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authorEric W. Biederman <ebiederm@xmission.com>2007-02-23 04:11:56 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-02-26 10:34:07 -0800
commitfc5d56f987170cda1d344095c4df65a60a3e9820 (patch)
treed73ca9b3f20112c42e515127c04c8e3be0bfe178 /arch/x86_64/kernel
parentea3d5226f52ef30f52aa0a04f47f5919c7facacf (diff)
[PATCH] x86_64 irq: Simplfy __assign_irq_vector
By precomputing old_mask I remove an extra if statement, remove an indentation level and make the code slightly easier to read. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/x86_64/kernel')
-rw-r--r--arch/x86_64/kernel/io_apic.c13
1 files changed, 5 insertions, 8 deletions
diff --git a/arch/x86_64/kernel/io_apic.c b/arch/x86_64/kernel/io_apic.c
index 950682f3576..357b354921c 100644
--- a/arch/x86_64/kernel/io_apic.c
+++ b/arch/x86_64/kernel/io_apic.c
@@ -685,6 +685,7 @@ static int __assign_irq_vector(int irq, cpumask_t mask, cpumask_t *result)
* 0x80, because int 0x80 is hm, kind of importantish. ;)
*/
static int current_vector = FIRST_DEVICE_VECTOR, current_offset = 0;
+ cpumask_t old_mask = CPU_MASK_NONE;
int old_vector = -1;
int cpu;
@@ -699,11 +700,12 @@ static int __assign_irq_vector(int irq, cpumask_t mask, cpumask_t *result)
cpus_and(*result, irq_domain[irq], mask);
if (!cpus_empty(*result))
return old_vector;
+ cpus_and(old_mask, irq_domain[irq], cpu_online_map);
}
for_each_cpu_mask(cpu, mask) {
cpumask_t domain, new_mask;
- int new_cpu;
+ int new_cpu, old_cpu;
int vector, offset;
domain = vector_allocation_domain(cpu);
@@ -728,13 +730,8 @@ next:
/* Found one! */
current_vector = vector;
current_offset = offset;
- if (old_vector >= 0) {
- cpumask_t old_mask;
- int old_cpu;
- cpus_and(old_mask, irq_domain[irq], cpu_online_map);
- for_each_cpu_mask(old_cpu, old_mask)
- per_cpu(vector_irq, old_cpu)[old_vector] = -1;
- }
+ for_each_cpu_mask(old_cpu, old_mask)
+ per_cpu(vector_irq, old_cpu)[old_vector] = -1;
for_each_cpu_mask(new_cpu, new_mask)
per_cpu(vector_irq, new_cpu)[vector] = irq;
irq_vector[irq] = vector;