linux-kernel - [tip: x86/entry] x86: Wire up TIF_NOTIFY

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Date:   Thu, 29 Oct 2020 10:35:48 -0000
From:   "tip-bot2 for Jens Axboe" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Jens Axboe <axboe@...nel.dk>, Thomas Gleixner <tglx@...utronix.de>,
        x86 <x86@...nel.org>, LKML <linux-kernel@...r.kernel.org>
Subject: [tip: x86/entry] x86: Wire up TIF_NOTIFY_SIGNAL

The following commit has been merged into the x86/entry branch of tip:

Commit-ID:     c8d5ed67936fddbe2ae845fc80397718006322d7
Gitweb:        https://git.kernel.org/tip/c8d5ed67936fddbe2ae845fc80397718006322d7
Author:        Jens Axboe <axboe@...nel.dk>
AuthorDate:    Mon, 26 Oct 2020 14:32:29 -06:00
Committer:     Thomas Gleixner <tglx@...utronix.de>
CommitterDate: Thu, 29 Oct 2020 11:29:51 +01:00

x86: Wire up TIF_NOTIFY_SIGNAL

The generic entry code has support for TIF_NOTIFY_SIGNAL already. Just
provide the TIF bit.

[ tglx: Adopted to other TIF changes in x86 ]

Signed-off-by: Jens Axboe <axboe@...nel.dk>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Link: https://lore.kernel.org/r/20201026203230.386348-4-axboe@kernel.dk

---
 arch/x86/include/asm/thread_info.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/x86/include/asm/thread_info.h b/arch/x86/include/asm/thread_info.h
index a12b964..06a1710 100644
--- a/arch/x86/include/asm/thread_info.h
+++ b/arch/x86/include/asm/thread_info.h
@@ -91,6 +91,7 @@ struct thread_info {
 #define TIF_NEED_FPU_LOAD	14	/* load FPU on return to userspace */
 #define TIF_NOCPUID		15	/* CPUID is not accessible in userland */
 #define TIF_NOTSC		16	/* TSC is not accessible in userland */
+#define TIF_NOTIFY_SIGNAL	17	/* signal notifications exist */
 #define TIF_SLD			18	/* Restore split lock detection on context switch */
 #define TIF_MEMDIE		20	/* is terminating due to OOM killer */
 #define TIF_POLLING_NRFLAG	21	/* idle is polling for TIF_NEED_RESCHED */
@@ -118,6 +119,7 @@ struct thread_info {
 #define _TIF_NEED_FPU_LOAD	(1 << TIF_NEED_FPU_LOAD)
 #define _TIF_NOCPUID		(1 << TIF_NOCPUID)
 #define _TIF_NOTSC		(1 << TIF_NOTSC)
+#define _TIF_NOTIFY_SIGNAL	(1 << TIF_NOTIFY_SIGNAL)
 #define _TIF_SLD		(1 << TIF_SLD)
 #define _TIF_POLLING_NRFLAG	(1 << TIF_POLLING_NRFLAG)
 #define _TIF_IO_BITMAP		(1 << TIF_IO_BITMAP)