* [PATCH AUTOSEL 4.14 1/9] ARM: rockchip: Use memcpy_toio instead of memcpy on smp bring-up
@ 2021-12-21 2:01 Sasha Levin
0 siblings, 0 replies; only message in thread
From: Sasha Levin @ 2021-12-21 2:01 UTC (permalink / raw)
To: linux-kernel, stable
Cc: Ivan T. Ivanov, Heiko Stuebner, Sasha Levin, linux,
linux-arm-kernel, linux-rockchip
From: "Ivan T. Ivanov" <iivanov@suse.de>
[ Upstream commit 423e85e97aaf69e5198bbec6811e3825c8b5019a ]
This fixes a potential kernel panic on memcpy when FORTIFY_SOURCE
is enabled. Because memory is iomem use appropriate function for
accessing it.
Signed-off-by: Ivan T. Ivanov <iivanov@suse.de>
Link: https://lore.kernel.org/r/20211116084616.24811-1-iivanov@suse.de
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/arm/mach-rockchip/platsmp.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm/mach-rockchip/platsmp.c b/arch/arm/mach-rockchip/platsmp.c
index ecec340ca3457..bb69e6e6defe8 100644
--- a/arch/arm/mach-rockchip/platsmp.c
+++ b/arch/arm/mach-rockchip/platsmp.c
@@ -198,7 +198,7 @@ static int __init rockchip_smp_prepare_sram(struct device_node *node)
rockchip_boot_fn = __pa_symbol(secondary_startup);
/* copy the trampoline to sram, that runs during startup of the core */
- memcpy(sram_base_addr, &rockchip_secondary_trampoline, trampoline_sz);
+ memcpy_toio(sram_base_addr, &rockchip_secondary_trampoline, trampoline_sz);
flush_cache_all();
outer_clean_range(0, trampoline_sz);
--
2.34.1
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