From: Daniel Bristot de Oliveira <bristot@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
"H. Peter Anvin" <hpa@zytor.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Pavel Tatashin <pasha.tatashin@oracle.com>,
Masami Hiramatsu <mhiramat@kernel.org>,
"Steven Rostedt (VMware)" <rostedt@goodmis.org>,
Zhou Chengming <zhouchengming1@huawei.com>,
Jiri Kosina <jkosina@suse.cz>,
Josh Poimboeuf <jpoimboe@redhat.com>,
"Peter Zijlstra (Intel)" <peterz@infradead.org>,
Chris von Recklinghausen <crecklin@redhat.com>,
Jason Baron <jbaron@akamai.com>, Scott Wood <swood@redhat.com>,
Marcelo Tosatti <mtosatti@redhat.com>,
Clark Williams <williams@redhat.com>,
x86@kernel.org
Subject: [PATCH V2 1/9] jump_label: Add for_each_label_entry helper
Date: Tue, 18 Dec 2018 17:46:30 +0100 [thread overview]
Message-ID: <c1b514e312238c0fe4e22500d1d41c0f565cae28.1545149539.git.bristot@redhat.com> (raw)
In-Reply-To: <cover.1545149539.git.bristot@redhat.com>
This patch adds the helper:
for_each_label_entry(key, entry, stop)
For the "for each jump label entry" for defined as:
for (; (entry < stop) && (jump_entry_key(entry) == key); entry++)
Simplifying the reading and usage.
Signed-off-by: Daniel Bristot de Oliveira <bristot@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Pavel Tatashin <pasha.tatashin@oracle.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: "Steven Rostedt (VMware)" <rostedt@goodmis.org>
Cc: Zhou Chengming <zhouchengming1@huawei.com>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: "Peter Zijlstra (Intel)" <peterz@infradead.org>
Cc: Chris von Recklinghausen <crecklin@redhat.com>
Cc: Jason Baron <jbaron@akamai.com>
Cc: Scott Wood <swood@redhat.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Clark Williams <williams@redhat.com>
Cc: x86@kernel.org
Cc: linux-kernel@vger.kernel.org
---
include/linux/jump_label.h | 3 +++
kernel/jump_label.c | 2 +-
2 files changed, 4 insertions(+), 1 deletion(-)
diff --git a/include/linux/jump_label.h b/include/linux/jump_label.h
index 5df6a621e464..c88d903befc0 100644
--- a/include/linux/jump_label.h
+++ b/include/linux/jump_label.h
@@ -231,6 +231,9 @@ extern void static_key_disable(struct static_key *key);
extern void static_key_enable_cpuslocked(struct static_key *key);
extern void static_key_disable_cpuslocked(struct static_key *key);
+#define for_each_label_entry(key, entry, stop) \
+ for (; (entry < stop) && (jump_entry_key(entry) == key); entry++)
+
/*
* We should be using ATOMIC_INIT() for initializing .enabled, but
* the inclusion of atomic.h is problematic for inclusion of jump_label.h
diff --git a/kernel/jump_label.c b/kernel/jump_label.c
index b28028b08d44..65965eb1cf05 100644
--- a/kernel/jump_label.c
+++ b/kernel/jump_label.c
@@ -381,7 +381,7 @@ static void __jump_label_update(struct static_key *key,
struct jump_entry *stop,
bool init)
{
- for (; (entry < stop) && (jump_entry_key(entry) == key); entry++) {
+ for_each_label_entry(key, entry, stop) {
/*
* An entry->code of 0 indicates an entry which has been
* disabled because it was in an init text area.
--
2.17.1
next prev parent reply other threads:[~2018-12-18 16:47 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-18 16:46 [PATCH V2 0/9] x86/jump_label: Bound IPIs sent when updating a static key Daniel Bristot de Oliveira
2018-12-18 16:46 ` Daniel Bristot de Oliveira [this message]
2018-12-18 21:19 ` [PATCH V2 1/9] jump_label: Add for_each_label_entry helper Borislav Petkov
2018-12-19 7:38 ` Daniel Bristot de Oliveira
2018-12-19 10:37 ` Borislav Petkov
2018-12-18 16:46 ` [PATCH V2 2/9] jump_label: Add the jump_label_can_update_check() helper Daniel Bristot de Oliveira
2018-12-18 16:46 ` [PATCH V2 3/9] x86/jump_label: Move checking code away from __jump_label_transform() Daniel Bristot de Oliveira
2018-12-19 8:43 ` Jiri Kosina
2018-12-19 8:49 ` Thomas Gleixner
2018-12-19 10:14 ` Daniel Bristot de Oliveira
2018-12-18 16:46 ` [PATCH V2 4/9] x86/jump_label: Add __jump_label_set_jump_code() helper Daniel Bristot de Oliveira
2018-12-18 16:46 ` [PATCH V2 5/9] x86/alternative: Split text_poke_bp() into tree steps Daniel Bristot de Oliveira
2018-12-18 17:25 ` Steven Rostedt
2018-12-19 8:44 ` Jiri Kosina
2018-12-18 16:46 ` [PATCH V2 6/9] jump_label: Sort entries of the same key by the code Daniel Bristot de Oliveira
2018-12-18 16:46 ` [PATCH V2 7/9] x86/alternative: Batch of patch operations Daniel Bristot de Oliveira
2018-12-18 17:31 ` Steven Rostedt
2018-12-18 19:27 ` Daniel Bristot de Oliveira
2018-12-18 16:46 ` [PATCH V2 8/9] x86/jump_label: Batch jump label updates Daniel Bristot de Oliveira
2018-12-18 16:46 ` [PATCH V2 9/9] jump_label: Batch up if arch supports it Daniel Bristot de Oliveira
2018-12-18 17:35 ` Steven Rostedt
2018-12-18 19:33 ` Daniel Bristot de Oliveira
2018-12-18 20:32 ` Steven Rostedt
2018-12-18 21:06 ` Daniel Bristot de Oliveira
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