From: tip-bot for Mukesh Ojha <tipbot@zytor.com>
To: linux-tip-commits@vger.kernel.org
Cc: mingo@kernel.org, linux-kernel@vger.kernel.org,
peterz@infradead.org, tglx@linutronix.de, hpa@zytor.com,
mojha@codeaurora.org
Subject: [tip:smp/urgent] cpu/hotplug: Remove skip_onerr field from cpuhp_step structure
Date: Fri, 31 Aug 2018 05:15:55 -0700 [thread overview]
Message-ID: <tip-6fb86d97207880c1286cd4cb3a7e6a598afbc727@git.kernel.org> (raw)
In-Reply-To: <1535439294-31426-1-git-send-email-mojha@codeaurora.org>
Commit-ID: 6fb86d97207880c1286cd4cb3a7e6a598afbc727
Gitweb: https://git.kernel.org/tip/6fb86d97207880c1286cd4cb3a7e6a598afbc727
Author: Mukesh Ojha <mojha@codeaurora.org>
AuthorDate: Tue, 28 Aug 2018 12:24:54 +0530
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitDate: Fri, 31 Aug 2018 14:13:03 +0200
cpu/hotplug: Remove skip_onerr field from cpuhp_step structure
When notifiers were there, `skip_onerr` was used to avoid calling
particular step startup/teardown callbacks in the CPU up/down rollback
path, which made the hotplug asymmetric.
As notifiers are gone now after the full state machine conversion, the
`skip_onerr` field is no longer required.
Remove it from the structure and its usage.
Signed-off-by: Mukesh Ojha <mojha@codeaurora.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/1535439294-31426-1-git-send-email-mojha@codeaurora.org
---
kernel/cpu.c | 26 ++++----------------------
1 file changed, 4 insertions(+), 22 deletions(-)
diff --git a/kernel/cpu.c b/kernel/cpu.c
index ed44d7d34c2d..aa7fe85ad62e 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -102,8 +102,6 @@ static inline void cpuhp_lock_release(bool bringup) { }
* @name: Name of the step
* @startup: Startup function of the step
* @teardown: Teardown function of the step
- * @skip_onerr: Do not invoke the functions on error rollback
- * Will go away once the notifiers are gone
* @cant_stop: Bringup/teardown can't be stopped at this step
*/
struct cpuhp_step {
@@ -119,7 +117,6 @@ struct cpuhp_step {
struct hlist_node *node);
} teardown;
struct hlist_head list;
- bool skip_onerr;
bool cant_stop;
bool multi_instance;
};
@@ -550,12 +547,8 @@ static int bringup_cpu(unsigned int cpu)
static void undo_cpu_up(unsigned int cpu, struct cpuhp_cpu_state *st)
{
- for (st->state--; st->state > st->target; st->state--) {
- struct cpuhp_step *step = cpuhp_get_step(st->state);
-
- if (!step->skip_onerr)
- cpuhp_invoke_callback(cpu, st->state, false, NULL, NULL);
- }
+ for (st->state--; st->state > st->target; st->state--)
+ cpuhp_invoke_callback(cpu, st->state, false, NULL, NULL);
}
static int cpuhp_up_callbacks(unsigned int cpu, struct cpuhp_cpu_state *st,
@@ -644,12 +637,6 @@ static void cpuhp_thread_fun(unsigned int cpu)
WARN_ON_ONCE(!cpuhp_is_ap_state(state));
- if (st->rollback) {
- struct cpuhp_step *step = cpuhp_get_step(state);
- if (step->skip_onerr)
- goto next;
- }
-
if (cpuhp_is_atomic_state(state)) {
local_irq_disable();
st->result = cpuhp_invoke_callback(cpu, state, bringup, st->node, &st->last);
@@ -673,7 +660,6 @@ static void cpuhp_thread_fun(unsigned int cpu)
st->should_run = false;
}
-next:
cpuhp_lock_release(bringup);
if (!st->should_run)
@@ -916,12 +902,8 @@ void cpuhp_report_idle_dead(void)
static void undo_cpu_down(unsigned int cpu, struct cpuhp_cpu_state *st)
{
- for (st->state++; st->state < st->target; st->state++) {
- struct cpuhp_step *step = cpuhp_get_step(st->state);
-
- if (!step->skip_onerr)
- cpuhp_invoke_callback(cpu, st->state, true, NULL, NULL);
- }
+ for (st->state++; st->state < st->target; st->state++)
+ cpuhp_invoke_callback(cpu, st->state, true, NULL, NULL);
}
static int cpuhp_down_callbacks(unsigned int cpu, struct cpuhp_cpu_state *st,
prev parent reply other threads:[~2018-08-31 12:16 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-28 6:54 [PATCH] cpu/hotplug: Remove skip_onerr field from cpuhp_step structure Mukesh Ojha
2018-08-28 7:55 ` Peter Zijlstra
2018-08-30 11:03 ` [tip:smp/urgent] " tip-bot for Mukesh Ojha
2018-08-31 8:33 ` Peter Zijlstra
2018-08-31 12:14 ` Thomas Gleixner
2018-08-31 12:15 ` tip-bot for Mukesh Ojha [this message]
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