diff options
| author | Rui Wang <rui.y.wang@intel.com> | 2016-06-08 14:59:53 +0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-06-10 14:48:18 +0200 |
| commit | 4855531eb8582a98cb905d2baf86021254d7a675 (patch) | |
| tree | 7876926d4ce6a72586abee78e5205575ccfd5d4c /arch/x86/kernel/apic/io_apic.c | |
| parent | 9d98bcec731756b8688b59ec998707924d716d7b (diff) | |
x86/ioapic: Simplify ioapic_setup_resources()
Optimize the function by removing the variable 'num'.
Signed-off-by: Rui Wang <rui.y.wang@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: tony.luck@intel.com
Cc: linux-pci@vger.kernel.org
Cc: rjw@rjwysocki.net
Cc: linux-acpi@vger.kernel.org
Cc: bhelgaas@google.com
Link: http://lkml.kernel.org/r/1465369193-4816-4-git-send-email-rui.y.wang@intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/kernel/apic/io_apic.c')
| -rw-r--r-- | arch/x86/kernel/apic/io_apic.c | 18 |
1 files changed, 7 insertions, 11 deletions
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c index 446702ed99dc..e58729597a7a 100644 --- a/arch/x86/kernel/apic/io_apic.c +++ b/arch/x86/kernel/apic/io_apic.c @@ -2567,29 +2567,25 @@ static struct resource * __init ioapic_setup_resources(void) unsigned long n; struct resource *res; char *mem; - int i, num = 0; + int i; - for_each_ioapic(i) - num++; - if (num == 0) + if (nr_ioapics == 0) return NULL; n = IOAPIC_RESOURCE_NAME_SIZE + sizeof(struct resource); - n *= num; + n *= nr_ioapics; mem = alloc_bootmem(n); res = (void *)mem; - mem += sizeof(struct resource) * num; + mem += sizeof(struct resource) * nr_ioapics; - num = 0; for_each_ioapic(i) { - res[num].name = mem; - res[num].flags = IORESOURCE_MEM | IORESOURCE_BUSY; + res[i].name = mem; + res[i].flags = IORESOURCE_MEM | IORESOURCE_BUSY; snprintf(mem, IOAPIC_RESOURCE_NAME_SIZE, "IOAPIC %u", i); mem += IOAPIC_RESOURCE_NAME_SIZE; - ioapics[i].iomem_res = &res[num]; - num++; + ioapics[i].iomem_res = &res[i]; } ioapic_resources = res; |