linux-kernel - [PATCH] arm64: asm: setup.h: export common variables

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Message-Id: <20211007195601.677474-1-anders.roxell@linaro.org>
Date:   Thu,  7 Oct 2021 21:56:01 +0200
From:   Anders Roxell <anders.roxell@...aro.org>
To:     catalin.marinas@....com, will@...nel.org
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Anders Roxell <anders.roxell@...aro.org>
Subject: [PATCH] arm64: asm: setup.h: export common variables

When building the kernel with sparse enabled 'C=1' the following
warnings can be seen:

arch/arm64/kernel/setup.c:58:13: warning: symbol '__fdt_pointer' was not declared. Should it be static?
arch/arm64/kernel/setup.c:84:25: warning: symbol 'boot_args' was not declared. Should it be static?

Rework so the variables are exported, since these two variable are
created and used in setup.c, also used in head.S.

Signed-off-by: Anders Roxell <anders.roxell@...aro.org>
---
 arch/arm64/include/asm/setup.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/arm64/include/asm/setup.h b/arch/arm64/include/asm/setup.h
index d3320618ed14..6437df661700 100644
--- a/arch/arm64/include/asm/setup.h
+++ b/arch/arm64/include/asm/setup.h
@@ -8,4 +8,10 @@
 void *get_early_fdt_ptr(void);
 void early_fdt_map(u64 dt_phys);
 
+/*
+ * These two variables are used in the head.S file.
+ */
+extern phys_addr_t __fdt_pointer __initdata;
+extern u64 __cacheline_aligned boot_args[4];
+
 #endif
-- 
2.33.0