linux-kernel - [PATCH 2/4] acpi,pci,irq: remove redundant code in acpi_irq_penalty

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1457484079-18202-2-git-send-email-okaya@codeaurora.org>
Date:	Tue,  8 Mar 2016 19:41:17 -0500
From:	Sinan Kaya <okaya@...eaurora.org>
To:	linux-acpi@...r.kernel.org, timur@...eaurora.org,
	cov@...eaurora.org
Cc:	linux-pci@...r.kernel.org, ravikanth.nalla@....com,
	lenb@...nel.org, harish.k@....com, ashwin.reghunandanan@....com,
	bhelgaas@...gle.com, rjw@...ysocki.net,
	Sinan Kaya <okaya@...eaurora.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
	Robert Moore <robert.moore@...el.com>,
	Lv Zheng <lv.zheng@...el.com>, linux-kernel@...r.kernel.org,
	devel@...ica.org
Subject: [PATCH 2/4] acpi,pci,irq: remove redundant code in acpi_irq_penalty_init

acpi_irq_get_penalty is now calculating the penalty on the fly now.
No need to maintain global list of penalties or calculate them
at the init time. Removing duplicate code in acpi_irq_penalty_init.

Signed-off-by: Sinan Kaya <okaya@...eaurora.org>
---
 arch/x86/pci/acpi.c         |  1 -
 drivers/acpi/pci_link.c     | 35 -----------------------------------
 include/acpi/acpi_drivers.h |  1 -
 3 files changed, 37 deletions(-)

diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c
index 3cd6983..b2a4e2a 100644
--- a/arch/x86/pci/acpi.c
+++ b/arch/x86/pci/acpi.c
@@ -396,7 +396,6 @@ int __init pci_acpi_init(void)
 		return -ENODEV;
 
 	printk(KERN_INFO "PCI: Using ACPI for IRQ routing\n");
-	acpi_irq_penalty_init();
 	pcibios_enable_irq = acpi_pci_irq_enable;
 	pcibios_disable_irq = acpi_pci_irq_disable;
 	x86_init.pci.init_irq = x86_init_noop;
diff --git a/drivers/acpi/pci_link.c b/drivers/acpi/pci_link.c
index a5a66ca..eb8e770 100644
--- a/drivers/acpi/pci_link.c
+++ b/drivers/acpi/pci_link.c
@@ -511,41 +511,6 @@ static int acpi_irq_get_penalty(int irq)
 	return penalty;
 }
 
-int __init acpi_irq_penalty_init(void)
-{
-	struct acpi_pci_link *link;
-	int i;
-
-	/*
-	 * Update penalties to facilitate IRQ balancing.
-	 */
-	list_for_each_entry(link, &acpi_link_list, list) {
-
-		/*
-		 * reflect the possible and active irqs in the penalty table --
-		 * useful for breaking ties.
-		 */
-		if (link->irq.possible_count) {
-			int penalty =
-			    PIRQ_PENALTY_PCI_POSSIBLE /
-			    link->irq.possible_count;
-
-			for (i = 0; i < link->irq.possible_count; i++) {
-				if (link->irq.possible[i] < ACPI_MAX_ISA_IRQ)
-					acpi_irq_penalty[link->irq.
-							 possible[i]] +=
-					    penalty;
-			}
-
-		} else if (link->irq.active) {
-			acpi_irq_penalty[link->irq.active] +=
-			    PIRQ_PENALTY_PCI_POSSIBLE;
-		}
-	}
-
-	return 0;
-}
-
 static int acpi_irq_balance = -1;	/* 0: static, 1: balance */
 
 static int acpi_pci_link_allocate(struct acpi_pci_link *link)
diff --git a/include/acpi/acpi_drivers.h b/include/acpi/acpi_drivers.h
index 29c6912..797ae2e 100644
--- a/include/acpi/acpi_drivers.h
+++ b/include/acpi/acpi_drivers.h
@@ -78,7 +78,6 @@
 
 /* ACPI PCI Interrupt Link (pci_link.c) */
 
-int acpi_irq_penalty_init(void);
 int acpi_pci_link_allocate_irq(acpi_handle handle, int index, int *triggering,
 			       int *polarity, char **name);
 int acpi_pci_link_free_irq(acpi_handle handle);
-- 
1.8.2.1