[PATCH 12/16] arm64: prefer __section from compiler_attributes.h

From: Nick Desaulniers <ndesaulniers@google.com>
To: akpm@linux-foundation.org
Cc: sedat.dilek@gmail.com, jpoimboe@redhat.com, yhs@fb.com,
	miguel.ojeda.sandonis@gmail.com,
	clang-built-linux@googlegroups.com,
	Nick Desaulniers <ndesaulniers@google.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will@kernel.org>,
	Alexei Starovoitov <ast@kernel.org>,
	Daniel Borkmann <daniel@iogearbox.net>,
	Martin KaFai Lau <kafai@fb.com>, Song Liu <songliubraving@fb.com>,
	Andrey Konovalov <andreyknvl@google.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Enrico Weigelt <info@metux.net>,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Masayoshi Mizuma <m.mizuma@jp.fujitsu.com>,
	Shaokun Zhang <zhangshaokun@hisilicon.com>,
	Alexios Zavras <alexios.zavras@intel.com>,
	Allison Randal <allison@lohutok.net>,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
	bpf@vger.kernel.org
Subject: [PATCH 12/16] arm64: prefer __section from compiler_attributes.h
Date: Mon, 12 Aug 2019 14:50:45 -0700	[thread overview]
Message-ID: <20190812215052.71840-12-ndesaulniers@google.com> (raw)
In-Reply-To: <20190812215052.71840-1-ndesaulniers@google.com>

GCC unescapes escaped string section names while Clang does not. Because
__section uses the `#` stringification operator for the section name, it
doesn't need to be escaped.

This antipattern was found with:
$ grep -e __section\(\" -e __section__\(\" -r

Reported-by: Sedat Dilek <sedat.dilek@gmail.com>
Suggested-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
---
 arch/arm64/include/asm/cache.h     | 2 +-
 arch/arm64/kernel/smp_spin_table.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/include/asm/cache.h b/arch/arm64/include/asm/cache.h
index 64eeaa41e7ca..43da6dd29592 100644
--- a/arch/arm64/include/asm/cache.h
+++ b/arch/arm64/include/asm/cache.h
@@ -78,7 +78,7 @@ static inline u32 cache_type_cwg(void)
 	return (read_cpuid_cachetype() >> CTR_CWG_SHIFT) & CTR_CWG_MASK;
 }
 
-#define __read_mostly __attribute__((__section__(".data..read_mostly")))
+#define __read_mostly __section(.data..read_mostly)
 
 static inline int cache_line_size_of_cpu(void)
 {
diff --git a/arch/arm64/kernel/smp_spin_table.c b/arch/arm64/kernel/smp_spin_table.c
index 76c2739ba8a4..c8a3fee00c11 100644
--- a/arch/arm64/kernel/smp_spin_table.c
+++ b/arch/arm64/kernel/smp_spin_table.c
@@ -19,7 +19,7 @@
 #include <asm/smp_plat.h>
 
 extern void secondary_holding_pen(void);
-volatile unsigned long __section(".mmuoff.data.read")
+volatile unsigned long __section(.mmuoff.data.read)
 secondary_holding_pen_release = INVALID_HWID;
 
 static phys_addr_t cpu_release_addr[NR_CPUS];
-- 
2.23.0.rc1.153.gdeed80330f-goog

