[patch V4 33/36] s390: Use generic TIF bits

[Thomas Gleixner <tglx@linutronix.de>]

No point in defining generic items and the upcoming RSEQ optimizations are
only available with this _and_ the generic entry infrastructure, which is
already used by s390. So no further action required here.

This leaves a comment about the AUDIT/TRACE/SECCOMP bits which are handled
by SYSCALL_WORK in the generic code, so they seem redundant, but that's a
problem for the s390 wizards to think about.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Christian Borntraeger <borntraeger@linux.ibm.com>
Cc: Sven Schnelle <svens@linux.ibm.com>

---
 arch/s390/Kconfig                   |    1 
 arch/s390/include/asm/thread_info.h |   44 ++++++++++++++----------------------
 2 files changed, 19 insertions(+), 26 deletions(-)

--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -199,6 +199,7 @@ config S390
 	select HAVE_DYNAMIC_FTRACE_WITH_REGS
 	select HAVE_EBPF_JIT if HAVE_MARCH_Z196_FEATURES
 	select HAVE_EFFICIENT_UNALIGNED_ACCESS
+	select HAVE_GENERIC_TIF_BITS
 	select HAVE_GUP_FAST
 	select HAVE_FENTRY
 	select HAVE_FTRACE_GRAPH_FUNC
--- a/arch/s390/include/asm/thread_info.h
+++ b/arch/s390/include/asm/thread_info.h
@@ -56,43 +56,35 @@ void arch_setup_new_exec(void);
 
 /*
  * thread information flags bit numbers
+ *
+ * Tell the generic TIF infrastructure which special bits s390 supports
  */
-#define TIF_NOTIFY_RESUME	0	/* callback before returning to user */
-#define TIF_SIGPENDING		1	/* signal pending */
-#define TIF_NEED_RESCHED	2	/* rescheduling necessary */
-#define TIF_NEED_RESCHED_LAZY	3	/* lazy rescheduling needed */
-#define TIF_UPROBE		4	/* breakpointed or single-stepping */
-#define TIF_PATCH_PENDING	5	/* pending live patching update */
-#define TIF_ASCE_PRIMARY	6	/* primary asce is kernel asce */
-#define TIF_NOTIFY_SIGNAL	7	/* signal notifications exist */
-#define TIF_GUARDED_STORAGE	8	/* load guarded storage control block */
-#define TIF_ISOLATE_BP_GUEST	9	/* Run KVM guests with isolated BP */
-#define TIF_PER_TRAP		10	/* Need to handle PER trap on exit to usermode */
-#define TIF_31BIT		16	/* 32bit process */
-#define TIF_MEMDIE		17	/* is terminating due to OOM killer */
-#define TIF_RESTORE_SIGMASK	18	/* restore signal mask in do_signal() */
-#define TIF_SINGLE_STEP		19	/* This task is single stepped */
-#define TIF_BLOCK_STEP		20	/* This task is block stepped */
-#define TIF_UPROBE_SINGLESTEP	21	/* This task is uprobe single stepped */
+#define HAVE_TIF_NEED_RESCHED_LAZY
+#define HAVE_TIF_RESTORE_SIGMASK
+
+#include <asm-generic/thread_info_tif.h>
+
+/* Architecture specific bits */
+#define TIF_ASCE_PRIMARY	16	/* primary asce is kernel asce */
+#define TIF_GUARDED_STORAGE	17	/* load guarded storage control block */
+#define TIF_ISOLATE_BP_GUEST	18	/* Run KVM guests with isolated BP */
+#define TIF_PER_TRAP		19	/* Need to handle PER trap on exit to usermode */
+#define TIF_31BIT		20	/* 32bit process */
+#define TIF_SINGLE_STEP		21	/* This task is single stepped */
+#define TIF_BLOCK_STEP		22	/* This task is block stepped */
+#define TIF_UPROBE_SINGLESTEP	23	/* This task is uprobe single stepped */
+
+/* These could move over to SYSCALL_WORK bits, no? */
 #define TIF_SYSCALL_TRACE	24	/* syscall trace active */
 #define TIF_SYSCALL_AUDIT	25	/* syscall auditing active */
 #define TIF_SECCOMP		26	/* secure computing */
 #define TIF_SYSCALL_TRACEPOINT	27	/* syscall tracepoint instrumentation */
 
-#define _TIF_NOTIFY_RESUME	BIT(TIF_NOTIFY_RESUME)
-#define _TIF_SIGPENDING		BIT(TIF_SIGPENDING)
-#define _TIF_NEED_RESCHED	BIT(TIF_NEED_RESCHED)
-#define _TIF_NEED_RESCHED_LAZY	BIT(TIF_NEED_RESCHED_LAZY)
-#define _TIF_UPROBE		BIT(TIF_UPROBE)
-#define _TIF_PATCH_PENDING	BIT(TIF_PATCH_PENDING)
 #define _TIF_ASCE_PRIMARY	BIT(TIF_ASCE_PRIMARY)
-#define _TIF_NOTIFY_SIGNAL	BIT(TIF_NOTIFY_SIGNAL)
 #define _TIF_GUARDED_STORAGE	BIT(TIF_GUARDED_STORAGE)
 #define _TIF_ISOLATE_BP_GUEST	BIT(TIF_ISOLATE_BP_GUEST)
 #define _TIF_PER_TRAP		BIT(TIF_PER_TRAP)
 #define _TIF_31BIT		BIT(TIF_31BIT)
-#define _TIF_MEMDIE		BIT(TIF_MEMDIE)
-#define _TIF_RESTORE_SIGMASK	BIT(TIF_RESTORE_SIGMASK)
 #define _TIF_SINGLE_STEP	BIT(TIF_SINGLE_STEP)
 #define _TIF_BLOCK_STEP		BIT(TIF_BLOCK_STEP)
 #define _TIF_UPROBE_SINGLESTEP	BIT(TIF_UPROBE_SINGLESTEP)