[PATCH 03/29] tsx: Add generic disable_txn macros

[Andi Kleen]

From: Andi Kleen <ak@xxxxxxxxxxxxxxx>

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@xxxxxxxxxxxxxxx>
---
 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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