linux-kernel - [PATCH 03/29] tsx: Add generic disable

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Message-Id: <1364001923-10796-4-git-send-email-andi@firstfloor.org>
Date:	Fri, 22 Mar 2013 18:24:57 -0700
From:	Andi Kleen <andi@...stfloor.org>
To:	linux-kernel@...r.kernel.org
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	x86@...nel.org, Andi Kleen <ak@...ux.intel.com>
Subject: [PATCH 03/29] tsx: Add generic disable_txn macros

From: Andi Kleen <ak@...ux.intel.com>

Add generic macros to disable transactions per process.
Without TSX (or other HTM) support this is a noop.
An RTM enabled x86 kernel uses its own version.

Signed-off-by: Andi Kleen <ak@...ux.intel.com>
---
 include/linux/thread_info.h |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/include/linux/thread_info.h b/include/linux/thread_info.h
index e7e0473..5a4bec0 100644
--- a/include/linux/thread_info.h
+++ b/include/linux/thread_info.h
@@ -148,6 +148,12 @@ static inline bool test_and_clear_restore_sigmask(void)
 #error "no set_restore_sigmask() provided and default one won't work"
 #endif
 
+#ifndef CONFIG_RTM_LOCKS
+#define disable_txn() do {} while (0)
+#define reenable_txn() do {} while (0)
+#define txn_disabled() 0
+#endif
+
 #endif	/* __KERNEL__ */
 
 #endif /* _LINUX_THREAD_INFO_H */
-- 
1.7.7.6

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