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Message-Id: <20211130114433.2580590-19-elver@google.com>
Date: Tue, 30 Nov 2021 12:44:26 +0100
From: Marco Elver <elver@...gle.com>
To: elver@...gle.com, "Paul E. McKenney" <paulmck@...nel.org>
Cc: Alexander Potapenko <glider@...gle.com>,
Boqun Feng <boqun.feng@...il.com>,
Borislav Petkov <bp@...en8.de>,
Dmitry Vyukov <dvyukov@...gle.com>,
Ingo Molnar <mingo@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Peter Zijlstra <peterz@...radead.org>,
Thomas Gleixner <tglx@...utronix.de>,
Waiman Long <longman@...hat.com>,
Will Deacon <will@...nel.org>, kasan-dev@...glegroups.com,
linux-arch@...r.kernel.org, linux-doc@...r.kernel.org,
linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-mm@...ck.org, llvm@...ts.linux.dev, x86@...nel.org
Subject: [PATCH v3 18/25] x86/barriers, kcsan: Use generic instrumentation for
non-smp barriers
Prefix all barriers with __, now that asm-generic/barriers.h supports
defining the final instrumented version of these barriers. The change is
limited to barriers used by x86-64.
Signed-off-by: Marco Elver <elver@...gle.com>
---
arch/x86/include/asm/barrier.h | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/arch/x86/include/asm/barrier.h b/arch/x86/include/asm/barrier.h
index 3ba772a69cc8..35389b2af88e 100644
--- a/arch/x86/include/asm/barrier.h
+++ b/arch/x86/include/asm/barrier.h
@@ -19,9 +19,9 @@
#define wmb() asm volatile(ALTERNATIVE("lock; addl $0,-4(%%esp)", "sfence", \
X86_FEATURE_XMM2) ::: "memory", "cc")
#else
-#define mb() asm volatile("mfence":::"memory")
-#define rmb() asm volatile("lfence":::"memory")
-#define wmb() asm volatile("sfence" ::: "memory")
+#define __mb() asm volatile("mfence":::"memory")
+#define __rmb() asm volatile("lfence":::"memory")
+#define __wmb() asm volatile("sfence" ::: "memory")
#endif
/**
@@ -51,8 +51,8 @@ static inline unsigned long array_index_mask_nospec(unsigned long index,
/* Prevent speculative execution past this barrier. */
#define barrier_nospec() alternative("", "lfence", X86_FEATURE_LFENCE_RDTSC)
-#define dma_rmb() barrier()
-#define dma_wmb() barrier()
+#define __dma_rmb() barrier()
+#define __dma_wmb() barrier()
#define __smp_mb() asm volatile("lock; addl $0,-4(%%" _ASM_SP ")" ::: "memory", "cc")
--
2.34.0.rc2.393.gf8c9666880-goog
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