From: Frederic Weisbecker <frederic@kernel.org>
To: LKML <linux-kernel@vger.kernel.org>
Cc: Frederic Weisbecker <frederic@kernel.org>,
Paul Burton <paulburton@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
"David S . Miller" <davem@davemloft.net>,
Borislav Petkov <bp@alien8.de>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
Thomas Gleixner <tglx@linutronix.de>,
Andy Lutomirski <luto@kernel.org>,
Ralf Baechle <ralf@linux-mips.org>,
Ingo Molnar <mingo@redhat.com>, Will Deacon <will@kernel.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Michael Ellerman <mpe@ellerman.id.au>,
Russell King <linux@armlinux.org.uk>
Subject: [PATCH 3/5] x86: Remove TIF_NOHZ
Date: Fri, 14 Feb 2020 16:26:13 +0100 [thread overview]
Message-ID: <20200214152615.25447-4-frederic@kernel.org> (raw)
In-Reply-To: <20200214152615.25447-1-frederic@kernel.org>
Static keys have replaced TIF_NOHZ to optimize the calls to context
tracking. We can now safely remove that thread flag.
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Andy Lutomirski <luto@kernel.org>
---
arch/x86/Kconfig | 1 -
arch/x86/include/asm/thread_info.h | 2 --
2 files changed, 3 deletions(-)
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 549eed3460c9..beea77046f9b 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -211,7 +211,6 @@ config X86
select HAVE_STACK_VALIDATION if X86_64
select HAVE_RSEQ
select HAVE_SYSCALL_TRACEPOINTS
- select HAVE_TIF_NOHZ if X86_64
select HAVE_UNSTABLE_SCHED_CLOCK
select HAVE_USER_RETURN_NOTIFIER
select HAVE_GENERIC_VDSO
diff --git a/arch/x86/include/asm/thread_info.h b/arch/x86/include/asm/thread_info.h
index 6cb9d1b0d1e6..384cdde10680 100644
--- a/arch/x86/include/asm/thread_info.h
+++ b/arch/x86/include/asm/thread_info.h
@@ -92,7 +92,6 @@ struct thread_info {
#define TIF_NOCPUID 15 /* CPUID is not accessible in userland */
#define TIF_NOTSC 16 /* TSC is not accessible in userland */
#define TIF_IA32 17 /* IA32 compatibility process */
-#define TIF_NOHZ 19 /* in adaptive nohz mode */
#define TIF_MEMDIE 20 /* is terminating due to OOM killer */
#define TIF_POLLING_NRFLAG 21 /* idle is polling for TIF_NEED_RESCHED */
#define TIF_IO_BITMAP 22 /* uses I/O bitmap */
@@ -122,7 +121,6 @@ struct thread_info {
#define _TIF_NOCPUID (1 << TIF_NOCPUID)
#define _TIF_NOTSC (1 << TIF_NOTSC)
#define _TIF_IA32 (1 << TIF_IA32)
-#define _TIF_NOHZ (1 << TIF_NOHZ)
#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
#define _TIF_IO_BITMAP (1 << TIF_IO_BITMAP)
#define _TIF_FORCED_TF (1 << TIF_FORCED_TF)
--
2.25.0
next prev parent reply other threads:[~2020-02-14 15:26 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-14 15:26 [PATCH 0/5] context_tracking: Remove TIF_NOHZ from 3 archs Frederic Weisbecker
2020-02-14 15:26 ` [PATCH 1/5] x86/entry: Remove _TIF_NOHZ from _TIF_WORK_SYSCALL_ENTRY Frederic Weisbecker
2020-02-14 15:26 ` [PATCH 2/5] context-tracking: Introduce CONFIG_HAVE_TIF_NOHZ Frederic Weisbecker
2020-02-14 15:26 ` Frederic Weisbecker [this message]
2020-02-14 15:26 ` [PATCH 4/5] arm: Remove TIF_NOHZ Frederic Weisbecker
2020-02-14 15:26 ` [PATCH 5/5] arm64: " Frederic Weisbecker
2020-02-18 8:57 ` Will Deacon
2020-02-18 14:30 ` Frederic Weisbecker
2020-02-20 15:13 ` [GIT PULL] context_tracking: Remove TIF_NOHZ from 3 archs Frederic Weisbecker
2020-02-27 13:23 ` Frederic Weisbecker
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