From: Dave.Martin@arm.com (Dave Martin)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v5 01/14] thread_info: Add update_thread_flag() helpers
Date: Fri, 4 May 2018 17:05:22 +0100 [thread overview]
Message-ID: <1525449935-31424-2-git-send-email-Dave.Martin@arm.com> (raw)
In-Reply-To: <1525449935-31424-1-git-send-email-Dave.Martin@arm.com>
There are a number of bits of code sprinkled around the kernel to
set a thread flag if a certain condition is true, and clear it
otherwise.
To help make those call sites terser and less cumbersome, this
patch adds a new family of thread flag manipulators
update*_thread_flag([...,] flag, cond)
which do the equivalent of:
if (cond)
set*_thread_flag([...,] flag);
else
clear*_thread_flag([...,] flag);
Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Oleg Nesterov <oleg@redhat.com>
---
include/linux/sched.h | 6 ++++++
include/linux/thread_info.h | 11 +++++++++++
2 files changed, 17 insertions(+)
diff --git a/include/linux/sched.h b/include/linux/sched.h
index b3d697f..c2c3051 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1578,6 +1578,12 @@ static inline void clear_tsk_thread_flag(struct task_struct *tsk, int flag)
clear_ti_thread_flag(task_thread_info(tsk), flag);
}
+static inline void update_tsk_thread_flag(struct task_struct *tsk, int flag,
+ bool value)
+{
+ update_ti_thread_flag(task_thread_info(tsk), flag, value);
+}
+
static inline int test_and_set_tsk_thread_flag(struct task_struct *tsk, int flag)
{
return test_and_set_ti_thread_flag(task_thread_info(tsk), flag);
diff --git a/include/linux/thread_info.h b/include/linux/thread_info.h
index cf2862b..8d8821b 100644
--- a/include/linux/thread_info.h
+++ b/include/linux/thread_info.h
@@ -60,6 +60,15 @@ static inline void clear_ti_thread_flag(struct thread_info *ti, int flag)
clear_bit(flag, (unsigned long *)&ti->flags);
}
+static inline void update_ti_thread_flag(struct thread_info *ti, int flag,
+ bool value)
+{
+ if (value)
+ set_ti_thread_flag(ti, flag);
+ else
+ clear_ti_thread_flag(ti, flag);
+}
+
static inline int test_and_set_ti_thread_flag(struct thread_info *ti, int flag)
{
return test_and_set_bit(flag, (unsigned long *)&ti->flags);
@@ -79,6 +88,8 @@ static inline int test_ti_thread_flag(struct thread_info *ti, int flag)
set_ti_thread_flag(current_thread_info(), flag)
#define clear_thread_flag(flag) \
clear_ti_thread_flag(current_thread_info(), flag)
+#define update_thread_flag(flag, value) \
+ update_ti_thread_flag(current_thread_info(), flag, value)
#define test_and_set_thread_flag(flag) \
test_and_set_ti_thread_flag(current_thread_info(), flag)
#define test_and_clear_thread_flag(flag) \
--
2.1.4
next prev parent reply other threads:[~2018-05-04 16:05 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-04 16:05 [PATCH v5 00/14] KVM: arm64: Optimise FPSIMD context switching Dave Martin
2018-05-04 16:05 ` Dave Martin [this message]
2018-05-04 16:05 ` [PATCH v5 02/14] arm64: Use update{,_tsk}_thread_flag() Dave Martin
2018-05-04 16:05 ` [PATCH v5 03/14] KVM: arm/arm64: Introduce kvm_arch_vcpu_run_pid_change Dave Martin
2018-05-08 8:56 ` Marc Zyngier
2018-05-04 16:05 ` [PATCH v5 04/14] KVM: arm64: Convert lazy FPSIMD context switch trap to C Dave Martin
2018-05-08 9:10 ` Marc Zyngier
2018-05-04 16:05 ` [PATCH v5 05/14] arm64: fpsimd: Generalise context saving for non-task contexts Dave Martin
2018-05-08 9:20 ` Marc Zyngier
2018-05-04 16:05 ` [PATCH v5 06/14] KVM: arm64: Optimise FPSIMD handling to reduce guest/host thrashing Dave Martin
2018-05-08 9:58 ` Marc Zyngier
2018-05-08 10:14 ` Dave Martin
2018-05-04 16:05 ` [PATCH v5 07/14] arm64/sve: Move read_zcr_features() out of cpufeature.h Dave Martin
2018-05-04 16:05 ` [PATCH v5 08/14] arm64/sve: Switch sve_pffr() argument from task to thread Dave Martin
2018-05-04 16:05 ` [PATCH v5 09/14] arm64/sve: Move sve_pffr() to fpsimd.h and make inline Dave Martin
2018-05-04 16:05 ` [PATCH v5 10/14] KVM: arm64: Save host SVE context as appropriate Dave Martin
2018-05-08 10:38 ` Marc Zyngier
2018-05-08 11:25 ` Dave Martin
2018-05-08 11:57 ` Marc Zyngier
2018-05-08 12:40 ` Dave Martin
2018-05-04 16:05 ` [PATCH v5 11/14] KVM: arm64: Remove eager host SVE state saving Dave Martin
2018-05-04 16:05 ` [PATCH v5 12/14] KVM: arm64: Remove redundant *exit_code changes in fpsimd_guest_exit() Dave Martin
2018-05-08 10:51 ` Marc Zyngier
2018-05-04 16:05 ` [PATCH v5 13/14] KVM: arm64: Fold redundant exit code checks out of fixup_guest_exit() Dave Martin
2018-05-08 10:59 ` Marc Zyngier
2018-05-08 11:30 ` Dave Martin
2018-05-08 11:59 ` Marc Zyngier
2018-05-08 12:30 ` Dave Martin
2018-05-04 16:05 ` [PATCH v5 14/14] KVM: arm64: Invoke FPSIMD context switch trap from C Dave Martin
2018-05-08 11:03 ` Marc Zyngier
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