The patch titled
i386: move common parts of smp into their own file
has been removed from the -mm tree. Its filename was
i386-move-common-parts-of-smp-into-their-own-file.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
Subject: i386: move common parts of smp into their own file
From: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Several parts of kernel/smp.c and smpboot.c are generally useful for other
subarchitectures and paravirt_ops implementations, so make them available for
reuse.
Signed-off-by: Jeremy Fitzhardinge <jeremy@xxxxxxxxxxxxx>
Acked-by: Chris Wright <chrisw@xxxxxxxxxxxx>
Cc: James Bottomley <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx>
Cc: Eric W. Biederman <ebiederm@xxxxxxxxxxxx>
Cc: Andi Kleen <ak@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/i386/kernel/Makefile | 1
arch/i386/kernel/smp.c | 65 ++-------------------------
arch/i386/kernel/smpboot.c | 22 ---------
arch/i386/kernel/smpcommon.c | 79 +++++++++++++++++++++++++++++++++
include/asm-i386/processor.h | 4 +
5 files changed, 90 insertions(+), 81 deletions(-)
diff -puN arch/i386/kernel/Makefile~i386-move-common-parts-of-smp-into-their-own-file arch/i386/kernel/Makefile
--- a/arch/i386/kernel/Makefile~i386-move-common-parts-of-smp-into-their-own-file
+++ a/arch/i386/kernel/Makefile
@@ -19,6 +19,7 @@ obj-$(CONFIG_X86_CPUID) += cpuid.o
obj-$(CONFIG_MICROCODE) += microcode.o
obj-$(CONFIG_APM) += apm.o
obj-$(CONFIG_X86_SMP) += smp.o smpboot.o tsc_sync.o
+obj-$(CONFIG_SMP) += smpcommon.o
obj-$(CONFIG_X86_TRAMPOLINE) += trampoline.o
obj-$(CONFIG_X86_MPPARSE) += mpparse.o
obj-$(CONFIG_X86_LOCAL_APIC) += apic.o nmi.o
diff -puN arch/i386/kernel/smp.c~i386-move-common-parts-of-smp-into-their-own-file arch/i386/kernel/smp.c
--- a/arch/i386/kernel/smp.c~i386-move-common-parts-of-smp-into-their-own-file
+++ a/arch/i386/kernel/smp.c
@@ -467,7 +467,7 @@ void flush_tlb_all(void)
* it goes straight through and wastes no time serializing
* anything. Worst case is that we lose a reschedule ...
*/
-void native_smp_send_reschedule(int cpu)
+static void native_smp_send_reschedule(int cpu)
{
WARN_ON(cpu_is_offline(cpu));
send_IPI_mask(cpumask_of_cpu(cpu), RESCHEDULE_VECTOR);
@@ -546,9 +546,10 @@ static void __smp_call_function(void (*f
* You must not call this function with disabled interrupts or from a
* hardware interrupt handler or from a bottom half handler.
*/
-int native_smp_call_function_mask(cpumask_t mask,
- void (*func)(void *), void *info,
- int wait)
+static int
+native_smp_call_function_mask(cpumask_t mask,
+ void (*func)(void *), void *info,
+ int wait)
{
struct call_data_struct data;
cpumask_t allbutself;
@@ -599,60 +600,6 @@ int native_smp_call_function_mask(cpumas
return 0;
}
-/**
- * smp_call_function(): Run a function on all other CPUs.
- * @func: The function to run. This must be fast and non-blocking.
- * @info: An arbitrary pointer to pass to the function.
- * @nonatomic: Unused.
- * @wait: If true, wait (atomically) until function has completed on other CPUs.
- *
- * Returns 0 on success, else a negative status code.
- *
- * If @wait is true, then returns once @func has returned; otherwise
- * it returns just before the target cpu calls @func.
- *
- * You must not call this function with disabled interrupts or from a
- * hardware interrupt handler or from a bottom half handler.
- */
-int smp_call_function(void (*func) (void *info), void *info, int nonatomic,
- int wait)
-{
- return smp_call_function_mask(cpu_online_map, func, info, wait);
-}
-EXPORT_SYMBOL(smp_call_function);
-
-/**
- * smp_call_function_single - Run a function on another CPU
- * @cpu: The target CPU. Cannot be the calling CPU.
- * @func: The function to run. This must be fast and non-blocking.
