed-off-by: Sasha Levin <sashal@...nel.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