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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/arch/sparc/include/asm/thread_info_64.h
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@@ -121,8 +121,12 @@
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 }
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 /* how to get the thread information struct from C */
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+#ifndef BUILD_VDSO
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 register struct thread_info *current_thread_info_reg asm("g6");
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 #define current_thread_info()	(current_thread_info_reg)
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+#else
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+extern struct thread_info *current_thread_info(void);
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+#endif
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 /* thread information allocation */
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 #if PAGE_SHIFT == 13
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@@ -176,7 +180,7 @@
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 #define TIF_NOTIFY_RESUME	1	/* callback before returning to user */
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 #define TIF_SIGPENDING		2	/* signal pending */
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 #define TIF_NEED_RESCHED	3	/* rescheduling necessary */
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-/* flag bit 4 is available */
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+#define TIF_NOTIFY_SIGNAL	4	/* signal notifications exist */
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 #define TIF_UNALIGNED		5	/* allowed to do unaligned accesses */
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 #define TIF_UPROBE		6	/* breakpointed or singlestepped */
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 #define TIF_32BIT		7	/* 32-bit binary */
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@@ -196,6 +200,7 @@
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 #define _TIF_NOTIFY_RESUME	(1<<TIF_NOTIFY_RESUME)
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 #define _TIF_SIGPENDING		(1<<TIF_SIGPENDING)
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 #define _TIF_NEED_RESCHED	(1<<TIF_NEED_RESCHED)
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+#define _TIF_NOTIFY_SIGNAL	(1<<TIF_NOTIFY_SIGNAL)
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 #define _TIF_UNALIGNED		(1<<TIF_UNALIGNED)
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 #define _TIF_UPROBE		(1<<TIF_UPROBE)
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 #define _TIF_32BIT		(1<<TIF_32BIT)
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@@ -209,7 +214,8 @@
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 				 _TIF_DO_NOTIFY_RESUME_MASK | \
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 				 _TIF_NEED_RESCHED)
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 #define _TIF_DO_NOTIFY_RESUME_MASK	(_TIF_NOTIFY_RESUME | \
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-					 _TIF_SIGPENDING | _TIF_UPROBE)
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+					 _TIF_SIGPENDING | _TIF_UPROBE | \
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+					 _TIF_NOTIFY_SIGNAL)
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 #define is_32bit_task()	(test_thread_flag(TIF_32BIT))
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