Commit-ID: fae176d6e03578fee7cfe948ff9ae81bf7ea0ef0
Gitweb: http://git.kernel.org/tip/fae176d6e03578fee7cfe948ff9ae81bf7ea0ef0
Author: Jiri Slaby <jirislaby@xxxxxxxxx>
AuthorDate: Mon, 2 Mar 2009 10:53:58 +0100
Commit: Ingo Molnar <mingo@xxxxxxx>
CommitDate: Mon, 2 Mar 2009 11:20:34 +0100
x86_32: apic/summit_32, fix cpu_mask_to_apicid
Perform same-cluster checking even for masks with all (nr_cpu_ids)
bits set and report correct apicid on success instead.
While at it, convert it to for_each_cpu and newer cpumask api.
Signed-off-by: Jiri Slaby <jirislaby@xxxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
---
arch/x86/kernel/apic/summit_32.c | 30 +++++++++---------------------
1 files changed, 9 insertions(+), 21 deletions(-)
diff --git a/arch/x86/kernel/apic/summit_32.c b/arch/x86/kernel/apic/summit_32.c
index 0a1135c..beda620 100644
--- a/arch/x86/kernel/apic/summit_32.c
+++ b/arch/x86/kernel/apic/summit_32.c
@@ -291,33 +291,21 @@ static int summit_check_phys_apicid_present(int boot_cpu_physical_apicid)
static unsigned int summit_cpu_mask_to_apicid(const cpumask_t *cpumask)
{
- int cpus_found = 0;
- int num_bits_set;
- int apicid;
- int cpu;
+ unsigned int round = 0;
+ int cpu, apicid = 0;
- num_bits_set = cpus_weight(*cpumask);
- if (num_bits_set >= nr_cpu_ids)
- return BAD_APICID;
/*
* The cpus in the mask must all be on the apic cluster.
*/
- cpu = first_cpu(*cpumask);
- apicid = summit_cpu_to_logical_apicid(cpu);
-
- while (cpus_found < num_bits_set) {
- if (cpu_isset(cpu, *cpumask)) {
- int new_apicid = summit_cpu_to_logical_apicid(cpu);
+ for_each_cpu(cpu, cpumask) {
+ int new_apicid = summit_cpu_to_logical_apicid(cpu);
- if (APIC_CLUSTER(apicid) != APIC_CLUSTER(new_apicid)) {
- printk("%s: Not a valid mask!\n", __func__);
-
- return BAD_APICID;
- }
- apicid = apicid | new_apicid;
- cpus_found++;
+ if (round && APIC_CLUSTER(apicid) != APIC_CLUSTER(new_apicid)) {
+ printk("%s: Not a valid mask!\n", __func__);
+ return BAD_APICID;
}
- cpu++;
+ apicid |= new_apicid;
+ round++;
}
return apicid;
}
--
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