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 4/5] arm: Remove TIF_NOHZ
Date: Fri, 14 Feb 2020 16:26:14 +0100 [thread overview]
Message-ID: <20200214152615.25447-5-frederic@kernel.org> (raw)
In-Reply-To: <20200214152615.25447-1-frederic@kernel.org>
Arm entry code calls context tracking from fast path. TIF_NOHZ is unused
and can be safely removed.
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: Russell King <linux@armlinux.org.uk>
---
arch/arm/Kconfig | 1 -
arch/arm/include/asm/thread_info.h | 1 -
2 files changed, 2 deletions(-)
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 38b764cae559..97864aabc2a6 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -72,7 +72,6 @@ config ARM
select HAVE_ARM_SMCCC if CPU_V7
select HAVE_EBPF_JIT if !CPU_ENDIAN_BE32
select HAVE_CONTEXT_TRACKING
- select HAVE_TIF_NOHZ
select HAVE_COPY_THREAD_TLS
select HAVE_C_RECORDMCOUNT
select HAVE_DEBUG_KMEMLEAK if !XIP_KERNEL
diff --git a/arch/arm/include/asm/thread_info.h b/arch/arm/include/asm/thread_info.h
index 0d0d5178e2c3..3609a6980c34 100644
--- a/arch/arm/include/asm/thread_info.h
+++ b/arch/arm/include/asm/thread_info.h
@@ -141,7 +141,6 @@ extern int vfp_restore_user_hwstate(struct user_vfp *,
#define TIF_SYSCALL_TRACEPOINT 6 /* syscall tracepoint instrumentation */
#define TIF_SECCOMP 7 /* seccomp syscall filtering active */
-#define TIF_NOHZ 12 /* in adaptive nohz mode */
#define TIF_USING_IWMMXT 17
#define TIF_MEMDIE 18 /* is terminating due to OOM killer */
#define TIF_RESTORE_SIGMASK 20
--
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 ` [PATCH 3/5] x86: Remove TIF_NOHZ Frederic Weisbecker
2020-02-14 15:26 ` Frederic Weisbecker [this message]
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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