AcoSail/kernel_optimize_test
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Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6

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This commit is contained in:
Linus Torvalds 2006-02-26 20:27:11 -08:00
commit 13f939b5d3
4 changed files with 111 additions and 13 deletions
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2
arch/sparc64/kernel/setup.c
View File

@ -542,6 +542,8 @@ void __init setup_arch(char **cmdline_p)
}
#endif
smp_setup_cpu_possible_map();
paging_init();
}

26
arch/sparc64/kernel/smp.c
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@ -1079,18 +1079,12 @@ int setup_profiling_timer(unsigned int multiplier)
return 0;
}
/* Constrain the number of cpus to max_cpus. */
void __init smp_prepare_cpus(unsigned int max_cpus)
{
if (num_possible_cpus() > max_cpus) {
int instance, mid;
instance = 0;
while (!cpu_find_by_instance(instance, NULL, &mid)) {
if (mid < max_cpus)
cpu_set(mid, phys_cpu_present_map);
instance++;
}
if (num_possible_cpus() > max_cpus) {
instance = 0;
while (!cpu_find_by_instance(instance, NULL, &mid)) {
if (mid != boot_cpu_id) {
@ -1105,6 +1099,22 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
smp_store_cpu_info(boot_cpu_id);
}
/* Set this up early so that things like the scheduler can init
* properly. We use the same cpu mask for both the present and
* possible cpu map.
*/
void __init smp_setup_cpu_possible_map(void)
{
int instance, mid;
instance = 0;
while (!cpu_find_by_instance(instance, NULL, &mid)) {
if (mid < NR_CPUS)
cpu_set(mid, phys_cpu_present_map);
instance++;
}
}
void __devinit smp_prepare_boot_cpu(void)
{
if (hard_smp_processor_id() >= NR_CPUS) {

88
include/asm-sparc64/futex.h
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@ -1,6 +1,86 @@
#ifndef _ASM_FUTEX_H
#define _ASM_FUTEX_H
#ifndef _SPARC64_FUTEX_H
#define _SPARC64_FUTEX_H
#include <asm-generic/futex.h>
#include <linux/futex.h>
#include <asm/errno.h>
#include <asm/system.h>
#include <asm/uaccess.h>
#endif
#define __futex_cas_op(insn, ret, oldval, uaddr, oparg) \
__asm__ __volatile__( \
"\n1: lduwa [%3] %%asi, %2\n" \
" " insn "\n" \
"2: casa [%3] %%asi, %2, %1\n" \
" cmp %2, %1\n" \
" bne,pn %%icc, 1b\n" \
" mov 0, %0\n" \
"3:\n" \
" .section .fixup,#alloc,#execinstr\n" \
" .align 4\n" \
"4: ba 3b\n" \
" mov %5, %0\n" \
" .previous\n" \
" .section __ex_table,#alloc\n" \
" .align 4\n" \
" .word 1b, 4b\n" \
" .word 2b, 4b\n" \
" .previous\n" \
: "=&r" (ret), "=&r" (oldval), "=&r" (tem) \
: "r" (uaddr), "r" (oparg), "i" (-EFAULT) \
: "memory")
static inline int futex_atomic_op_inuser(int encoded_op, int __user *uaddr)
{
int op = (encoded_op >> 28) & 7;
int cmp = (encoded_op >> 24) & 15;
int oparg = (encoded_op << 8) >> 20;
int cmparg = (encoded_op << 20) >> 20;
int oldval = 0, ret, tem;
if (unlikely(!access_ok(VERIFY_WRITE, uaddr, sizeof(int))))
return -EFAULT;
if (unlikely((((unsigned long) uaddr) & 0x3UL)))
return -EINVAL;
if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28))
oparg = 1 << oparg;
inc_preempt_count();
switch (op) {
case FUTEX_OP_SET:
__futex_cas_op("mov\t%4, %1", ret, oldval, uaddr, oparg);
break;
case FUTEX_OP_ADD:
__futex_cas_op("add\t%2, %4, %1", ret, oldval, uaddr, oparg);
break;
case FUTEX_OP_OR:
__futex_cas_op("or\t%2, %4, %1", ret, oldval, uaddr, oparg);
break;
case FUTEX_OP_ANDN:
__futex_cas_op("and\t%2, %4, %1", ret, oldval, uaddr, oparg);
break;
case FUTEX_OP_XOR:
__futex_cas_op("xor\t%2, %4, %1", ret, oldval, uaddr, oparg);
break;
default:
ret = -ENOSYS;
}
dec_preempt_count();
if (!ret) {
switch (cmp) {
case FUTEX_OP_CMP_EQ: ret = (oldval == cmparg); break;
case FUTEX_OP_CMP_NE: ret = (oldval != cmparg); break;
case FUTEX_OP_CMP_LT: ret = (oldval < cmparg); break;
case FUTEX_OP_CMP_GE: ret = (oldval >= cmparg); break;
case FUTEX_OP_CMP_LE: ret = (oldval <= cmparg); break;
case FUTEX_OP_CMP_GT: ret = (oldval > cmparg); break;
default: ret = -ENOSYS;
}
}
return ret;
}
#endif /* !(_SPARC64_FUTEX_H) */

6
include/asm-sparc64/smp.h
View File

@ -66,8 +66,14 @@ static __inline__ int hard_smp_processor_id(void)
#define raw_smp_processor_id() (current_thread_info()->cpu)
extern void smp_setup_cpu_possible_map(void);
#endif /* !(__ASSEMBLY__) */
#else
#define smp_setup_cpu_possible_map() do { } while (0)
#endif /* !(CONFIG_SMP) */
#define NO_PROC_ID 0xFF