From: Juergen Gross <jgross@suse.com>
To: linux-kernel@vger.kernel.org, xen-devel@lists.xenproject.org
Cc: Juergen Gross <jgross@suse.com>,
jeremy@goop.org, jdelvare@suse.com, peterz@infradead.org,
hpa@zytor.com, akataria@vmware.com, x86@kernel.org,
rusty@rustcorp.com.au, virtualization@lists.linux-foundation.org,
chrisw@sous-sol.org, mingo@redhat.com, david.vrabel@citrix.com,
Douglas_Warzecha@dell.com, pali.rohar@gmail.com,
boris.ostrovsky@oracle.com, tglx@linutronix.de,
linux@roeck-us.net
Subject: [PATCH v2 4/6] hwmon: use smp_call_sync_on_phys_cpu() for dell-smm i8k
Date: Mon, 21 Mar 2016 13:24:33 +0100 [thread overview]
Message-ID: <1458563075-30298-5-git-send-email-jgross__45892.3977720135$1458563162$gmane$org@suse.com> (raw)
In-Reply-To: <1458563075-30298-1-git-send-email-jgross@suse.com>
Use the smp_call_sync_on_phys_cpu() function to call system management
mode on cpu 0.
Signed-off-by: Juergen Gross <jgross@suse.com>
---
drivers/hwmon/dell-smm-hwmon.c | 27 ++++++++++++---------------
1 file changed, 12 insertions(+), 15 deletions(-)
diff --git a/drivers/hwmon/dell-smm-hwmon.c b/drivers/hwmon/dell-smm-hwmon.c
index c43318d..4875462 100644
--- a/drivers/hwmon/dell-smm-hwmon.c
+++ b/drivers/hwmon/dell-smm-hwmon.c
@@ -130,23 +130,15 @@ static inline const char *i8k_get_dmi_data(int field)
/*
* Call the System Management Mode BIOS. Code provided by Jonathan Buzzard.
*/
-static int i8k_smm(struct smm_regs *regs)
+static int i8k_smm_func(void *par)
{
int rc;
+ struct smm_regs *regs = par;
int eax = regs->eax;
- cpumask_var_t old_mask;
/* SMM requires CPU 0 */
- if (!alloc_cpumask_var(&old_mask, GFP_KERNEL))
- return -ENOMEM;
- cpumask_copy(old_mask, ¤t->cpus_allowed);
- rc = set_cpus_allowed_ptr(current, cpumask_of(0));
- if (rc)
- goto out;
- if (smp_processor_id() != 0) {
- rc = -EBUSY;
- goto out;
- }
+ if (smp_processor_id() != 0)
+ return -EBUSY;
#if defined(CONFIG_X86_64)
asm volatile("pushq %%rax\n\t"
@@ -204,13 +196,18 @@ static int i8k_smm(struct smm_regs *regs)
if (rc != 0 || (regs->eax & 0xffff) == 0xffff || regs->eax == eax)
rc = -EINVAL;
-out:
- set_cpus_allowed_ptr(current, old_mask);
- free_cpumask_var(old_mask);
return rc;
}
/*
+ * Call the System Management Mode BIOS.
+ */
+static int i8k_smm(struct smm_regs *regs)
+{
+ return smp_call_sync_on_phys_cpu(0, i8k_smm_func, regs);
+}
+
+/*
* Read the fan status.
*/
static int i8k_get_fan_status(int fan)
--
2.6.2
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xen.org
http://lists.xen.org/xen-devel
next prev parent reply other threads:[~2016-03-21 12:24 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1458563075-30298-1-git-send-email-jgross@suse.com>
2016-03-21 12:24 ` [PATCH v2 1/6] xen: sync xen header Juergen Gross
2016-03-21 12:24 ` [PATCH v2 2/6] smp: add function to execute a function synchronously on a physical cpu Juergen Gross
2016-03-21 12:24 ` [PATCH v2 3/6] dcdbas: make use of smp_call_sync_on_phys_cpu() Juergen Gross
2016-03-21 12:24 ` Juergen Gross [this message]
2016-03-21 12:24 ` [PATCH v2 5/6] virt, sched: add cpu pinning to smp_call_sync_on_phys_cpu() Juergen Gross
2016-03-21 13:42 ` Jan Beulich
[not found] ` <56F0087202000078000DED9F@prv-mh.provo.novell.com>
2016-03-21 14:14 ` David Vrabel
[not found] ` <56F0087202000078000DED9F@suse.com>
2016-03-21 14:21 ` Juergen Gross
2016-03-21 12:24 ` [PATCH v2 6/6] xen: add xen_pin_vcpu() to support calling functions on a dedicated pcpu Juergen Gross
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='1458563075-30298-5-git-send-email-jgross__45892.3977720135$1458563162$gmane$org@suse.com' \
--to=jgross@suse.com \
--cc=Douglas_Warzecha@dell.com \
--cc=akataria@vmware.com \
--cc=boris.ostrovsky@oracle.com \
--cc=chrisw@sous-sol.org \
--cc=david.vrabel@citrix.com \
--cc=hpa@zytor.com \
--cc=jdelvare@suse.com \
--cc=jeremy@goop.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux@roeck-us.net \
--cc=mingo@redhat.com \
--cc=pali.rohar@gmail.com \
--cc=peterz@infradead.org \
--cc=rusty@rustcorp.com.au \
--cc=tglx@linutronix.de \
--cc=virtualization@lists.linux-foundation.org \
--cc=x86@kernel.org \
--cc=xen-devel@lists.xenproject.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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).