arm64: add support for TIF_NOTIFY_SIGNAL

Wire up TIF_NOTIFY_SIGNAL handling for arm64.

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

diff --git a/arch/arm64/include/asm/thread_info.h b/arch/arm64/include/asm/thread_info.h
index 1fbab85..cdcf307 100644 (file)
--- a/arch/arm64/include/asm/thread_info.h
+++ b/arch/arm64/include/asm/thread_info.h
@@ -68,6 +68,7 @@ void arch_release_task_struct(struct task_struct *tsk);
 #define TIF_UPROBE             4       /* uprobe breakpoint or singlestep */
 #define TIF_FSCHECK            5       /* Check FS is USER_DS on return */
 #define TIF_MTE_ASYNC_FAULT    6       /* MTE Asynchronous Tag Check Fault */
+#define TIF_NOTIFY_SIGNAL      7       /* 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 */
@@ -98,10 +99,12 @@ 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_WORK_MASK         (_TIF_NEED_RESCHED | _TIF_SIGPENDING | \
                                 _TIF_NOTIFY_RESUME | _TIF_FOREIGN_FPSTATE | \
-                                _TIF_UPROBE | _TIF_FSCHECK | _TIF_MTE_ASYNC_FAULT)
+                                _TIF_UPROBE | _TIF_FSCHECK | _TIF_MTE_ASYNC_FAULT | \
+                                _TIF_NOTIFY_SIGNAL)
 
 #define _TIF_SYSCALL_WORK      (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \
                                 _TIF_SYSCALL_TRACEPOINT | _TIF_SECCOMP | \

diff --git a/arch/arm64/kernel/signal.c b/arch/arm64/kernel/signal.c
index a8184ca..bec6ef6 100644 (file)
--- a/arch/arm64/kernel/signal.c
+++ b/arch/arm64/kernel/signal.c
@@ -942,7 +942,7 @@ 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) {