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x86: Sanitize smp_record and move it to x86_init_ops 

The x86 quirkification introduced an extra ugly hackery with a
variable pointer in the mpparse code. If the pointer is initialized
then it is dereferenced and the variable set to 0 or incremented.

Create a x86_init_ops function and let the affected numaq code
hold the function. Default init is a setup noop.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Thomas Gleixner 2009-08-20 12:05:01 +02:00
parent 6b18ae3e2f
commit f4848472cd
5 changed files with 34 additions and 9 deletions
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1
arch/x86/include/asm/setup.h
View File

@ -25,7 +25,6 @@ struct x86_quirks {
int (*mach_get_smp_config)(unsigned int early);
int (*mach_find_smp_config)(unsigned int reserve);
int *mpc_record;
int (*mpc_apic_id)(struct mpc_cpu *m);
void (*mpc_oem_bus_info)(struct mpc_bus *m, char *name);
void (*mpc_oem_pci_bus)(struct mpc_bus *m);

12
arch/x86/include/asm/x86_init.h
View File

@ -1,6 +1,14 @@
#ifndef _ASM_X86_PLATFORM_H
#define _ASM_X86_PLATFORM_H
/**
* struct x86_init_mpparse - platform specific mpparse ops
* @mpc_record: platform specific mpc record accounting
*/
struct x86_init_mpparse {
void (*mpc_record)(unsigned int mode);
};
/**
* struct x86_init_resources - platform specific resource related ops
* @probe_roms: probe BIOS roms
@ -22,11 +30,13 @@ struct x86_init_resources {
*
*/
struct x86_init_ops {
struct x86_init_resources resources;
struct x86_init_resources resources;
struct x86_init_mpparse mpparse;
};
extern struct x86_init_ops x86_init;
extern void x86_init_noop(void);
extern void x86_init_uint_noop(unsigned int unused);
#endif

19
arch/x86/kernel/apic/numaq_32.c
View File

@ -66,7 +66,6 @@ struct mpc_trans {
unsigned short trans_reserved;
};
/* x86_quirks member */
static int mpc_record;
static struct mpc_trans *translation_table[MAX_MPC_ENTRY];
@ -177,6 +176,19 @@ static void mpc_oem_pci_bus(struct mpc_bus *m)
quad_local_to_mp_bus_id[quad][local] = m->busid;
}
/*
* Called from mpparse code.
* mode = 0: prescan
* mode = 1: one mpc entry scanned
*/
static void numaq_mpc_record(unsigned int mode)
{
if (!mode)
mpc_record = 0;
else
mpc_record++;
}
static void __init MP_translation_info(struct mpc_trans *m)
{
printk(KERN_INFO
@ -264,7 +276,6 @@ static struct x86_quirks numaq_x86_quirks __initdata = {
.arch_trap_init = NULL,
.mach_get_smp_config = NULL,
.mach_find_smp_config = NULL,
.mpc_record = &mpc_record,
.mpc_apic_id = mpc_apic_id,
.mpc_oem_bus_info = mpc_oem_bus_info,
.mpc_oem_pci_bus = mpc_oem_pci_bus,
@ -285,8 +296,10 @@ static __init void early_check_numaq(void)
if (smp_found_config)
early_get_smp_config();
if (found_numaq)
if (found_numaq) {
x86_quirks = &numaq_x86_quirks;
x86_init.mpparse.mpc_record = numaq_mpc_record;
}
}
int __init get_memcfg_numaq(void)

6
arch/x86/kernel/mpparse.c
View File

@ -320,8 +320,7 @@ static int __init smp_read_mpc(struct mpc_table *mpc, unsigned early)
/*
* Now process the configuration blocks.
*/
if (x86_quirks->mpc_record)
*x86_quirks->mpc_record = 0;
x86_init.mpparse.mpc_record(0);
while (count < mpc->length) {
switch (*mpt) {
@ -353,8 +352,7 @@ static int __init smp_read_mpc(struct mpc_table *mpc, unsigned early)
count = mpc->length;
break;
}
if (x86_quirks->mpc_record)
(*x86_quirks->mpc_record)++;
x86_init.mpparse.mpc_record(1);
}
#ifdef CONFIG_X86_BIGSMP

5
arch/x86/kernel/x86_init.c
View File

@ -10,6 +10,7 @@
#include <asm/e820.h>
void __cpuinit x86_init_noop(void) { }
void __init x86_init_uint_noop(unsigned int unused) { }
/*
* The platform setup functions are preset with the default functions
@ -23,4 +24,8 @@ struct __initdata x86_init_ops x86_init = {
.reserve_ebda_region = reserve_ebda_region,
.memory_setup = default_machine_specific_memory_setup,
},
.mpparse = {
.mpc_record = x86_init_uint_noop,
},
};