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author | Mike Travis <travis@sgi.com> | 2008-12-31 18:08:46 -0800 |
---|---|---|
committer | Ingo Molnar <mingo@elte.hu> | 2009-01-03 19:00:55 +0100 |
commit | 9628937d5b37169151c5f6bbd40919c6ac958a46 (patch) | |
tree | 09e49f6960806e4115b3345ccc4b5745ca784074 /arch/x86/include/asm/es7000 | |
parent | 6ca09dfc9f180d038dcef93c167a833f43a8246f (diff) | |
download | linux-9628937d5b37169151c5f6bbd40919c6ac958a46.tar.gz linux-9628937d5b37169151c5f6bbd40919c6ac958a46.tar.bz2 linux-9628937d5b37169151c5f6bbd40919c6ac958a46.zip |
x86: cleanup some remaining usages of NR_CPUS where s/b nr_cpu_ids
Impact: Reduce future system panics due to cpumask operations using NR_CPUS
Insure that code does not look at bits >= nr_cpu_ids as when cpumasks are
allocated based on nr_cpu_ids, these extra bits will not be defined.
Also some other minor updates:
* change in to use cpu accessor function set_cpu_present() instead of
directly accessing cpu_present_map w/cpu_clear() [arch/x86/kernel/reboot.c]
* use cpumask_of() instead of &cpumask_of_cpu() [arch/x86/kernel/reboot.c]
* optimize some cpu_mask_to_apicid_and functions.
Signed-off-by: Mike Travis <travis@sgi.com>
Acked-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/include/asm/es7000')
-rw-r--r-- | arch/x86/include/asm/es7000/apic.h | 32 |
1 files changed, 3 insertions, 29 deletions
diff --git a/arch/x86/include/asm/es7000/apic.h b/arch/x86/include/asm/es7000/apic.h index 51ac1230294e..bc53d5ef1386 100644 --- a/arch/x86/include/asm/es7000/apic.h +++ b/arch/x86/include/asm/es7000/apic.h @@ -157,7 +157,7 @@ cpu_mask_to_apicid_cluster(const struct cpumask *cpumask) num_bits_set = cpumask_weight(cpumask); /* Return id to all */ - if (num_bits_set == NR_CPUS) + if (num_bits_set == nr_cpu_ids) return 0xFF; /* * The cpus in the mask must all be on the apic cluster. If are not @@ -190,7 +190,7 @@ static inline unsigned int cpu_mask_to_apicid(const cpumask_t *cpumask) num_bits_set = cpus_weight(*cpumask); /* Return id to all */ - if (num_bits_set == NR_CPUS) + if (num_bits_set == nr_cpu_ids) return cpu_to_logical_apicid(0); /* * The cpus in the mask must all be on the apic cluster. If are not @@ -218,9 +218,6 @@ static inline unsigned int cpu_mask_to_apicid(const cpumask_t *cpumask) static inline unsigned int cpu_mask_to_apicid_and(const struct cpumask *inmask, const struct cpumask *andmask) { - int num_bits_set; - int cpus_found = 0; - int cpu; int apicid = cpu_to_logical_apicid(0); cpumask_var_t cpumask; @@ -229,31 +226,8 @@ static inline unsigned int cpu_mask_to_apicid_and(const struct cpumask *inmask, cpumask_and(cpumask, inmask, andmask); cpumask_and(cpumask, cpumask, cpu_online_mask); + apicid = cpu_mask_to_apicid(cpumask); - num_bits_set = cpumask_weight(cpumask); - /* Return id to all */ - if (num_bits_set == NR_CPUS) - goto exit; - /* - * The cpus in the mask must all be on the apic cluster. If are not - * on the same apicid cluster return default value of TARGET_CPUS. - */ - cpu = cpumask_first(cpumask); - apicid = cpu_to_logical_apicid(cpu); - while (cpus_found < num_bits_set) { - if (cpumask_test_cpu(cpu, cpumask)) { - int new_apicid = cpu_to_logical_apicid(cpu); - if (apicid_cluster(apicid) != - apicid_cluster(new_apicid)){ - printk ("%s: Not a valid mask!\n", __func__); - return cpu_to_logical_apicid(0); - } - apicid = new_apicid; - cpus_found++; - } - cpu++; - } -exit: free_cpumask_var(cpumask); return apicid; } |