Commit-ID: ce279cdc04aafd5c41ae49f941ee2c3342e35e3e Gitweb: https://git.kernel.org/tip/ce279cdc04aafd5c41ae49f941ee2c3342e35e3e Author: Baoquan He <b...@redhat.com> AuthorDate: Wed, 14 Feb 2018 13:46:51 +0800 Committer: Ingo Molnar <mi...@kernel.org> CommitDate: Sat, 17 Feb 2018 11:47:29 +0100
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() into the new restore_boot_irq_mode() function. No functional changes. Signed-off-by: Baoquan He <b...@redhat.com> Reviewed-by: Eric W. Biederman <ebied...@xmission.com> Cc: Linus Torvalds <torva...@linux-foundation.org> Cc: Peter Zijlstra <pet...@infradead.org> Cc: Thomas Gleixner <t...@linutronix.de> Cc: douly.f...@cn.fujitsu.com Cc: j...@8bytes.org Cc: pra...@redhat.com Cc: uober...@redhat.com Link: http://lkml.kernel.org/r/20180214054656.3780-2-...@redhat.com [ Build fix for !CONFIG_IO_APIC and rewrote the changelog. ] Signed-off-by: Ingo Molnar <mi...@kernel.org> --- arch/x86/include/asm/io_apic.h | 2 ++ arch/x86/kernel/apic/io_apic.c | 5 +++++ 2 files changed, 7 insertions(+) diff --git a/arch/x86/include/asm/io_apic.h b/arch/x86/include/asm/io_apic.h index a8834dd..4e3bb13 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 */ @@ -232,6 +233,7 @@ static inline void io_apic_init_mappings(void) { } static inline void setup_IO_APIC(void) { } static inline void enable_IO_APIC(void) { } +static inline void restore_boot_irq_mode(void) { } #endif diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c index 8ad2e41..7b73b6b 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;
