From 9a28dbf8af11d127bf1c644143e7882cb91515dd Mon Sep 17 00:00:00 2001
From: "David S. Miller" <davem@davemloft.net>
Date: Mon, 12 May 2008 22:45:15 -0700
Subject: sparc64: Use a TS_RESTORE_SIGMASK

This mirrors x86 changeset 5a8da0ea82db6fa9737041381079fd16f25dcce2
("signals: x86 TS_RESTORE_SIGMASK") on sparc64.

Signed-off-by: David S. Miller <davem@davemloft.net>
---
 include/asm-sparc64/thread_info.h | 28 ++++++++++++++++++++++++----
 1 file changed, 24 insertions(+), 4 deletions(-)

(limited to 'include/asm-sparc64/thread_info.h')

diff --git a/include/asm-sparc64/thread_info.h b/include/asm-sparc64/thread_info.h
index 71e42d1a80d9..e5873e385306 100644
--- a/include/asm-sparc64/thread_info.h
+++ b/include/asm-sparc64/thread_info.h
@@ -38,7 +38,7 @@ struct thread_info {
 	struct task_struct	*task;
 	unsigned long		flags;
 	__u8			fpsaved[7];
-	__u8			pad;
+	__u8			status;
 	unsigned long		ksp;
 
 	/* D$ line 2 */
@@ -217,7 +217,7 @@ register struct thread_info *current_thread_info_reg asm("g6");
  *	 nop
  */
 #define TIF_SYSCALL_TRACE	0	/* syscall trace active */
-#define TIF_RESTORE_SIGMASK	1	/* restore signal mask in do_signal() */
+/* flags bit 1 is available */
 #define TIF_SIGPENDING		2	/* signal pending */
 #define TIF_NEED_RESCHED	3	/* rescheduling necessary */
 #define TIF_PERFCTR		4	/* performance counters active */
@@ -244,14 +244,34 @@ register struct thread_info *current_thread_info_reg asm("g6");
 #define _TIF_32BIT		(1<<TIF_32BIT)
 #define _TIF_SECCOMP		(1<<TIF_SECCOMP)
 #define _TIF_SYSCALL_AUDIT	(1<<TIF_SYSCALL_AUDIT)
-#define _TIF_RESTORE_SIGMASK	(1<<TIF_RESTORE_SIGMASK)
 #define _TIF_ABI_PENDING	(1<<TIF_ABI_PENDING)
 #define _TIF_POLLING_NRFLAG	(1<<TIF_POLLING_NRFLAG)
 
 #define _TIF_USER_WORK_MASK	((0xff << TI_FLAG_WSAVED_SHIFT) | \
-				 (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK | \
+				 (_TIF_SIGPENDING | \
 				  _TIF_NEED_RESCHED | _TIF_PERFCTR))
 
+/*
+ * Thread-synchronous status.
+ *
+ * This is different from the flags in that nobody else
+ * ever touches our thread-synchronous status, so we don't
+ * have to worry about atomic accesses.
+ *
+ * Note that there are only 8 bits available.
+ */
+#define TS_RESTORE_SIGMASK	0x0001	/* restore signal mask in do_signal() */
+
+#ifndef __ASSEMBLY__
+#define HAVE_SET_RESTORE_SIGMASK	1
+static inline void set_restore_sigmask(void)
+{
+	struct thread_info *ti = current_thread_info();
+	ti->status |= TS_RESTORE_SIGMASK;
+	set_bit(TIF_SIGPENDING, &ti->flags);
+}
+#endif	/* !__ASSEMBLY__ */
+
 #endif /* __KERNEL__ */
 
 #endif /* _ASM_THREAD_INFO_H */
-- 
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