- * @info: An arbitrary pointer to pass to the function.
- * @nonatomic: Unused.
- * @wait: If true, wait until function has completed on other CPUs.
- *
- * Returns 0 on success, else a negative status code.
- *
- * If @wait is true, then returns once @func has returned; otherwise
- * it returns just before the target cpu calls @func.
- */
-int smp_call_function_single(int cpu, void (*func) (void *info), void *info,
- int nonatomic, int wait)
-{
- /* prevent preemption and reschedule on another processor */
- int ret;
- int me = get_cpu();
- if (cpu == me) {
- WARN_ON(1);
- put_cpu();
- return -EBUSY;
- }
-
- ret = smp_call_function_mask(cpumask_of_cpu(cpu), func, info, wait);
-
- put_cpu();
- return ret;
-}
-EXPORT_SYMBOL(smp_call_function_single);
-
static void stop_this_cpu (void * dummy)
{
local_irq_disable();
@@ -670,7 +617,7 @@ static void stop_this_cpu (void * dummy)
* this function calls the 'stop' function on all other CPUs in the system.
*/
-void native_smp_send_stop(void)
+static void native_smp_send_stop(void)
{
/* Don't deadlock on the call lock in panic */
int nolock = !spin_trylock(&call_lock);
diff -puN arch/i386/kernel/smpboot.c~i386-move-common-parts-of-smp-into-their-own-file arch/i386/kernel/smpboot.c
--- a/arch/i386/kernel/smpboot.c~i386-move-common-parts-of-smp-into-their-own-file
+++ a/arch/i386/kernel/smpboot.c
@@ -98,9 +98,6 @@ EXPORT_SYMBOL(x86_cpu_to_apicid);
u8 apicid_2_node[MAX_APICID];
-DEFINE_PER_CPU(unsigned long, this_cpu_off);
-EXPORT_PER_CPU_SYMBOL(this_cpu_off);
-
/*
* Trampoline 80x86 program as an array.
*/
@@ -763,25 +760,6 @@ static inline struct task_struct * alloc
#define alloc_idle_task(cpu) fork_idle(cpu)
#endif
-/* Initialize the CPU's GDT. This is either the boot CPU doing itself
- (still using the master per-cpu area), or a CPU doing it for a
- secondary which will soon come up. */
-static __cpuinit void init_gdt(int cpu)
-{
- struct desc_struct *gdt = get_cpu_gdt_table(cpu);
-
- pack_descriptor((u32 *)&gdt[GDT_ENTRY_PERCPU].a,
- (u32 *)&gdt[GDT_ENTRY_PERCPU].b,
- __per_cpu_offset[cpu], 0xFFFFF,
- 0x80 | DESCTYPE_S | 0x2, 0x8);
-
- per_cpu(this_cpu_off, cpu) = __per_cpu_offset[cpu];
- per_cpu(cpu_number, cpu) = cpu;
-}
-
-/* Defined in head.S */
-extern struct Xgt_desc_struct early_gdt_descr;
-
static int __cpuinit do_boot_cpu(int apicid, int cpu)
/*
* NOTE - on most systems this is a PHYSICAL apic ID, but on multiquad
diff -puN /dev/null arch/i386/kernel/smpcommon.c
--- /dev/null
+++ a/arch/i386/kernel/smpcommon.c
@@ -0,0 +1,79 @@
+/*
+ * SMP stuff which is common to all sub-architectures.
+ */
+#include <linux/module.h>
+#include <asm/smp.h>
+
+DEFINE_PER_CPU(unsigned long, this_cpu_off);
+EXPORT_PER_CPU_SYMBOL(this_cpu_off);
+
+/* Initialize the CPU's GDT. This is either the boot CPU doing itself
+ (still using the master per-cpu area), or a CPU doing it for a
+ secondary which will soon come up. */
+__cpuinit void init_gdt(int cpu)
+{
+ struct desc_struct *gdt = get_cpu_gdt_table(cpu);
+
+ pack_descriptor((u32 *)&gdt[GDT_ENTRY_PERCPU].a,
+ (u32 *)&gdt[GDT_ENTRY_PERCPU].b,
+ __per_cpu_offset[cpu], 0xFFFFF,
+ 0x80 | DESCTYPE_S | 0x2, 0x8);
+
+ per_cpu(this_cpu_off, cpu) = __per_cpu_offset[cpu];
+ per_cpu(cpu_number, cpu) = cpu;
+}
+
+
+/**
+ * smp_call_function(): Run a function on all other CPUs.
