linux-kernel - [PATCH v4 1/5] x86/apic: Split out restore_boot_irq_mode from disable_IO

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: <20180213101051.13630-2-bhe@redhat.com>
Date:   Tue, 13 Feb 2018 18:10:47 +0800
From:   Baoquan He <bhe@...hat.com>
To:     linux-kernel@...r.kernel.org, ebiederm@...ssion.com
Cc:     mingo@...nel.org, tglx@...utronix.de, x86@...nel.org,
        douly.fnst@...fujitsu.com, joro@...tes.org, uobergfe@...hat.com,
        prarit@...hat.com, Baoquan He <bhe@...hat.com>
Subject: [PATCH v4 1/5] x86/apic: Split out restore_boot_irq_mode from disable_IO_APIC

This is a preparation patch. Split out the code which restores boot
irq mode from disable_IO_APIC() and wrap into a new function
restore_boot_irq_mode(). No functional change.

Signed-off-by: Baoquan He <bhe@...hat.com>
---
 arch/x86/include/asm/io_apic.h | 1 +
 arch/x86/kernel/apic/io_apic.c | 5 +++++
 2 files changed, 6 insertions(+)

diff --git a/arch/x86/include/asm/io_apic.h b/arch/x86/include/asm/io_apic.h
index a8834dd546cd..558d1a6a13ad 100644
--- a/arch/x86/include/asm/io_apic.h
+++ b/arch/x86/include/asm/io_apic.h
@@ -193,6 +193,7 @@ static inline unsigned int io_apic_read(unsigned int apic, unsigned int reg)
 extern void setup_IO_APIC(void);
 extern void enable_IO_APIC(void);
 extern void disable_IO_APIC(void);
+extern void restore_boot_irq_mode(void);
 extern int IO_APIC_get_PCI_irq_vector(int bus, int devfn, int pin);
 extern void print_IO_APICs(void);
 #else  /* !CONFIG_X86_IO_APIC */
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 8ad2e410974f..7b73b6b9b4b6 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -1448,6 +1448,11 @@ void disable_IO_APIC(void)
 	 */
 	clear_IO_APIC();
 
+	restore_boot_irq_mode();
+}
+
+void restore_boot_irq_mode(void)
+{
 	if (!nr_legacy_irqs())
 		return;
 
-- 
2.13.6