arm64: add support for TIF_NOTIFY_SIGNAL

stable inclusion
from stable-v5.10.162
commit 79a9991e87fe61ff2a8b5ac8c112b3ce3544cb53
category: bugfix
bugzilla: https://gitee.com/src-openeuler/kernel/issues/I6BTWC
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v5.10.168&id=79a9991e87fe61ff2a8b5ac8c112b3ce3544cb53

--------------------------------

Wire up TIF_NOTIFY_SIGNAL handling for arm64.

Cc: linux-arm-kernel@lists.infradead.org
Acked-by: NWill Deacon <will@kernel.org>
Acked-by: NCatalin Marinas <catalin.marinas@arm.com>
Signed-off-by: NJens Axboe <axboe@kernel.dk>

Conflicts:
	arch/arm64/include/asm/thread_info.h
Signed-off-by: NLi Lingfeng <lilingfeng3@huawei.com>
Reviewed-by: Ntanghui <tanghui20@huawei.com>
Reviewed-by: NWang Weiyang <wangweiyang2@huawei.com>
Signed-off-by: NJialin Zhang <zhangjialin11@huawei.com>

arch/arm64/include/asm/thread_info.h

@@ -69,6 +69,7 @@ void arch_release_task_struct(struct task_struct *tsk);
 #define TIF_FOREIGN_FPSTATE	3	/* CPU's FP state is not current's */
 #define TIF_UPROBE		4	/* uprobe breakpoint or singlestep */
 #define TIF_MTE_ASYNC_FAULT	5	/* MTE Asynchronous Tag Check Fault */
+#define TIF_NOTIFY_SIGNAL	6	/* signal notifications exist */
 #define TIF_SYSCALL_TRACE	8	/* syscall trace active */
 #define TIF_SYSCALL_AUDIT	9	/* syscall auditing */
 #define TIF_SYSCALL_TRACEPOINT	10	/* syscall tracepoint for ftrace */
@@ -101,13 +102,15 @@ void arch_release_task_struct(struct task_struct *tsk);
 #define _TIF_32BIT		(1 << TIF_32BIT)
 #define _TIF_SVE		(1 << TIF_SVE)
 #define _TIF_MTE_ASYNC_FAULT	(1 << TIF_MTE_ASYNC_FAULT)
+#define _TIF_NOTIFY_SIGNAL	(1 << TIF_NOTIFY_SIGNAL)
 #define _TIF_32BIT_AARCH64	(1 << TIF_32BIT_AARCH64)
 #define _TIF_PATCH_PENDING	(1 << TIF_PATCH_PENDING)
 #define _TIF_POLLING_NRFLAG	(1 << TIF_POLLING_NRFLAG)
 
 #define _TIF_WORK_MASK		(_TIF_NEED_RESCHED | _TIF_SIGPENDING | \
 				 _TIF_NOTIFY_RESUME | _TIF_FOREIGN_FPSTATE | \
-				 _TIF_UPROBE | _TIF_MTE_ASYNC_FAULT)
+				 _TIF_UPROBE | _TIF_MTE_ASYNC_FAULT | \
+				 _TIF_NOTIFY_SIGNAL)
 
 #define _TIF_SYSCALL_WORK	(_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \
 				 _TIF_SYSCALL_TRACEPOINT | _TIF_SECCOMP | \

arch/arm64/kernel/signal.c

@@ -711,7 +711,7 @@ asmlinkage void do_notify_resume(struct pt_regs *regs,
 					       (void __user *)NULL, current);
 			}
 
-			if (thread_flags & _TIF_SIGPENDING)
+			if (thread_flags & (_TIF_SIGPENDING | _TIF_NOTIFY_SIGNAL))
 				do_signal(regs);
 
 			if (thread_flags & _TIF_NOTIFY_RESUME) {