lkml.org 
[lkml]   [2018]   [Jan]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] x86/apic: Replace the redundant macros with an empty stub
Date
The X86_LOCAL_APIC is depended on CONFIG X86_64, that means if
CONFIG_X86_64=y, the X86_LOCAL_APIC must be y too.

So, using

if defined(CONFIG_X86_64) || defined(CONFIG_X86_LOCAL_APIC)

... is redundant.

Remove the redundant macros and add an empty stub instead. also add some
comments for init_bsp_APIC().

Signed-off-by: Dou Liyang <douly.fnst@cn.fujitsu.com>
---
arch/x86/include/asm/apic.h | 1 +
arch/x86/kernel/irqinit.c | 9 +++++++--
2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/arch/x86/include/asm/apic.h b/arch/x86/include/asm/apic.h
index 98722773391d..6e1990d69865 100644
--- a/arch/x86/include/asm/apic.h
+++ b/arch/x86/include/asm/apic.h
@@ -183,6 +183,7 @@ static inline void disable_local_APIC(void) { }
# define setup_boot_APIC_clock x86_init_noop
# define setup_secondary_APIC_clock x86_init_noop
static inline void lapic_update_tsc_freq(void) { }
+static inline void init_bsp_APIC(void) { }
static inline void apic_intr_mode_init(void) { }
static inline void lapic_assign_system_vectors(void) { }
static inline void lapic_assign_legacy_vector(unsigned int i, bool r) { }
diff --git a/arch/x86/kernel/irqinit.c b/arch/x86/kernel/irqinit.c
index a539410c4ea9..a0e41397558e 100644
--- a/arch/x86/kernel/irqinit.c
+++ b/arch/x86/kernel/irqinit.c
@@ -61,9 +61,14 @@ void __init init_ISA_irqs(void)
struct irq_chip *chip = legacy_pic->chip;
int i;

-#if defined(CONFIG_X86_64) || defined(CONFIG_X86_LOCAL_APIC)
+ /*
+ * Try to setup the through-local-APIC virtual wire mode earlier.
+ *
+ * In some 32bit UP machines whose APIC has been disabled by BIOS
+ * and re-enabled by "lapic", it hangs at boot time without this.
+ */
init_bsp_APIC();
-#endif
+
legacy_pic->init(0);

for (i = 0; i < nr_legacy_irqs(); i++)
--
2.14.3


\
 
 \ /
  Last update: 2018-01-18 00:20    [W:0.057 / U:0.568 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site