+ * @func: The function to run. This must be fast and non-blocking.
+ * @info: An arbitrary pointer to pass to the function.
+ * @nonatomic: Unused.
+ * @wait: If true, wait (atomically) until function has completed on other CPUs.
+ *
+ * Returns 0 on success, else a negative status code.
+ *
+ * If @wait is true, then returns once @func has returned; otherwise
+ * it returns just before the target cpu calls @func.
+ *
+ * You must not call this function with disabled interrupts or from a
+ * hardware interrupt handler or from a bottom half handler.
+ */
+int smp_call_function(void (*func) (void *info), void *info, int nonatomic,
+ int wait)
+{
+ return smp_call_function_mask(cpu_online_map, func, info, wait);
+}
+EXPORT_SYMBOL(smp_call_function);
+
+/**
+ * smp_call_function_single - Run a function on another CPU
+ * @cpu: The target CPU. Cannot be the calling CPU.
+ * @func: The function to run. This must be fast and non-blocking.
+ * @info: An arbitrary pointer to pass to the function.
+ * @nonatomic: Unused.
+ * @wait: If true, wait until function has completed on other CPUs.
+ *
+ * Returns 0 on success, else a negative status code.
+ *
+ * If @wait is true, then returns once @func has returned; otherwise
+ * it returns just before the target cpu calls @func.
+ */
+int smp_call_function_single(int cpu, void (*func) (void *info), void *info,
+ int nonatomic, int wait)
+{
+ /* prevent preemption and reschedule on another processor */
+ int ret;
+ int me = get_cpu();
+ if (cpu == me) {
+ WARN_ON(1);
+ put_cpu();
+ return -EBUSY;
+ }
+
+ ret = smp_call_function_mask(cpumask_of_cpu(cpu), func, info, wait);
+
+ put_cpu();
+ return ret;
+}
+EXPORT_SYMBOL(smp_call_function_single);
diff -puN include/asm-i386/processor.h~i386-move-common-parts-of-smp-into-their-own-file include/asm-i386/processor.h
--- a/include/asm-i386/processor.h~i386-move-common-parts-of-smp-into-their-own-file
+++ a/include/asm-i386/processor.h
@@ -749,9 +749,13 @@ extern unsigned long boot_option_idle_ov
extern void enable_sep_cpu(void);
extern int sysenter_setup(void);
+/* Defined in head.S */
+extern struct Xgt_desc_struct early_gdt_descr;
+
extern void cpu_set_gdt(int);
extern void switch_to_new_gdt(void);
extern void cpu_init(void);
+extern void init_gdt(int cpu);
extern int force_mwait;
_
Patches currently in -mm which might be from jeremy@xxxxxxxx are
origin.patch
x86-use-elfnoteh-to-generate-vsyscall-notes.patch
x86-use-elfnoteh-to-generate-vsyscall-notes-fix.patch
maps2-uninline-some-functions-in-the-page-walker.patch
maps2-eliminate-the-pmd_walker-struct-in-the-page-walker.patch
maps2-remove-vma-from-args-in-the-page-walker.patch
maps2-propagate-errors-from-callback-in-page-walker.patch
maps2-add-callbacks-for-each-level-to-page-walker.patch
maps2-move-the-page-walker-code-to-lib.patch
maps2-simplify-interdependence-of-proc-pid-maps-and-smaps.patch
maps2-move-clear_refs-code-to-task_mmuc.patch
maps2-regroup-task_mmu-by-interface.patch
maps2-make-proc-pid-smaps-optional-under-config_embedded.patch
maps2-make-proc-pid-clear_refs-option-under-config_embedded.patch
maps2-add-proc-pid-pagemap-interface.patch
maps2-add-proc-kpagemap-interface.patch
add-kstrndup.patch
add-kstrndup-fix.patch
add-argv_split.patch
add-argv_split-fix.patch
split-usermodehelper-setup-from-execution.patch
add-common-orderly_poweroff.patch
add-common-orderly_poweroff-fix.patch
tidy-up-usermode-helper-waiting-a-bit.patch
tidy-up-usermode-helper-waiting-a-bit-fix.patch
lguest-the-guest-code.patch
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