add at24 driver

hc

2023-11-06 15ade055295d13f95d49e3d99b09f3bbfb4a43e7

 kernel/arch/powerpc/include/asm/thread_info.h
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@@ -37,6 +37,8 @@
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 	int		cpu;			/* cpu we're on */
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 	int		preempt_count;		/* 0 => preemptable,
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 						   <0 => BUG */
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+	int		preempt_lazy_count;	/* 0 => preemptable,
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+						   <0 => BUG */
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 	unsigned long	local_flags;		/* private flags for thread */
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 #ifdef CONFIG_LIVEPATCH
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 	unsigned long *livepatch_sp;
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@@ -81,18 +83,18 @@
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 #define TIF_SIGPENDING		1	/* signal pending */
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 #define TIF_NEED_RESCHED	2	/* rescheduling necessary */
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 #define TIF_FSCHECK		3	/* Check FS is USER_DS on return */
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-#define TIF_32BIT		4	/* 32 bit binary */
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 #define TIF_RESTORE_TM		5	/* need to restore TM FP/VEC/VSX */
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 #define TIF_PATCH_PENDING	6	/* pending live patching update */
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 #define TIF_SYSCALL_AUDIT	7	/* syscall auditing active */
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 #define TIF_SINGLESTEP		8	/* singlestepping active */
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 #define TIF_NOHZ		9	/* in adaptive nohz mode */
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 #define TIF_SECCOMP		10	/* secure computing */
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-#define TIF_RESTOREALL		11	/* Restore all regs (implies NOERROR) */
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-#define TIF_NOERROR		12	/* Force successful syscall return */
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+
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+#define TIF_NEED_RESCHED_LAZY	11	/* lazy rescheduling necessary */
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+#define TIF_SYSCALL_TRACEPOINT	12	/* syscall tracepoint instrumentation */
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+
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 #define TIF_NOTIFY_RESUME	13	/* callback before returning to user */
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 #define TIF_UPROBE		14	/* breakpointed or single-stepping */
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-#define TIF_SYSCALL_TRACEPOINT	15	/* syscall tracepoint instrumentation */
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 #define TIF_EMULATE_STACK_STORE	16	/* Is an instruction emulation
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 						for stack store? */
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 #define TIF_MEMDIE		17	/* is terminating due to OOM killer */
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@@ -100,6 +102,10 @@
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 #define TIF_ELF2ABI		18	/* function descriptors must die! */
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 #endif
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 #define TIF_POLLING_NRFLAG	19	/* true if poll_idle() is polling TIF_NEED_RESCHED */
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+#define TIF_32BIT		20	/* 32 bit binary */
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+#define TIF_RESTOREALL		21	/* Restore all regs (implies NOERROR) */
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+#define TIF_NOERROR		22	/* Force successful syscall return */
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+
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 /* as above, but as bit values */
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 #define _TIF_SYSCALL_TRACE	(1<<TIF_SYSCALL_TRACE)
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@@ -119,6 +125,7 @@
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 #define _TIF_SYSCALL_TRACEPOINT	(1<<TIF_SYSCALL_TRACEPOINT)
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 #define _TIF_EMULATE_STACK_STORE	(1<<TIF_EMULATE_STACK_STORE)
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 #define _TIF_NOHZ		(1<<TIF_NOHZ)
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+#define _TIF_NEED_RESCHED_LAZY	(1<<TIF_NEED_RESCHED_LAZY)
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 #define _TIF_FSCHECK		(1<<TIF_FSCHECK)
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 #define _TIF_SYSCALL_DOTRACE	(_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \
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 				 _TIF_SECCOMP | _TIF_SYSCALL_TRACEPOINT | \
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@@ -127,8 +134,9 @@
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 #define _TIF_USER_WORK_MASK	(_TIF_SIGPENDING | _TIF_NEED_RESCHED | \
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 				 _TIF_NOTIFY_RESUME | _TIF_UPROBE | \
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 				 _TIF_RESTORE_TM | _TIF_PATCH_PENDING | \
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-				 _TIF_FSCHECK)
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+				 _TIF_FSCHECK | _TIF_NEED_RESCHED_LAZY)
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 #define _TIF_PERSYSCALL_MASK	(_TIF_RESTOREALL|_TIF_NOERROR)
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+#define _TIF_NEED_RESCHED_MASK	(_TIF_NEED_RESCHED | _TIF_NEED_RESCHED_LAZY)
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 /* Bits in local_flags */
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 /* Don't move TLF_NAPPING without adjusting the code in entry_32.S */