Commit-ID: 30b8b0066cafef274fc92462578ee346211ce7cb
Gitweb: http://git.kernel.org/tip/30b8b0066cafef274fc92462578ee346211ce7cb
Author: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
AuthorDate: Thu, 15 Jan 2015 21:22:39 +0000
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Thu, 22 Jan 2015 15:10:56 +0100
init: Get rid of x86isms
The UP local API support can be set up from an early initcall. No need
for horrible hackery in the init code.
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Jiang Liu <jiang.liu@xxxxxxxxxxxxxxx>
Cc: Joerg Roedel <joro@xxxxxxxxxx>
Cc: Tony Luck <tony.luck@xxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Link: http://lkml.kernel.org/r/20150115211703.827943883@xxxxxxxxxxxxx
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
arch/x86/Kconfig | 4 ++++
arch/x86/kernel/apic/apic.c | 7 +++++++
include/linux/smp.h | 7 +++++++
init/main.c | 13 -------------
4 files changed, 18 insertions(+), 13 deletions(-)
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index ba397bd..ffcc3ca 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -855,6 +855,10 @@ config SCHED_MC
source "kernel/Kconfig.preempt"
+config UP_LATE_INIT
+ def_bool y
+ depends on X86_UP_APIC
+
config X86_UP_APIC
bool "Local APIC support on uniprocessors"
depends on X86_32 && !SMP && !X86_32_NON_STANDARD && !PCI_MSI
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index c681e9b..19f1bc7 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -2267,6 +2267,13 @@ int __init APIC_init_uniprocessor(void)
return 0;
}
+#ifdef CONFIG_UP_LATE_INIT
+void __init up_late_init(void)
+{
+ APIC_init_uniprocessor();
+}
+#endif
+
/*
* Power management
*/
diff --git a/include/linux/smp.h b/include/linux/smp.h
index 93dff5f..be91db2 100644
--- a/include/linux/smp.h
+++ b/include/linux/smp.h
@@ -151,6 +151,13 @@ smp_call_function_any(const struct cpumask *mask, smp_call_func_t func,
static inline void kick_all_cpus_sync(void) { }
static inline void wake_up_all_idle_cpus(void) { }
+#ifdef CONFIG_UP_LATE_INIT
+extern void __init up_late_init(void);
+static inline void smp_init(void) { up_late_init(); }
+#else
+static inline void smp_init(void) { }
+#endif
+
#endif /* !SMP */
/*
diff --git a/init/main.c b/init/main.c
index 61b99376..179ada1 100644
--- a/init/main.c
+++ b/init/main.c
@@ -87,10 +87,6 @@
#include <asm/sections.h>
#include <asm/cacheflush.h>
-#ifdef CONFIG_X86_LOCAL_APIC
-#include <asm/smp.h>
-#endif
-
static int kernel_init(void *);
extern void init_IRQ(void);
@@ -351,15 +347,6 @@ __setup("rdinit=", rdinit_setup);
#ifndef CONFIG_SMP
static const unsigned int setup_max_cpus = NR_CPUS;
-#ifdef CONFIG_X86_LOCAL_APIC
-static void __init smp_init(void)
-{
- APIC_init_uniprocessor();
-}
-#else
-#define smp_init() do { } while (0)
-#endif
-
static inline void setup_nr_cpu_ids(void) { }
static inline void smp_prepare_cpus(unsigned int maxcpus) { }
#endif
--
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