linux-kernel - [PATCH v2] arm64: fix missing 'const' qualifiers

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Message-Id: <20171129140303.14283-1-ynorov@caviumnetworks.com>
Date:   Wed, 29 Nov 2017 17:03:03 +0300
From:   Yury Norov <ynorov@...iumnetworks.com>
To:     Will Deacon <will.deacon@....com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     Yury Norov <ynorov@...iumnetworks.com>,
        Alex Matveev <alxmtvv@...il.com>,
        Alexander Potapenko <glider@...gle.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Kees Cook <keescook@...omium.org>,
        Mark Rutland <mark.rutland@....com>,
        Maxim Kuvyrkov <maxim.kuvyrkov@...aro.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Sami Tolvanen <samitolvanen@...gle.com>,
        Stephen Boyd <sboyd@...eaurora.org>
Subject: [PATCH v2] arm64: fix missing 'const' qualifiers

There's inconsistency in variable declaration and section type. GCC doesn't
throw error for usual build. But if LTO enabled, build becomes broken, like
this:

mm/percpu.c:2168:20: error: pcpu_fc_names causes a section type conflict
with dt_supported_cpu_ops
const char * const pcpu_fc_names[PCPU_FC_NR] __initconst = {
        ^
arch/arm64/kernel/cpu_ops.c:34:37: note: ‘dt_supported_cpu_ops’ was declared here
static const struct cpu_operations *dt_supported_cpu_ops[] __initconst = {

And so on. Fix it by adding missed const qualifiers.

v2: more details in patch description.

Signed-off-by: Yury Norov <ynorov@...iumnetworks.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@...gle.com>
---
 arch/arm64/kernel/cpu_ops.c             | 6 +++---
 drivers/clk/hisilicon/crg-hi3516cv300.c | 2 +-
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/arm64/kernel/cpu_ops.c b/arch/arm64/kernel/cpu_ops.c
index d16978213c5b..ea001241bdd4 100644
--- a/arch/arm64/kernel/cpu_ops.c
+++ b/arch/arm64/kernel/cpu_ops.c
@@ -31,13 +31,13 @@ extern const struct cpu_operations cpu_psci_ops;
 
 const struct cpu_operations *cpu_ops[NR_CPUS] __ro_after_init;
 
-static const struct cpu_operations *dt_supported_cpu_ops[] __initconst = {
+static const struct cpu_operations *const dt_supported_cpu_ops[] __initconst = {
 	&smp_spin_table_ops,
 	&cpu_psci_ops,
 	NULL,
 };
 
-static const struct cpu_operations *acpi_supported_cpu_ops[] __initconst = {
+static const struct cpu_operations *const acpi_supported_cpu_ops[] __initconst = {
 #ifdef CONFIG_ARM64_ACPI_PARKING_PROTOCOL
 	&acpi_parking_protocol_ops,
 #endif
@@ -47,7 +47,7 @@ static const struct cpu_operations *acpi_supported_cpu_ops[] __initconst = {
 
 static const struct cpu_operations * __init cpu_get_ops(const char *name)
 {
-	const struct cpu_operations **ops;
+	const struct cpu_operations *const *ops;
 
 	ops = acpi_disabled ? dt_supported_cpu_ops : acpi_supported_cpu_ops;
 
diff --git a/drivers/clk/hisilicon/crg-hi3516cv300.c b/drivers/clk/hisilicon/crg-hi3516cv300.c
index 2007123832bb..53450b651e4c 100644
--- a/drivers/clk/hisilicon/crg-hi3516cv300.c
+++ b/drivers/clk/hisilicon/crg-hi3516cv300.c
@@ -204,7 +204,7 @@ static const struct hisi_crg_funcs hi3516cv300_crg_funcs = {
 /* hi3516CV300 sysctrl CRG */
 #define HI3516CV300_SYSCTRL_NR_CLKS 16
 
-static const char *wdt_mux_p[] __initconst = { "3m", "apb" };
+static const char *const wdt_mux_p[] __initconst = { "3m", "apb" };
 static u32 wdt_mux_table[] = {0, 1};
 
 static const struct hisi_mux_clock hi3516cv300_sysctrl_mux_clks[] = {
-- 
2.11.0