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Subject[PATCH] microblaze: add support for TIF_NOTIFY_SIGNAL
Date
Wire up TIF_NOTIFY_SIGNAL handling for microblaze.

Cc: Michal Simek <monstr@monstr.eu>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---

5.11 has support queued up for TIF_NOTIFY_SIGNAL, see this posting
for details:

https://lore.kernel.org/io-uring/20201026203230.386348-1-axboe@kernel.dk/

As part of that work, I'm adding TIF_NOTIFY_SIGNAL support to all archs,
as that will enable a set of cleanups once all of them support it. I'm
happy carrying this patch if need be, or it can be funelled through the
arch tree. Let me know.

arch/microblaze/include/asm/thread_info.h | 2 ++
arch/microblaze/kernel/signal.c | 3 ++-
2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/arch/microblaze/include/asm/thread_info.h b/arch/microblaze/include/asm/thread_info.h
index ad8e8fcb90d3..44f5ca331862 100644
--- a/arch/microblaze/include/asm/thread_info.h
+++ b/arch/microblaze/include/asm/thread_info.h
@@ -107,6 +107,7 @@ static inline struct thread_info *current_thread_info(void)
#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
/* restore singlestep on return to user mode */
#define TIF_SINGLESTEP 4
+#define TIF_NOTIFY_SIGNAL 5 /* signal notifications exist */
#define TIF_MEMDIE 6 /* is terminating due to OOM killer */
#define TIF_SYSCALL_AUDIT 9 /* syscall auditing active */
#define TIF_SECCOMP 10 /* secure computing */
@@ -119,6 +120,7 @@ static inline struct thread_info *current_thread_info(void)
#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
+#define _TIF_NOTIFY_SIGNAL (1 << TIF_NOTIFY_SIGNAL)
#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
#define _TIF_SECCOMP (1 << TIF_SECCOMP)
diff --git a/arch/microblaze/kernel/signal.c b/arch/microblaze/kernel/signal.c
index f11a0ccccabc..5a8d173d7b75 100644
--- a/arch/microblaze/kernel/signal.c
+++ b/arch/microblaze/kernel/signal.c
@@ -313,7 +313,8 @@ static void do_signal(struct pt_regs *regs, int in_syscall)

asmlinkage void do_notify_resume(struct pt_regs *regs, int in_syscall)
{
- if (test_thread_flag(TIF_SIGPENDING))
+ if (test_thread_flag(TIF_SIGPENDING) ||
+ test_thread_flag(TIF_NOTIFY_SIGNAL))
do_signal(regs, in_syscall);

if (test_thread_flag(TIF_NOTIFY_RESUME))
--
2.29.0
--
Jens Axboe

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