Wire up TIF_NOTIFY_SIGNAL handling for ia64.
Cc: linux-ia64@xxxxxxxxxxxxxxx
Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
---
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@xxxxxxxxx/
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/ia64/include/asm/thread_info.h | 4 +++-
arch/ia64/kernel/process.c | 3 ++-
2 files changed, 5 insertions(+), 2 deletions(-)
diff --git a/arch/ia64/include/asm/thread_info.h b/arch/ia64/include/asm/thread_info.h
index 64a1011f6812..759d7d68a5f2 100644
--- a/arch/ia64/include/asm/thread_info.h
+++ b/arch/ia64/include/asm/thread_info.h
@@ -104,6 +104,7 @@ struct thread_info {
#define TIF_SYSCALL_AUDIT 3 /* syscall auditing active */
#define TIF_SINGLESTEP 4 /* restore singlestep on return to user mode */
#define TIF_NOTIFY_RESUME 6 /* resumption notification requested */
+#define TIF_NOTIFY_SIGNAL 7 /* signal notification exist */
#define TIF_MEMDIE 17 /* is terminating due to OOM killer */
#define TIF_MCA_INIT 18 /* this task is processing MCA or INIT */
#define TIF_DB_DISABLED 19 /* debug trap disabled for fsyscall */
@@ -115,6 +116,7 @@ struct thread_info {
#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
#define _TIF_SYSCALL_TRACEAUDIT (_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SINGLESTEP)
#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
+#define _TIF_SIGNAL_NOTIFY (1 << TIF_SIGNAL_NOTIFY)
#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
#define _TIF_MCA_INIT (1 << TIF_MCA_INIT)
@@ -124,7 +126,7 @@ struct thread_info {
/* "work to do on user-return" bits */
#define TIF_ALLWORK_MASK (_TIF_SIGPENDING|_TIF_NOTIFY_RESUME|_TIF_SYSCALL_AUDIT|\
- _TIF_NEED_RESCHED|_TIF_SYSCALL_TRACE)
+ _TIF_NEED_RESCHED|_TIF_SYSCALL_TRACE|_TIF_NOTIFY_SIGNAL)
/* like TIF_ALLWORK_BITS but sans TIF_SYSCALL_TRACE or TIF_SYSCALL_AUDIT */
#define TIF_WORK_MASK (TIF_ALLWORK_MASK&~(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT))
diff --git a/arch/ia64/kernel/process.c b/arch/ia64/kernel/process.c
index 6b61a703bcf5..0e0146daa88d 100644
--- a/arch/ia64/kernel/process.c
+++ b/arch/ia64/kernel/process.c
@@ -171,7 +171,8 @@ do_notify_resume_user(sigset_t *unused, struct sigscratch *scr, long in_syscall)
}
/* deal with pending signal delivery */
- if (test_thread_flag(TIF_SIGPENDING)) {
+ if (test_thread_flag(TIF_SIGPENDING) ||
+ test_thread_flags(TIF_NOTIFY_SIGNAL)) {
local_irq_enable(); /* force interrupt enable */
ia64_do_signal(scr, in_syscall);
}
--
2.29.0
--
Jens Axboe
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