From: Borislav Petkov <bp@alien8.de>
To: Tony Luck <tony.luck@intel.com>
Cc: X86 ML <x86@kernel.org>, LKML <linux-kernel@vger.kernel.org>
Subject: [PATCH v0 02/12] x86/mce: Remove function-local cpus variables
Date: Thu, 4 Nov 2021 15:40:25 +0100 [thread overview]
Message-ID: <20211104144035.20107-3-bp@alien8.de> (raw)
In-Reply-To: <20211104144035.20107-1-bp@alien8.de>
From: Borislav Petkov <bp@suse.de>
Use num_online_cpus() directly.
No functional changes.
Signed-off-by: Borislav Petkov <bp@suse.de>
---
arch/x86/kernel/cpu/mce/core.c | 8 ++------
1 file changed, 2 insertions(+), 6 deletions(-)
diff --git a/arch/x86/kernel/cpu/mce/core.c b/arch/x86/kernel/cpu/mce/core.c
index 52d277c955f9..0dcd7ac7444c 100644
--- a/arch/x86/kernel/cpu/mce/core.c
+++ b/arch/x86/kernel/cpu/mce/core.c
@@ -989,7 +989,6 @@ static atomic_t global_nwo;
static int mce_start(int *no_way_out)
{
int order;
- int cpus = num_online_cpus();
u64 timeout = (u64)mca_cfg.monarch_timeout * NSEC_PER_USEC;
if (!timeout)
@@ -1006,7 +1005,7 @@ static int mce_start(int *no_way_out)
/*
* Wait for everyone.
*/
- while (atomic_read(&mce_callin) != cpus) {
+ while (atomic_read(&mce_callin) != num_online_cpus()) {
if (mce_timed_out(&timeout,
"Timeout: Not all CPUs entered broadcast exception handler")) {
atomic_set(&global_nwo, 0);
@@ -1070,14 +1069,11 @@ static int mce_end(int order)
atomic_inc(&mce_executing);
if (order == 1) {
- /* CHECKME: Can this race with a parallel hotplug? */
- int cpus = num_online_cpus();
-
/*
* Monarch: Wait for everyone to go through their scanning
* loops.
*/
- while (atomic_read(&mce_executing) <= cpus) {
+ while (atomic_read(&mce_executing) <= num_online_cpus()) {
if (mce_timed_out(&timeout,
"Timeout: Monarch CPU unable to finish machine check processing"))
goto reset;
--
2.29.2
next prev parent reply other threads:[~2021-11-04 14:40 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-04 14:40 [PATCH v0 00/12] x86/mce: Correct the noinstr annotation Borislav Petkov
2021-11-04 14:40 ` [PATCH v0 01/12] x86/mce: Do not use memset to clear the banks bitmaps Borislav Petkov
2021-11-04 14:40 ` Borislav Petkov [this message]
2021-11-04 14:40 ` [PATCH v0 03/12] x86/mce: Use mce_rdmsrl() in severity checking code Borislav Petkov
2021-11-04 14:40 ` [PATCH v0 04/12] x86/mce: Remove noinstr annotation from mce_setup() Borislav Petkov
2021-11-04 14:40 ` [PATCH v0 05/12] x86/mce: Allow instrumentation during task work queueing Borislav Petkov
2021-11-09 22:05 ` Borislav Petkov
2021-11-04 14:40 ` [PATCH v0 06/12] x86/mce: Prevent severity computation from being instrumented Borislav Petkov
2021-11-04 14:40 ` [PATCH v0 07/12] x86/mce: Mark mce_panic() noinstr Borislav Petkov
2021-11-04 14:40 ` [PATCH v0 08/12] x86/mce: Mark mce_end() noinstr Borislav Petkov
2021-11-04 14:40 ` [PATCH v0 09/12] x86/mce: Mark mce_read_aux() noinstr Borislav Petkov
2021-11-04 14:40 ` [PATCH v0 10/12] x86/mce: Move the tainting outside of the noinstr region Borislav Petkov
2021-11-04 14:40 ` [PATCH v0 11/12] x86/mce: Mark mce_timed_out() noinstr Borislav Petkov
2021-11-04 14:40 ` [PATCH v0 12/12] x86/mce: Mark mce_start() noinstr Borislav Petkov
2021-11-09 22:08 ` [PATCH v0 00/12] x86/mce: Correct the noinstr annotation Peter Zijlstra
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20211104144035.20107-3-bp@alien8.de \
--to=bp@alien8.de \
--cc=linux-kernel@vger.kernel.org \
--cc=tony.luck@intel.com \
--cc=x86@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.