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[PATCH] fix subarchitecture breakage with CONFIG_SCHED_SMT 

Commit 1e9f28fa1e ("[PATCH] sched: new
sched domain for representing multi-core") incorrectly made SCHED_SMT
and some of the structures it uses dependent on SMP.

However, this is wrong, the structures are only defined if X86_HT, so
SCHED_SMT has to depend on that as well.

The patch broke voyager, since it doesn't provide any of the multi-core
or hyperthreading structures.

Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
James Bottomley 2006-06-27 02:53:49 -07:00 committed by Linus Torvalds
parent 4031ff3881
commit 96c5274903
3 changed files with 6 additions and 6 deletions
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4
arch/i386/Kconfig
View File

@ -233,7 +233,7 @@ config NR_CPUS
config SCHED_SMT
bool "SMT (Hyperthreading) scheduler support"
depends on SMP
depends on X86_HT
help
SMT scheduler support improves the CPU scheduler's decision making
when dealing with Intel Pentium 4 chips with HyperThreading at a
@ -242,7 +242,7 @@ config SCHED_SMT
config SCHED_MC
bool "Multi-core scheduler support"
depends on SMP
depends on X86_HT
default y
help
Multi-core scheduler support improves the CPU scheduler's decision

2
arch/i386/kernel/cpu/common.c
View File

@ -294,7 +294,7 @@ void __cpuinit generic_identify(struct cpuinfo_x86 * c)
if (c->x86 >= 0x6)
c->x86_model += ((tfms >> 16) & 0xF) << 4;
c->x86_mask = tfms & 15;
#ifdef CONFIG_SMP
#ifdef CONFIG_X86_HT
c->apicid = phys_pkg_id((ebx >> 24) & 0xFF, 0);
#else
c->apicid = (ebx >> 24) & 0xFF;

6
arch/i386/kernel/cpu/intel_cacheinfo.c
View File

@ -261,7 +261,7 @@ unsigned int __cpuinit init_intel_cacheinfo(struct cpuinfo_x86 *c)
unsigned int new_l1d = 0, new_l1i = 0; /* Cache sizes from cpuid(4) */
unsigned int new_l2 = 0, new_l3 = 0, i; /* Cache sizes from cpuid(4) */
unsigned int l2_id = 0, l3_id = 0, num_threads_sharing, index_msb;
#ifdef CONFIG_SMP
#ifdef CONFIG_X86_HT
unsigned int cpu = (c == &boot_cpu_data) ? 0 : (c - cpu_data);
#endif
@ -383,14 +383,14 @@ unsigned int __cpuinit init_intel_cacheinfo(struct cpuinfo_x86 *c)
if (new_l2) {
l2 = new_l2;
#ifdef CONFIG_SMP
#ifdef CONFIG_X86_HT
cpu_llc_id[cpu] = l2_id;
#endif
}
if (new_l3) {
l3 = new_l3;
#ifdef CONFIG_SMP
#ifdef CONFIG_X86_HT
cpu_llc_id[cpu] = l3_id;
#endif
}