linux-kernel - [tip:x86/io] x86: Simplify flush_write

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <tip-910bf6ad0be3e1efbda0e9d358794937b52c9860@git.kernel.org>
Date:	Fri, 5 Feb 2010 22:50:04 GMT
From:	tip-bot for Brian Gerst <brgerst@...il.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	brgerst@...il.com, tglx@...utronix.de
Subject: [tip:x86/io] x86: Simplify flush_write_buffers()

Commit-ID:  910bf6ad0be3e1efbda0e9d358794937b52c9860
Gitweb:     http://git.kernel.org/tip/910bf6ad0be3e1efbda0e9d358794937b52c9860
Author:     Brian Gerst <brgerst@...il.com>
AuthorDate: Fri, 5 Feb 2010 09:37:08 -0500
Committer:  H. Peter Anvin <hpa@...or.com>
CommitDate: Fri, 5 Feb 2010 13:57:38 -0800

x86: Simplify flush_write_buffers()

Always make it an inline instead of using a macro for the no-op case.

Signed-off-by: Brian Gerst <brgerst@...il.com>
LKML-Reference: <1265380629-3212-7-git-send-email-brgerst@...il.com>
Signed-off-by: H. Peter Anvin <hpa@...or.com>
---
 arch/x86/include/asm/io_32.h |   10 ++--------
 arch/x86/include/asm/io_64.h |    8 +++++++-
 2 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/arch/x86/include/asm/io_32.h b/arch/x86/include/asm/io_32.h
index 685e332..e8177f3 100644
--- a/arch/x86/include/asm/io_32.h
+++ b/arch/x86/include/asm/io_32.h
@@ -84,18 +84,12 @@ memcpy_toio(volatile void __iomem *dst, const void *src, size_t count)
  *	2. Accidentally out of order processors (PPro errata #51)
  */
 
-#if defined(CONFIG_X86_OOSTORE) || defined(CONFIG_X86_PPRO_FENCE)
-
 static inline void flush_write_buffers(void)
 {
+#if defined(CONFIG_X86_OOSTORE) || defined(CONFIG_X86_PPRO_FENCE)
 	asm volatile("lock; addl $0,0(%%esp)": : :"memory");
-}
-
-#else
-
-#define flush_write_buffers() do { } while (0)
-
 #endif
+}
 
 #endif /* __KERNEL__ */
 
diff --git a/arch/x86/include/asm/io_64.h b/arch/x86/include/asm/io_64.h
index 1305525..6964a1c 100644
--- a/arch/x86/include/asm/io_64.h
+++ b/arch/x86/include/asm/io_64.h
@@ -83,7 +83,13 @@ memcpy_toio(volatile void __iomem *dst, const void *src, size_t count)
  *	1. Out of order aware processors
  *	2. Accidentally out of order processors (PPro errata #51)
  */
-#define flush_write_buffers() do { } while (0)
+
+static inline void flush_write_buffers(void)
+{
+#if defined(CONFIG_X86_OOSTORE) || defined(CONFIG_X86_PPRO_FENCE)
+	asm volatile("lock; addl $0,0(%%esp)": : :"memory");
+#endif
+}
 
 #endif /* __KERNEL__ */
 
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/