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| author |   Frederic Weisbecker <frederic@kernel.org> | 2022-06-08 16:40:26 +0200 |
|---|---|---|
| committer |   Paul E. McKenney <paulmck@kernel.org> | 2022-07-05 13:32:59 -0700 |
| commit | 6f0e6c1598b1a3d19fc30db86b6e26d6f881b43d (patch) | |
| tree | f6ce7f78ab37fc235f67c3bf40f0a94cefadd6dc /arch | |
| parent | context_tracking: Take idle eqs entrypoints over RCU (diff) | |
| download | linux-dev-6f0e6c1598b1a3d19fc30db86b6e26d6f881b43d.tar.xz linux-dev-6f0e6c1598b1a3d19fc30db86b6e26d6f881b43d.zip | |
context_tracking: Take IRQ eqs entrypoints over RCU
The RCU dynticks counter is going to be merged into the context tracking
subsystem. Prepare with moving the IRQ extended quiescent states
entrypoints to context tracking. For now those are dumb redirection to
existing RCU calls.
[ paulmck: Apply Stephen Rothwell feedback from -next. ]
[ paulmck: Apply Nathan Chancellor feedback. ]
Acked-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Neeraj Upadhyay <quic_neeraju@quicinc.com>
Cc: Uladzislau Rezki <uladzislau.rezki@sony.com>
Cc: Joel Fernandes <joel@joelfernandes.org>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Nicolas Saenz Julienne <nsaenz@kernel.org>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Xiongfeng Wang <wangxiongfeng2@huawei.com>
Cc: Yu Liao <liaoyu15@huawei.com>
Cc: Phil Auld <pauld@redhat.com>
Cc: Paul Gortmaker<paul.gortmaker@windriver.com>
Cc: Alex Belits <abelits@marvell.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Reviewed-by: Nicolas Saenz Julienne <nsaenzju@redhat.com>
Tested-by: Nicolas Saenz Julienne <nsaenzju@redhat.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/Kconfig | 2 | ||||
| -rw-r--r-- | arch/arm64/kernel/entry-common.c | 6 | ||||
| -rw-r--r-- | arch/x86/mm/fault.c | 2 |
3 files changed, 5 insertions, 5 deletions
diff --git a/arch/Kconfig b/arch/Kconfig index 154b7b78da09..342642be105f 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -782,7 +782,7 @@ config HAVE_CONTEXT_TRACKING_USER Syscalls need to be wrapped inside user_exit()-user_enter(), either optimized behind static key or through the slow path using TIF_NOHZ flag. Exceptions handlers must be wrapped as well. Irqs are already - protected inside rcu_irq_enter/rcu_irq_exit() but preemption or signal + protected inside ct_irq_enter/ct_irq_exit() but preemption or signal handling on irq exit still need to be protected. config HAVE_CONTEXT_TRACKING_USER_OFFSTACK diff --git a/arch/arm64/kernel/entry-common.c b/arch/arm64/kernel/entry-common.c index 56cefd33eb8e..8dabe9ec10f1 100644 --- a/arch/arm64/kernel/entry-common.c +++ b/arch/arm64/kernel/entry-common.c @@ -41,7 +41,7 @@ static __always_inline void __enter_from_kernel_mode(struct pt_regs *regs) if (!IS_ENABLED(CONFIG_TINY_RCU) && is_idle_task(current)) { lockdep_hardirqs_off(CALLER_ADDR0); - rcu_irq_enter(); + ct_irq_enter(); trace_hardirqs_off_finish(); regs->exit_rcu = true; @@ -76,7 +76,7 @@ static __always_inline void __exit_to_kernel_mode(struct pt_regs *regs) if (regs->exit_rcu) { trace_hardirqs_on_prepare(); lockdep_hardirqs_on_prepare(); - rcu_irq_exit(); + ct_irq_exit(); lockdep_hardirqs_on(CALLER_ADDR0); return; } @@ -84,7 +84,7 @@ static __always_inline void __exit_to_kernel_mode(struct pt_regs *regs) trace_hardirqs_on(); } else { if (regs->exit_rcu) - rcu_irq_exit(); + ct_irq_exit(); } } diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c index fad8faa29d04..971977c438fc 100644 --- a/arch/x86/mm/fault.c +++ b/arch/x86/mm/fault.c @@ -1526,7 +1526,7 @@ DEFINE_IDTENTRY_RAW_ERRORCODE(exc_page_fault) /* * Entry handling for valid #PF from kernel mode is slightly - * different: RCU is already watching and rcu_irq_enter() must not + * different: RCU is already watching and ct_irq_enter() must not * be invoked because a kernel fault on a user space address might * sleep. * |